Update docs

README.md

@@ -1,16 +1,15 @@
-# Strom 
+# Mhysa
 
 **Dependency-free stream utils for Node.js**
 
-<sub>Released under the [MIT](LICENSE) license.</sub>
+<sub>Released under the [MIT](https://github.com/Wenzil/Mhysa/blob/master/LICENSE) license.</sub>
 
 ```sh
-yarn add stromjs
+yarn add mhysa
-```
-```sh
-npm add stromjs
 ```
 
+<sub>Tested with Node.js versions 8+</sub>
+
 ## fromArray(array)
 Convert an array into a `Readable` stream of its elements
 
@@ -19,14 +18,14 @@ Convert an array into a `Readable` stream of its elements
 | `array` | `T[]` | Array of elements to stream |
 
 ```js
-strom.fromArray(["a", "b"])
+Mhysa.fromArray(["a", "b"])
     .pipe(process.stdout);
 // ab is printed out
 ```
 
 
 ## map(mapper, options)
-Returns a `ReadWrite` stream that maps streamed chunks
+Return a `ReadWrite` stream that maps streamed chunks
 
 | Param | Type | Description |
 | --- | --- | --- |
@@ -36,15 +35,15 @@ Returns a `ReadWrite` stream that maps streamed chunks
 | `options.writableObjectMode` | `boolean` | Whether this stream should behave as a writable stream of objects |
 
 ```js
-strom.fromArray(["a", "b"])
+Mhysa.fromArray(["a", "b"])
-    .pipe(strom.map(s => s.toUpperCase()))
+    .pipe(Mhysa.map(s => s.toUpperCase()))
     .pipe(process.stdout);
 // AB is printed out
 ```
 
 
 ## flatMap(mapper, options)
-Returns a `ReadWrite` stream that flat maps streamed chunks
+Return a `ReadWrite` stream that flat maps streamed chunks
 
 | Param | Type | Description |
 | --- | --- | --- |
@@ -54,15 +53,15 @@ Returns a `ReadWrite` stream that flat maps streamed chunks
 | `options.writableObjectMode` | `boolean` | Whether this stream should behave as a writable stream of objects |
 
 ```js
-strom.fromArray(["a", "AA"])
+Mhysa.fromArray(["a", "AA"])
-    .pipe(strom.flatMap(s => new Array(s.length).fill(s)))
+    .pipe(Mhysa.flatMap(s => new Array(s.length).fill(s)))
     .pipe(process.stdout);
 // aAAAA is printed out
 ```
 
 
 ## filter(predicate, options)
-Returns a `ReadWrite` stream that filters out streamed chunks for which the predicate does not hold
+Return a `ReadWrite` stream that filters out streamed chunks for which the predicate does not hold
 
 | Param | Type | Description |
 | --- | --- | --- |
@@ -71,15 +70,15 @@ Returns a `ReadWrite` stream that filters out streamed chunks for which the pred
 | `options.objectMode` | `boolean` | `boolean` | Whether this stream should behave as a stream of objects |
 
 ```js
-strom.fromArray(["a", "b", "c"])
+Mhysa.fromArray(["a", "b", "c"])
-    .pipe(strom.filter(s => s !== "b"))
+    .pipe(Mhysa.filter(s => s !== "b"))
     .pipe(process.stdout);
 // ac is printed out
 ```
 
 
 ## reduce(iteratee, initialValue, options)
-Returns a `ReadWrite` stream that reduces streamed chunks down to a single value and yield that
+Return a `ReadWrite` stream that reduces streamed chunks down to a single value and yield that
 value
 
 | Param | Type | Description |
@@ -91,16 +90,16 @@ value
 | `options.writableObjectMode` | `boolean` | Whether this stream should behave as a writable stream of objects |
 
 ```js
-strom.fromArray(["a", "b", "cc"])
+Mhysa.fromArray(["a", "b", "cc"])
-    .pipe(strom.reduce((acc, s) => ({ ...acc, [s]: s.length }), {}))
+    .pipe(Mhysa.reduce((acc, s) => ({ ...acc, [s]: s.length }), {}))
-    .pipe(strom.stringify())
+    .pipe(Mhysa.stringify())
     .pipe(process.stdout);
 // {"a":1,"b":1","c":2} is printed out
 ```
 
 
 ## split(separator)
-Returns a `ReadWrite` stream that splits streamed chunks using the given separator
+Return a `ReadWrite` stream that splits streamed chunks using the given separator
 
 | Param | Type | Description |
 | --- | --- | --- |
@@ -109,16 +108,16 @@ Returns a `ReadWrite` stream that splits streamed chunks using the given separat
 | `options.encoding` | `string` | Character encoding to use for decoding chunks. Defaults to utf8
 
 ```js
-strom.fromArray(["a,b", "c,d"])
+Mhysa.fromArray(["a,b", "c,d"])
-    .pipe(strom.split(","))
+    .pipe(Mhysa.split(","))
-    .pipe(strom.join("|"))
+    .pipe(Mhysa.join("|"))
     .pipe(process.stdout);
 // a|bc|d is printed out
 ```
 
 
 ## join(separator)
-Returns a `ReadWrite` stream that joins streamed chunks using the given separator
+Return a `ReadWrite` stream that joins streamed chunks using the given separator
 
 | Param | Type | Description |
 | --- | --- | --- |
@@ -127,15 +126,15 @@ Returns a `ReadWrite` stream that joins streamed chunks using the given separato
 | `options.encoding` | `string` | Character encoding to use for decoding chunks. Defaults to utf8
 
 ```js
-strom.fromArray(["a", "b", "c"])
+Mhysa.fromArray(["a", "b", "c"])
-    .pipe(strom.join(","))
+    .pipe(Mhysa.join(","))
     .pipe(process.stdout);
 // a,b,c is printed out
 ```
 
 
 ## replace(searchValue, replaceValue)
-Returns a `ReadWrite` stream that replaces occurrences of the given string or regular expression  in
+Return a `ReadWrite` stream that replaces occurrences of the given string or regular expression  in
 the streamed chunks with the specified replacement string
 
 | Param | Type | Description |
@@ -146,37 +145,37 @@ the streamed chunks with the specified replacement string
 | `options.encoding` | `string` | Character encoding to use for decoding chunks. Defaults to utf8
 
 ```js
-strom.fromArray(["a1", "b22", "c333"])
+Mhysa.fromArray(["a1", "b22", "c333"])
-    .pipe(strom.replace(/b\d+/, "B"))
+    .pipe(Mhysa.replace(/b\d+/, "B"))
     .pipe(process.stdout);
 // a1Bc333 is printed out
 ```
 
 
 ## parse()
-Returns a `ReadWrite` stream that parses the streamed chunks as JSON
+Return a `ReadWrite` stream that parses the streamed chunks as JSON
 
 ```js
-strom.fromArray(['{ "a": "b" }'])
+Mhysa.fromArray(['{ "a": "b" }'])
-    .pipe(strom.parse())
+    .pipe(Mhysa.parse())
     .once("data", object => console.log(object));
 // { a: 'b' } is printed out
 ```
 
 
 ## stringify()
-Returns a `ReadWrite` stream that stringifies the streamed chunks to JSON
+Return a `ReadWrite` stream that stringifies the streamed chunks to JSON
 
 ```js
-strom.fromArray([{ a: "b" }])
+Mhysa.fromArray([{ a: "b" }])
-    .pipe(strom.stringify())
+    .pipe(Mhysa.stringify())
     .pipe(process.stdout);
 // {"a":"b"} is printed out
 ```
 
 
 ## collect(options)
-Returns a `ReadWrite` stream that collects streamed chunks into an array or buffer
+Return a `ReadWrite` stream that collects streamed chunks into an array or buffer
 
 | Param | Type | Description |
 | --- | --- | --- |
@@ -184,15 +183,15 @@ Returns a `ReadWrite` stream that collects streamed chunks into an array or buff
 | `options.objectMode` | `boolean` | Whether this stream should behave as a stream of objects |
 
 ```js
-strom.fromArray(["a", "b", "c"])
+Mhysa.fromArray(["a", "b", "c"])
-    .pipe(strom.collect({ objectMode: true }))
+    .pipe(Mhysa.collect({ objectMode: true }))
     .once("data", object => console.log(object));
 // [ 'a', 'b', 'c' ] is printed out
 ```
 
 
 ## concat(streams)
-Returns a `Readable` stream of readable streams concatenated together
+Return a `Readable` stream of readable streams concatenated together
 
 | Param | Type | Description |
 | --- | --- | --- |
@@ -201,7 +200,7 @@ Returns a `Readable` stream of readable streams concatenated together
 ```js
 const source1 = new Readable();
 const source2 = new Readable();
-strom.concat(source1, source2).pipe(process.stdout)
+Mhysa.concat(source1, source2).pipe(process.stdout)
 source1.push("a1 ");
 source2.push("c3 ");
 source1.push("b2 ");
@@ -213,7 +212,7 @@ source2.push(null);
 
 
 ## merge(streams)
-Returns a `Readable` stream of readable streams merged together in chunk arrival order
+Return a `Readable` stream of readable streams merged together in chunk arrival order
 
 | Param | Type | Description |
 | --- | --- | --- |
@@ -222,7 +221,7 @@ Returns a `Readable` stream of readable streams merged together in chunk arrival
 ```js
 const source1 = new Readable({ read() {} });
 const source2 = new Readable({ read() {} });
-strom.merge(source1, source2).pipe(process.stdout);
+Mhysa.merge(source1, source2).pipe(process.stdout);
 source1.push("a1 ");
 setTimeout(() => source2.push("c3 "), 10);
 setTimeout(() => source1.push("b2 "), 20);
@@ -234,7 +233,7 @@ setTimeout(() => source2.push(null), 50);
 
 
 ## duplex(writable, readable)
-Returns a `Duplex` stream from a writable stream that is assumed to somehow, when written to,
+Return a `Duplex` stream from a writable stream that is assumed to somehow, when written to,
 cause the given readable stream to yield chunks
 
 | Param | Type | Description |
@@ -244,15 +243,15 @@ cause the given readable stream to yield chunks
 
 ```js
 const catProcess = require("child_process").exec("grep -o ab");
-strom.fromArray(["a", "b", "c"])
+Mhysa.fromArray(["a", "b", "c"])
-    .pipe(strom.duplex(catProcess.stdin, catProcess.stdout))
+    .pipe(Mhysa.duplex(catProcess.stdin, catProcess.stdout))
     .pipe(process.stdout);
 // ab is printed out
 ```
 
 
 ## child(childProcess)
-Returns a `Duplex` stream from a child process' stdin and stdout
+Return a `Duplex` stream from a child process' stdin and stdout
 
 | Param | Type | Description |
 | --- | --- | --- |
@@ -260,15 +259,15 @@ Returns a `Duplex` stream from a child process' stdin and stdout
 
 ```js
 const catProcess = require("child_process").exec("grep -o ab");
-strom.fromArray(["a", "b", "c"])
+Mhysa.fromArray(["a", "b", "c"])
-    .pipe(strom.child(catProcess))
+    .pipe(Mhysa.child(catProcess))
     .pipe(process.stdout);
 // ab is printed out
 ```
 
 
 ## last(readable)
-Returns a `Promise` resolving to the last streamed chunk of the given readable stream, after it has 
+Return a `Promise` resolving to the last streamed chunk of the given readable stream, after it has 
 ended
 
 | Param | Type | Description |
@@ -277,112 +276,9 @@ ended
 
 ```js
 let f = async () => {
-    const source = strom.fromArray(["a", "b", "c"]);
+    const source = Mhysa.fromArray(["a", "b", "c"]);
-    console.log(await strom.last(source));
+    console.log(await Mhysa.last(source));
 };
 f();
 // c is printed out
 ```
-
-## accumulator(flushStrategy, iteratee, options)
-TO BE DOCUMENTED
-
-## batch(batchSize, maxBatchAge, options)
-Returns a `Transform` stream which produces all incoming data in batches of size `batchSize`.
-
-| Param | Type | Description |
-| --- | --- | --- |
-| `batchSize` | `number` | Size of the batches to be produced |
-| `maxBatchAge` | `number`  | Maximum number of milliseconds a message will be queued for. E.g. a batch will be produced before reaching `batchSize` if the first message queued is `maxBatchAge` ms old or more |
-| `options` | `TransformOptions` | Options passed down to the Transform object |
-
-```js
-strom.fromArray(["a", "b", "c", "d"])
-    .pipe(strom.batch(3, 500))
-    .pipe(process.stdout);
-// ["a","b","c"]
-// ["d"] //After 500ms
-```
-
-## compose(streams, errorCb, options)
-
-Returns a `Transform` stream which consists of all `streams` but behaves as a single stream. The returned stream can be piped into and from transparently.
-
-| Param | Type | Description |
-| --- | --- | --- |
-| `streams` | `Array` | Streams to be composed |
-| `errorCb` | `(err: Error) => void`  | Function called when an error occurs in any of the streams |
-| `options` | `TransformOptions` | Options passed down to the Transform object |
-
-```js
-const composed = strom.compose([
-    strom.split(),
-    strom.map(data => data.trim()),
-    strom.filter(str => !!str),
-    strom.parse(),
-    strom.flatMap(data => data),
-    strom.stringify(),
-]);
-
-const data = ["[1,2,3] \n  [4,5,6] ", "\n [7,8,9] \n\n"];
-
-strom.fromArray(data).pipe(composed).pipe(process.stdout);
-// 123456789
-```
-
-## demux(pipelineConstructor, demuxBy, options)
-TO BE DOCUMENTED
-
-## parallelMap(mapper, parallel, sleepTime, options)
-Returns a `Transform` stream which maps incoming data through the async mapper with the given parallelism. 
-
-| Param | Type | Description | Default |
-| --- | --- | --- | --- |
-| `mapper` | `async (chunk: T, encoding: string) => R` | Mapper function, mapping each (chunk, encoding) to a new chunk (non-async will not be parallelized) | -- |
-| `parallel` | `number`  | Number of concurrent executions of the mapper allowed | 10 |
-| `sleepTime` | `number` | Number of milliseconds to wait before testing if more messages can be processed | 1 |
-
-```js
-function sleep(time) {
-    return time > 0 ? new Promise(resolve => setTimeout(resolve, time)) : null;
-}
-
-strom
-    .fromArray([1, 2, 3, 4, 6, 8])
-    .pipe(
-        strom.parallelMap(async d => {
-            await sleep(10000 - d * 1000);
-            return `${d}`;
-        }, 3),
-    )
-    .pipe(process.stdout);
-    
-// 321864
-```
-
-## rate()
-
-
-```js
-const strom = require("stromjs").strom();
-
-function sleep(time) {
-    return time > 0 ? new Promise(resolve => setTimeout(resolve, time)) : null;
-}
-
-const rate = strom.rate(2, 1, { behavior: 1 });
-rate.pipe(strom.map(x => console.log(x)));
-async function produce() {
-    rate.write(1);
-    await sleep(500);
-    rate.write(2);
-    await sleep(500);
-    rate.write(3);
-    rate.write(4);
-    rate.write(5);
-    await sleep(500);
-    rate.write(6);
-}
-
-produce();
-```

package.json

@@ -1,26 +1,24 @@
 {
-    "name": "stromjs",
+    "name": "@jogogo/mhysa",
-    "version": "0.5.1",
+    "version": "2.0.0-alpha.3",
-    "description": "Dependency-free streams utils for Node.js",
+    "description": "Streams and event emitter utils for Node.js",
     "keywords": [
         "promise",
         "stream",
+        "event emitter",
         "utils"
     ],
+    "author": {
+        "name": "Wenzil"
+    },
     "contributors": [
         {
-            "name": "Sami Turcotte",
+            "name": "jerry",
-            "url": "https://github.com/Wenzil"
+            "email": "jerry@jogogo.co"
         },
         {
-           "name": "Jerry Kurian",
+            "name": "lewis",
-           "email": "jerrykurian@protonmail.com",
+            "email": "lewis@jogogo.co"
-           "url": "https://github.com/jkurian"
-        },
-        {
-            "name": "Lewis Diamond",
-            "email": "stromjs@lewisdiamond.com",
-            "url": "https://github.com/lewisdiamond"
         }
     ],
     "license": "MIT",
@@ -29,16 +27,18 @@
     "files": [
         "dist"
     ],
+    "publishConfig": {
+        "registry": "https://npm.dev.jogogo.co/"
+    },
     "repository": {
-        "url": "https://github.com/lewisdiamond/stromjs",
+        "url": "git@github.com:Jogogoplay/mhysa.git",
         "type": "git"
     },
     "scripts": {
         "test": "ava",
         "lint": "tslint -p tsconfig.json",
         "validate:tslint": "tslint-config-prettier-check ./tslint.json",
-        "prepublishOnly": "yarn lint && yarn test && yarn tsc -d",
+        "prepublishOnly": "yarn lint && yarn test && yarn tsc -d"
-        "prepare": "tsc"
     },
     "dependencies": {},
     "devDependencies": {
@@ -47,7 +47,7 @@
         "@types/sinon": "^7.0.13",
         "ava": "^2.4.0",
         "chai": "^4.2.0",
-        "stromjs": "./",
+        "mhysa": "./",
         "prettier": "^1.14.3",
         "sinon": "^7.4.2",
         "ts-node": "^8.3.0",

samples/async.js

@@ -1,9 +1,8 @@
-const strom = require("stromjs");
+const Mhysa = require("mhysa");
 
-strom
+Mhysa.fromArray(["a", "b", "c"])
-    .fromArray(["a", "b", "c"])
+    .pipe(Mhysa.map(s => Promise.resolve(s + s)))
-    .pipe(strom.map(s => Promise.resolve(s + s)))
+    .pipe(Mhysa.flatMap(s => Promise.resolve([s, s.toUpperCase()])))
-    .pipe(strom.flatMap(s => Promise.resolve([s, s.toUpperCase()])))
+    .pipe(Mhysa.filter(s => Promise.resolve(s !== "bb")))
-    .pipe(strom.filter(s => Promise.resolve(s !== "bb")))
+    .pipe(Mhysa.join(","))
-    .pipe(strom.join(","))
     .pipe(process.stdout);

samples/child.js

@@ -1,7 +1,6 @@
-const strom = require("stromjs");
+const Mhysa = require("mhysa");
 const catProcess = require("child_process").exec("grep -o ab");
 
-strom
+Mhysa.fromArray(["a", "b", "c"])
-    .fromArray(["a", "b", "c"])
+    .pipe(Mhysa.child(catProcess))
-    .pipe(strom.child(catProcess))
     .pipe(process.stdout);

samples/collect.js

@@ -1,6 +1,5 @@
-const strom = require("stromjs");
+const Mhysa = require("mhysa");
 
-strom
+Mhysa.fromArray(["a", "b", "c"])
-    .fromArray(["a", "b", "c"])
+    .pipe(Mhysa.collect({ objectMode: true }))
-    .pipe(strom.collect({ objectMode: true }))
     .on("data", object => console.log(object));

samples/concat.js

@@ -1,9 +1,9 @@
 const { Readable } = require("stream");
-const strom = require("stromjs");
+const Mhysa = require("mhysa");
 
 const source1 = new Readable();
 const source2 = new Readable();
-strom.concat(source1, source2).pipe(process.stdout);
+Mhysa.concat(source1, source2).pipe(process.stdout);
 source1.push("a1 ");
 source2.push("c3 ");
 source1.push("b2 ");

samples/duplex.js

@@ -1,7 +1,6 @@
-const strom = require("stromjs");
+const Mhysa = require("mhysa");
 const catProcess = require("child_process").exec("grep -o ab");
 
-strom
+Mhysa.fromArray(["a", "b", "c"])
-    .fromArray(["a", "b", "c"])
+    .pipe(Mhysa.duplex(catProcess.stdin, catProcess.stdout))
-    .pipe(strom.duplex(catProcess.stdin, catProcess.stdout))
     .pipe(process.stdout);

samples/filter.js

@@ -1,7 +1,6 @@
-const strom = require("stromjs");
+const Mhysa = require("mhysa");
 
-strom
+Mhysa.fromArray(["a", "b", "c"])
-    .fromArray(["a", "b", "c"])
+    .pipe(Mhysa.filter(s => s !== "b"))
-    .pipe(strom.filter(s => s !== "b"))
+    .pipe(Mhysa.join(","))
-    .pipe(strom.join(","))
     .pipe(process.stdout);

samples/flatMap.js

@@ -1,7 +1,6 @@
-const strom = require("stromjs");
+const Mhysa = require("mhysa");
 
-strom
+Mhysa.fromArray(["a", "AA"])
-    .fromArray(["a", "AA"])
+    .pipe(Mhysa.flatMap(s => new Array(s.length).fill(s)))
-    .pipe(strom.flatMap(s => new Array(s.length).fill(s)))
+    .pipe(Mhysa.join(","))
-    .pipe(strom.join(","))
     .pipe(process.stdout);

samples/join.js

@@ -1,6 +1,5 @@
-const strom = require("stromjs");
+const Mhysa = require("mhysa");
 
-strom
+Mhysa.fromArray(["a", "b", "c"])
-    .fromArray(["a", "b", "c"])
+    .pipe(Mhysa.join(","))
-    .pipe(strom.join(","))
     .pipe(process.stdout);

samples/last.js

@@ -1,7 +1,7 @@
-const strom = require("stromjs");
+const Mhysa = require("mhysa");
 
 let f = async () => {
-    const source = strom.fromArray(["a", "b", "c"]);
+    const source = Mhysa.fromArray(["a", "b", "c"]);
-    console.log(await strom.last(source));
+    console.log(await Mhysa.last(source));
 };
 f();

samples/map.js

@@ -1,7 +1,6 @@
-const strom = require("stromjs");
+const Mhysa = require("mhysa");
 
-strom
+Mhysa.fromArray(["a", "b"])
-    .fromArray(["a", "b"])
+    .pipe(Mhysa.map(s => s.toUpperCase()))
-    .pipe(strom.map(s => s.toUpperCase()))
+    .pipe(Mhysa.join(","))
-    .pipe(strom.join(","))
     .pipe(process.stdout);

samples/merge.js

@@ -1,9 +1,9 @@
 const { Readable } = require("stream");
-const strom = require("stromjs");
+const Mhysa = require("mhysa");
 
 const source1 = new Readable({ read() {} });
 const source2 = new Readable({ read() {} });
-strom.merge(source1, source2).pipe(process.stdout);
+Mhysa.merge(source1, source2).pipe(process.stdout);
 source1.push("a1 ");
 setTimeout(() => source2.push("c3 "), 10);
 setTimeout(() => source1.push("b2 "), 20);

samples/parallelMap.js

@@ -1,15 +0,0 @@
-const strom = require("stromjs");
-
-function sleep(time) {
-    return time > 0 ? new Promise(resolve => setTimeout(resolve, time)) : null;
-}
-
-strom
-    .fromArray([1, 2, 3, 4, 6, 8])
-    .pipe(
-        strom.parallelMap(async d => {
-            await sleep(10000 - d * 1000);
-            return `${d}`;
-        }, 3),
-    )
-    .pipe(process.stdout);

samples/parse.js

@@ -1,6 +1,5 @@
-const strom = require("stromjs");
+const Mhysa = require("mhysa");
 
-strom
+Mhysa.fromArray(['{ "a": "b" }'])
-    .fromArray(['{ "a": "b" }'])
+    .pipe(Mhysa.parse())
-    .pipe(strom.parse())
     .on("data", object => console.log(object));

samples/rate.js

@@ -1,21 +0,0 @@
-const strom = require("stromjs");
-
-function sleep(time) {
-    return time > 0 ? new Promise(resolve => setTimeout(resolve, time)) : null;
-}
-
-const rate = strom.rate(2, 1, { behavior: 1 });
-rate.pipe(strom.map(x => console.log(x)));
-async function produce() {
-    rate.write(1);
-    await sleep(500);
-    rate.write(2);
-    await sleep(500);
-    rate.write(3);
-    rate.write(4);
-    rate.write(5);
-    await sleep(500);
-    rate.write(6);
-}
-
-produce();

samples/reduce.js

@@ -1,7 +1,6 @@
-const strom = require("stromjs");
+const Mhysa = require("mhysa");
 
-strom
+Mhysa.fromArray(["a", "b", "cc"])
-    .fromArray(["a", "b", "cc"])
+    .pipe(Mhysa.reduce((acc, s) => ({ ...acc, [s]: s.length }), {}))
-    .pipe(strom.reduce((acc, s) => ({ ...acc, [s]: s.length }), {}))
+    .pipe(Mhysa.stringify())
-    .pipe(strom.stringify())
     .pipe(process.stdout);

samples/replace.js

@@ -1,6 +1,5 @@
-const strom = require("stromjs");
+const Mhysa = require("mhysa");
 
-strom
+Mhysa.fromArray(["a1", "b22", "c333"])
-    .fromArray(["a1", "b22", "c333"])
+    .pipe(Mhysa.replace(/b\d+/, "B"))
-    .pipe(strom.replace(/b\d+/, "B"))
     .pipe(process.stdout);

samples/split.js

@@ -1,7 +1,6 @@
-const strom = require("stromjs");
+const Mhysa = require("mhysa");
 
-strom
+Mhysa.fromArray(["a,b", "c,d"])
-    .fromArray(["a,b", "c,d"])
+    .pipe(Mhysa.split(","))
-    .pipe(strom.split(","))
+    .pipe(Mhysa.join("|"))
-    .pipe(strom.join("|"))
     .pipe(process.stdout);

samples/stringify.js

@@ -1,6 +1,5 @@
-const strom = require("stromjs");
+const Mhysa = require("mhysa");
 
-strom
+Mhysa.fromArray([{ a: "b" }])
-    .fromArray([{ a: "b" }])
+    .pipe(Mhysa.stringify())
-    .pipe(strom.stringify())
     .pipe(process.stdout);

src/functions/batch.ts

@@ -2,7 +2,7 @@ import { Transform, TransformOptions } from "stream";
 
 export function batch(
     batchSize: number = 1000,
-    maxBatchAge: number = 0,
+    maxBatchAge: number = 500,
     options: TransformOptions = {},
 ): Transform {
     let buffer: any[] = [];
@@ -23,7 +23,7 @@ export function batch(
             buffer.push(chunk);
             if (buffer.length === batchSize) {
                 sendChunk(this);
-            } else if (maxBatchAge) {
+            } else {
                 if (timer === null) {
                     timer = setInterval(() => {
                         sendChunk(this);

src/functions/demux.ts

@@ -6,45 +6,36 @@ type DemuxStreams = NodeJS.WritableStream | NodeJS.ReadWriteStream;
 
 export interface DemuxOptions extends DuplexOptions {
     remultiplex?: boolean;
+    purgeIdleInterval?: number;
+    maxIdleTime?: number;
 }
 
 export function demux(
-    pipelineConstructor: (
+    construct: (destKey?: string, chunk?: any) => DemuxStreams,
-        destKey?: string,
-        chunk?: any,
-    ) => DemuxStreams | DemuxStreams[],
     demuxBy: string | ((chunk: any) => string),
     options?: DemuxOptions,
 ): Duplex {
-    return new Demux(pipelineConstructor, demuxBy, options);
+    return new Demux(construct, demuxBy, options);
 }
 
 class Demux extends Duplex {
     private streamsByKey: {
-        [key: string]: DemuxStreams[];
+        [key: string]: { stream: DemuxStreams; lastWrite: number };
     };
     private demuxer: (chunk: any) => string;
-    private pipelineConstructor: (
+    private construct: (destKey?: string, chunk?: any) => DemuxStreams;
-        destKey?: string,
-        chunk?: any,
-    ) => DemuxStreams[];
     private remultiplex: boolean;
     private transform: Transform;
+    private maxIdleTime: number;
     constructor(
-        pipelineConstructor: (
+        construct: (destKey?: string) => DemuxStreams,
-            destKey?: string,
-            chunk?: any,
-        ) => DemuxStreams | DemuxStreams[],
         demuxBy: string | ((chunk: any) => string),
         options: DemuxOptions = {},
     ) {
         super(options);
         this.demuxer =
             typeof demuxBy === "string" ? chunk => chunk[demuxBy] : demuxBy;
-        this.pipelineConstructor = (destKey: string, chunk?: any) => {
+        this.construct = construct;
-            const pipeline = pipelineConstructor(destKey, chunk);
-            return Array.isArray(pipeline) ? pipeline : [pipeline];
-        };
         this.remultiplex =
             options.remultiplex === undefined ? true : options.remultiplex;
         this.streamsByKey = {};
@@ -55,77 +46,74 @@ class Demux extends Duplex {
                 cb(null);
             },
         });
+        this.maxIdleTime = options.maxIdleTime || 600000;
+        const purgeIdleInterval = options.purgeIdleInterval || 600000;
+        setInterval(() => {
+            this._destroyIdle();
+        }, purgeIdleInterval);
 
         this.on("unpipe", () => this._flush());
     }
 
+    private _destroyIdle() {
+        for (let key in this.streamsByKey) {
+            const curTime = Date.now();
+            const pipeline = this.streamsByKey[key];
+
+            if (curTime - pipeline.lastWrite > this.maxIdleTime) {
+                delete this.streamsByKey[key];
+            }
+        }
+    }
     // tslint:disable-next-line
     public _read(size: number) {}
 
     public async _write(chunk: any, encoding: any, cb: any) {
         const destKey = this.demuxer(chunk);
         if (this.streamsByKey[destKey] === undefined) {
-            const newPipelines = this.pipelineConstructor(destKey, chunk);
+            const newPipeline = await this.construct(destKey, chunk);
-            this.streamsByKey[destKey] = newPipelines;
+            this.streamsByKey[destKey] = {
-
+                stream: newPipeline,
-            newPipelines.forEach(newPipeline => {
+                lastWrite: Date.now(),
-                if (this.remultiplex && isReadable(newPipeline)) {
+            };
-                    (newPipeline as NodeJS.ReadWriteStream).pipe(
+            if (this.remultiplex && isReadable(newPipeline)) {
-                        this.transform,
+                (newPipeline as NodeJS.ReadWriteStream).pipe(this.transform);
-                    );
+            } else if (this.remultiplex) {
-                } else if (this.remultiplex) {
+                console.error(
-                    console.error(
+                    `Pipeline construct for ${destKey} does not implement readable interface`,
-                        `Pipeline construct for ${destKey} does not implement readable interface`,
-                    );
-                }
-            });
-        }
-        const pipelines = this.streamsByKey[destKey];
-        const pendingDrains: Array<Promise<any>> = [];
-
-        pipelines.forEach(pipeline => {
-            if (!pipeline.write(chunk, encoding)) {
-                pendingDrains.push(
-                    new Promise(resolve => {
-                        pipeline.once("drain", () => {
-                            resolve();
-                        });
-                    }),
                 );
             }
-        });
+        } else {
-        await Promise.all(pendingDrains);
+            this.streamsByKey[destKey].lastWrite = Date.now();
-        cb();
+        }
+
+        if (!this.streamsByKey[destKey].stream.write(chunk, encoding)) {
+            this.streamsByKey[destKey].stream.once("drain", () => {
+                cb();
+            });
+        } else {
+            cb();
+        }
     }
 
     public _flush() {
-        const pipelines: DemuxStreams[] = Array.prototype.concat.apply(
+        const pipelines = Object.values(this.streamsByKey);
-            [],
+        let totalEnded = 0;
-            Object.values(this.streamsByKey),
+        pipelines.forEach(({ stream }) => {
-        );
+            stream.once("end", () => {
-        const flushPromises: Array<Promise<void>> = [];
+                totalEnded++;
-        pipelines.forEach(pipeline => {
+                if (pipelines.length === totalEnded) {
-            flushPromises.push(
+                    this.push(null);
-                new Promise(resolve => {
+                    this.emit("end");
-                    pipeline.once("end", () => {
+                }
-                        resolve();
+            });
-                    });
-                }),
-            );
-        });
-        pipelines.forEach(pipeline => pipeline.end());
-        Promise.all(flushPromises).then(() => {
-            this.push(null);
-            this.emit("end");
         });
+        pipelines.forEach(({ stream }) => stream.end());
     }
 
     public _destroy(error: any, cb: (error?: any) => void) {
-        const pipelines: DemuxStreams[] = [].concat.apply(
+        const pipelines = Object.values(this.streamsByKey);
-            [],
+        pipelines.forEach(({ stream }) => (stream as any).destroy());
-            Object.values(this.streamsByKey),
-        );
-        pipelines.forEach(p => (p as any).destroy());
         cb(error);
     }
 }

src/functions/index.ts

@@ -28,7 +28,7 @@ import { unbatch } from "./unbatch";
 import { compose } from "./compose";
 import { demux } from "./demux";
 
-export function strom(defaultOptions: TransformOptions = { objectMode: true }) {
+export default function mhysa(defaultOptions?: TransformOptions) {
     function withDefaultOptions<T extends any[], R>(
         n: number,
         fn: (...args: T) => R,
@@ -256,17 +256,15 @@ export function strom(defaultOptions: TransformOptions = { objectMode: true }) {
 
         /**
          * Composes multiple streams together. Writing occurs on first stream, piping occurs from last stream.
-         * @param construct Constructor for new output source. Should return a Writable or ReadWrite stream.
+         * @param {Function} construct Constructor for new output source. Should return a Writable or ReadWrite stream.
-         * @param demuxBy
+         * @param {String | Function} demuxBy
-         * @param demuxBy.key? Key to fetch value from source chunks to demultiplex source.
+         * @param {string} demuxBy.key? Key to fetch value from source chunks to demultiplex source.
-         * @param demuxBy.keyBy? Function to fetch value from source chunks to demultiplex source.
+         * @param {Function} demuxBy.keyBy? Function to fetch value from source chunks to demultiplex source.
-         * @param options Writable stream options
+         * @param {Object} options Demux stream options
+         * @param {boolean} options.remultiplex? If demux should be remultiplexed into a single destination
+         * @param {number} options.purgeIdleInterval? Interval at which a purge for idle pipelines will occur
+         * @param {number} options.maxIdleTime? Min time a demuxed pipeline must be idle for to be purged
          */
         demux: withDefaultOptions(2, demux),
-
-        /**
-         * Create a new strom instance overriding the defaults
-         */
-        instance: strom,
     };
 }

src/functions/rate.ts

@@ -2,41 +2,20 @@ import { Transform, TransformOptions } from "stream";
 import { performance } from "perf_hooks";
 import { sleep } from "../helpers";
 
-export enum Behavior {
-    BUFFER = 0,
-    DROP = 1,
-}
-
-export interface RateOptions {
-    window?: number;
-    behavior?: Behavior;
-}
-
 export function rate(
     targetRate: number = 50,
     period: number = 1,
-    options?: TransformOptions & RateOptions,
+    options?: TransformOptions,
 ): Transform {
     const deltaMS = ((1 / targetRate) * 1000) / period; // Skip a full period
     let total = 0;
-    const window = options?.window || Infinity;
+    const start = performance.now();
-    const behavior = options?.behavior || Behavior.BUFFER;
-    let start = performance.now();
     return new Transform({
         ...options,
         async transform(data, encoding, callback) {
-            const now = performance.now();
+            const currentRate = (total / (performance.now() - start)) * 1000;
-            if (now - start >= window) {
-                start = now - window;
-            }
-            const currentRate = (total / (now - start)) * 1000;
             if (targetRate && currentRate > targetRate) {
-                if (behavior === Behavior.DROP) {
+                await sleep(deltaMS);
-                    callback(undefined);
-                    return;
-                } else {
-                    await sleep(deltaMS);
-                }
             }
             total += 1;
             callback(undefined, data);

src/index.ts

@@ -1,29 +1,6 @@
-import { strom } from "./functions";
+import mhysa from "./functions";
-export * from "./utils";
+import * as _utils from "./utils";
-export const {
+export default mhysa;
-    fromArray,
+
-    map,
+// @TODO fix this with proper import export
-    flatMap,
+export const utils = { ..._utils };
-    filter,
-    reduce,
-    split,
-    join,
-    replace,
-    parse,
-    stringify,
-    collect,
-    concat,
-    merge,
-    duplex,
-    child,
-    last,
-    batch,
-    unbatch,
-    rate,
-    parallelMap,
-    accumulator,
-    accumulatorBy,
-    compose,
-    demux,
-    instance,
-} = strom();

tests/accumulator.spec.ts

@@ -1,9 +1,10 @@
 import test from "ava";
 import { expect } from "chai";
 import { Readable } from "stream";
-import { accumulator, accumulatorBy } from "../src";
+import mhysa from "../src";
 import { FlushStrategy } from "../src/functions/accumulator";
 import { performance } from "perf_hooks";
+const { accumulator, accumulatorBy } = mhysa({ objectMode: true });
 
 test.cb("accumulator() rolling", t => {
     t.plan(3);
@@ -13,14 +14,8 @@ test.cb("accumulator() rolling", t => {
         key: string;
     }
     const source = new Readable({ objectMode: true });
-    const firstFlush = [
+    const firstFlush = [{ ts: 0, key: "a" }, { ts: 1, key: "b" }];
-        { ts: 0, key: "a" },
+    const secondFlush = [{ ts: 2, key: "d" }, { ts: 3, key: "e" }];
-        { ts: 1, key: "b" },
-    ];
-    const secondFlush = [
-        { ts: 2, key: "d" },
-        { ts: 3, key: "e" },
-    ];
     const thirdFlush = [{ ts: 4, key: "f" }];
     const flushes = [firstFlush, secondFlush, thirdFlush];
 
@@ -93,10 +88,7 @@ test.cb(
             "nonExistingKey",
             { objectMode: true },
         );
-        const input = [
+        const input = [{ ts: 0, key: "a" }, { ts: 1, key: "b" }];
-            { ts: 0, key: "a" },
-            { ts: 1, key: "b" },
-        ];
 
         source
             .pipe(accumulatorStream)
@@ -190,10 +182,7 @@ test.cb("accumulator() sliding", t => {
         { ts: 4, key: "d" },
     ];
     const firstFlush = [{ ts: 0, key: "a" }];
-    const secondFlush = [
+    const secondFlush = [{ ts: 0, key: "a" }, { ts: 1, key: "b" }];
-        { ts: 0, key: "a" },
-        { ts: 1, key: "b" },
-    ];
     const thirdFlush = [
         { ts: 0, key: "a" },
         { ts: 1, key: "b" },
@@ -243,10 +232,7 @@ test.cb("accumulator() sliding with key", t => {
         { ts: 6, key: "g" },
     ];
     const firstFlush = [{ ts: 0, key: "a" }];
-    const secondFlush = [
+    const secondFlush = [{ ts: 0, key: "a" }, { ts: 1, key: "b" }];
-        { ts: 0, key: "a" },
-        { ts: 1, key: "b" },
-    ];
     const thirdFlush = [
         { ts: 0, key: "a" },
         { ts: 1, key: "b" },
@@ -257,14 +243,8 @@ test.cb("accumulator() sliding with key", t => {
         { ts: 2, key: "c" },
         { ts: 3, key: "d" },
     ];
-    const fifthFlush = [
+    const fifthFlush = [{ ts: 3, key: "d" }, { ts: 5, key: "f" }];
-        { ts: 3, key: "d" },
+    const sixthFlush = [{ ts: 5, key: "f" }, { ts: 6, key: "g" }];
-        { ts: 5, key: "f" },
-    ];
-    const sixthFlush = [
-        { ts: 5, key: "f" },
-        { ts: 6, key: "g" },
-    ];
 
     const flushes = [
         firstFlush,
@@ -306,10 +286,7 @@ test.cb(
             "nonExistingKey",
             { objectMode: true },
         );
-        const input = [
+        const input = [{ ts: 0, key: "a" }, { ts: 1, key: "b" }];
-            { ts: 0, key: "a" },
-            { ts: 1, key: "b" },
-        ];
 
         source
             .pipe(accumulatorStream)
@@ -357,22 +334,10 @@ test.cb(
             { ts: 6, key: "g" },
         ];
         const firstFlush = [{ ts: 0, key: "a" }];
-        const secondFlush = [
+        const secondFlush = [{ ts: 0, key: "a" }, { ts: 2, key: "c" }];
-            { ts: 0, key: "a" },
+        const thirdFlush = [{ ts: 2, key: "c" }, { ts: 3, key: "d" }];
-            { ts: 2, key: "c" },
+        const fourthFlush = [{ ts: 3, key: "d" }, { ts: 5, key: "f" }];
-        ];
+        const fifthFlush = [{ ts: 5, key: "f" }, { ts: 6, key: "g" }];
-        const thirdFlush = [
-            { ts: 2, key: "c" },
-            { ts: 3, key: "d" },
-        ];
-        const fourthFlush = [
-            { ts: 3, key: "d" },
-            { ts: 5, key: "f" },
-        ];
-        const fifthFlush = [
-            { ts: 5, key: "f" },
-            { ts: 6, key: "g" },
-        ];
 
         const flushes = [
             firstFlush,
@@ -504,10 +469,7 @@ test.cb("accumulatorBy() sliding", t => {
         { ts: 6, key: "g" },
     ];
     const firstFlush = [{ ts: 0, key: "a" }];
-    const secondFlush = [
+    const secondFlush = [{ ts: 0, key: "a" }, { ts: 1, key: "b" }];
-        { ts: 0, key: "a" },
-        { ts: 1, key: "b" },
-    ];
     const thirdFlush = [
         { ts: 0, key: "a" },
         { ts: 1, key: "b" },
@@ -518,14 +480,8 @@ test.cb("accumulatorBy() sliding", t => {
         { ts: 2, key: "c" },
         { ts: 3, key: "d" },
     ];
-    const fifthFlush = [
+    const fifthFlush = [{ ts: 3, key: "d" }, { ts: 5, key: "f" }];
-        { ts: 3, key: "d" },
+    const sixthFlush = [{ ts: 5, key: "f" }, { ts: 6, key: "g" }];
-        { ts: 5, key: "f" },
-    ];
-    const sixthFlush = [
-        { ts: 5, key: "f" },
-        { ts: 6, key: "g" },
-    ];
 
     const flushes = [
         firstFlush,

tests/batch.spec.ts

@@ -1,7 +1,8 @@
 import { Readable } from "stream";
 import test from "ava";
 import { expect } from "chai";
-import { batch, map, fromArray } from "../src";
+import mhysa from "../src";
+const { batch, map, fromArray } = mhysa({ objectMode: true });
 
 test.cb("batch() batches chunks together", t => {
     t.plan(3);
@@ -38,7 +39,7 @@ test.cb("batch() yields a batch after the timeout", t => {
     const expectedElements = [["a", "b"], ["c"], ["d"]];
     let i = 0;
     source
-        .pipe(batch(3, 500))
+        .pipe(batch(3))
         .on("data", (element: string[]) => {
             t.deepEqual(element, expectedElements[i]);
             i++;

tests/child.spec.ts

@@ -2,7 +2,8 @@ import * as cp from "child_process";
 import { Readable } from "stream";
 import test from "ava";
 import { expect } from "chai";
-import { child } from "../src";
+import mhysa from "../src";
+const { child } = mhysa();
 
 test.cb(
     "child() allows easily writing to child process stdin and reading from its stdout",

tests/collect.spec.ts

@@ -1,7 +1,8 @@
 import { Readable } from "stream";
 import test from "ava";
 import { expect } from "chai";
-import { collect } from "../src";
+import mhysa from "../src";
+const { collect } = mhysa();
 
 test.cb(
     "collect() collects streamed elements into an array (object, flowing mode)",
@@ -58,7 +59,7 @@ test.cb(
         const source = new Readable({ objectMode: false });
 
         source
-            .pipe(collect({ objectMode: false }))
+            .pipe(collect())
             .on("data", collected => {
                 expect(collected).to.deep.equal(Buffer.from("abc"));
                 t.pass();

tests/compose.spec.ts

@@ -2,8 +2,9 @@ import * as test from "ava";
 import { expect } from "chai";
 import { sleep } from "../src/helpers";
 import { Readable, Writable } from "stream";
-import { compose, map, fromArray } from "../src";
+import mhysa from "../src";
 import { performance } from "perf_hooks";
+const { compose, map, fromArray } = mhysa({ objectMode: true });
 
 test.cb("compose() chains two streams together in the correct order", t => {
     t.plan(3);
@@ -113,9 +114,13 @@ test("compose() writable length should be less than highWaterMark when handing w
             return chunk;
         });
 
-        const composed = compose([first, second], undefined, {
+        const composed = compose(
-            highWaterMark: 2,
+            [first, second],
-        });
+            undefined,
+            {
+                highWaterMark: 2,
+            },
+        );
         composed.on("error", err => {
             reject();
         });
@@ -163,9 +168,13 @@ test("compose() should emit drain event ~rate * highWaterMark ms for every write
             return chunk;
         });
 
-        const composed = compose([first, second], undefined, {
+        const composed = compose(
-            highWaterMark,
+            [first, second],
-        });
+            undefined,
+            {
+                highWaterMark,
+            },
+        );
         composed.on("error", err => {
             reject();
         });
@@ -212,9 +221,13 @@ test.cb(
             return chunk;
         });
 
-        const composed = compose([first, second], undefined, {
+        const composed = compose(
-            highWaterMark: 5,
+            [first, second],
-        });
+            undefined,
+            {
+                highWaterMark: 5,
+            },
+        );
 
         composed.on("error", err => {
             t.end(err);
@@ -271,9 +284,13 @@ test.cb(
             { highWaterMark: 1 },
         );
 
-        const composed = compose([first, second], undefined, {
+        const composed = compose(
-            highWaterMark: 5,
+            [first, second],
-        });
+            undefined,
+            {
+                highWaterMark: 5,
+            },
+        );
         composed.on("error", err => {
             t.end(err);
         });
@@ -338,9 +355,13 @@ test.cb(
             { highWaterMark: 2 },
         );
 
-        const composed = compose([first, second], undefined, {
+        const composed = compose(
-            highWaterMark: 5,
+            [first, second],
-        });
+            undefined,
+            {
+                highWaterMark: 5,
+            },
+        );
         composed.on("error", err => {
             t.end(err);
         });
@@ -393,9 +414,13 @@ test.cb(
             return chunk;
         });
 
-        const composed = compose([first, second], undefined, {
+        const composed = compose(
-            highWaterMark: 6,
+            [first, second],
-        });
+            undefined,
+            {
+                highWaterMark: 6,
+            },
+        );
 
         composed.on("error", err => {
             t.end(err);
@@ -445,9 +470,12 @@ test.cb("compose() should be 'destroyable'", t => {
         return chunk;
     });
 
-    const composed = compose([first, second], (err: any) => {
+    const composed = compose(
-        t.pass();
+        [first, second],
-    });
+        (err: any) => {
+            t.pass();
+        },
+    );
 
     const fakeSource = new Readable({
         objectMode: true,
@@ -503,9 +531,13 @@ test.cb("compose() `finish` and `end` propagates", t => {
         return chunk;
     });
 
-    const composed = compose([first, second], undefined, {
+    const composed = compose(
-        highWaterMark: 3,
+        [first, second],
-    });
+        undefined,
+        {
+            highWaterMark: 3,
+        },
+    );
 
     const fakeSource = new Readable({
         objectMode: true,

tests/concat.spec.ts

@@ -1,7 +1,8 @@
 import { Readable } from "stream";
 import test from "ava";
 import { expect } from "chai";
-import { concat, collect } from "../src";
+import mhysa from "../src";
+const { concat, collect } = mhysa();
 
 test.cb(
     "concat() concatenates multiple readable streams (object, flowing mode)",
@@ -171,7 +172,7 @@ test.cb(
 test.cb("concat() concatenates empty list of readable streams", t => {
     t.plan(0);
     concat()
-        .pipe(collect({ objectMode: false }))
+        .pipe(collect())
         .on("data", _ => {
             t.fail();
         })

tests/defaultOptions.spec.ts

@@ -1,30 +1,21 @@
 import { Readable } from "stream";
 import test from "ava";
-import { batch as _batch, instance as strom } from "../src";
+import mhysa from "../src";
 
-const withDefaultOptions = strom({ objectMode: false });
+const withDefaultOptions = mhysa({ objectMode: true });
+const withoutOptions = mhysa();
 
-test("strom instances can have default options", t => {
+test("Mhysa instances can have default options", t => {
     let batch = withDefaultOptions.batch();
-    t.false(batch._readableState.objectMode);
+    t.true(batch._readableState.objectMode);
-    t.false(batch._writableState.objectMode);
+    t.true(batch._writableState.objectMode);
     batch = withDefaultOptions.batch(3);
-    t.false(batch._readableState.objectMode);
+    t.true(batch._readableState.objectMode);
-    t.false(batch._writableState.objectMode);
+    t.true(batch._writableState.objectMode);
     batch = withDefaultOptions.batch(3, 1);
-    t.false(batch._readableState.objectMode);
-    t.false(batch._writableState.objectMode);
-    batch = withDefaultOptions.batch(3, 1, { objectMode: true });
     t.true(batch._readableState.objectMode);
     t.true(batch._writableState.objectMode);
-
+    batch = withDefaultOptions.batch(3, 1, { objectMode: false });
-    batch = _batch(3);
-    t.true(batch._readableState.objectMode);
-    t.true(batch._writableState.objectMode);
-    batch = _batch(3, 1);
-    t.true(batch._readableState.objectMode);
-    t.true(batch._writableState.objectMode);
-    batch = _batch(3, 1, { objectMode: false });
     t.false(batch._readableState.objectMode);
     t.false(batch._writableState.objectMode);
 });

tests/demux.spec.ts

@@ -1,10 +1,11 @@
 import test from "ava";
 import { expect } from "chai";
-import { demux, map, fromArray } from "../src";
+import mhysa from "../src";
 import { Writable, Readable } from "stream";
-import * as sinon from "sinon";
+const sinon = require("sinon");
-import { sleep } from "../src/helpers";
+const { sleep } = require("../src/helpers");
 import { performance } from "perf_hooks";
+const { demux, map, fromArray } = mhysa({ objectMode: true });
 
 interface Test {
     key: string;
@@ -861,3 +862,39 @@ test.cb("demux() should be 'destroyable'", t => {
     fakeSource.push(input[3]);
     fakeSource.push(input[4]);
 });
+
+test.cb("Should delete idle pipelines", t => {
+    t.plan(5);
+    const input = [
+        { key: "a", visited: [] },
+        { key: "b", visited: [] },
+        { key: "b", visited: [] },
+        { key: "a", visited: [] },
+        { key: "b", visited: [] },
+        { key: "c", visited: [] },
+    ];
+    const construct = sinon.spy((destKey: string) => {
+        const dest = map((chunk: Test) => {
+            chunk.visited.push(1);
+            return chunk;
+        });
+        t.pass();
+
+        return dest;
+    });
+
+    const demuxed = demux(construct, "key", {
+        maxIdleTime: 110,
+        purgeIdleInterval: 110,
+    });
+
+    demuxed.on("data", data => {
+        if (data.key === "c") t.end();
+    });
+
+    for (let i = 0; i < input.length; i++) {
+        setTimeout(() => {
+            demuxed.write(input[i]);
+        }, i * 100);
+    }
+});

tests/duplex.spec.ts

@@ -2,7 +2,8 @@ import * as cp from "child_process";
 import { Readable } from "stream";
 import test from "ava";
 import { expect } from "chai";
-import { duplex } from "../src";
+import mhysa from "../src";
+const { duplex } = mhysa();
 
 test.cb(
     "duplex() combines a writable and readable stream into a ReadWrite stream",

tests/filter.spec.ts

@@ -1,7 +1,8 @@
 import test from "ava";
 import { expect } from "chai";
 import { Readable } from "stream";
-import { filter } from "../src";
+import mhysa from "../src";
+const { filter } = mhysa();
 
 test.cb("filter() filters elements synchronously", t => {
     t.plan(2);

tests/flatMap.spec.ts

@@ -1,7 +1,8 @@
 import { Readable } from "stream";
 import test from "ava";
 import { expect } from "chai";
-import { flatMap } from "../src";
+import mhysa from "../src";
+const { flatMap } = mhysa({ objectMode: true });
 
 test.cb("flatMap() maps elements synchronously", t => {
     t.plan(6);

tests/fromArray.spec.ts

@@ -1,6 +1,7 @@
 import test from "ava";
 import { expect } from "chai";
-import { fromArray } from "../src";
+import mhysa from "../src";
+const { fromArray } = mhysa();
 
 test.cb("fromArray() streams array elements in flowing mode", t => {
     t.plan(3);

tests/join.spec.ts

@@ -1,7 +1,8 @@
 import { Readable } from "stream";
 import test from "ava";
 import { expect } from "chai";
-import { join } from "../src";
+import mhysa from "../src";
+const { join } = mhysa();
 
 test.cb("join() joins chunks using the specified separator", t => {
     t.plan(9);

tests/last.spec.ts

@@ -1,7 +1,8 @@
 import { Readable } from "stream";
 import test from "ava";
 import { expect } from "chai";
-import { last } from "../src";
+import mhysa from "../src";
+const { last } = mhysa();
 
 test("last() resolves to the last chunk streamed by the given readable stream", async t => {
     const source = new Readable({ objectMode: true });

tests/map.spec.ts

@@ -1,7 +1,8 @@
 import { Readable } from "stream";
 import test from "ava";
 import { expect } from "chai";
-import { map } from "../src";
+import mhysa from "../src";
+const { map } = mhysa();
 
 test.cb("map() maps elements synchronously", t => {
     t.plan(3);

tests/merge.spec.ts

@@ -1,7 +1,8 @@
 import { Readable } from "stream";
 import test from "ava";
 import { expect } from "chai";
-import { merge } from "../src";
+import mhysa from "../src";
+const { merge } = mhysa();
 
 test.cb(
     "merge() merges multiple readable streams in chunk arrival order",

tests/parallelMap.spec.ts

@@ -2,8 +2,9 @@ import { Readable } from "stream";
 import { performance } from "perf_hooks";
 import test from "ava";
 import { expect } from "chai";
-import { parallelMap } from "../src";
+import mhysa from "../src";
 import { sleep } from "../src/helpers";
+const { parallelMap } = mhysa({ objectMode: true });
 
 test.cb("parallelMap() parallel mapping", t => {
     t.plan(6);

tests/parse.spec.ts

@@ -1,7 +1,8 @@
 import { Readable, finished } from "stream";
 import test from "ava";
 import { expect } from "chai";
-import { parse } from "../src";
+import mhysa from "../src";
+const { parse } = mhysa();
 
 test.cb("parse() parses the streamed elements as JSON", t => {
     t.plan(3);

tests/rate.spec.ts

@@ -1,11 +1,12 @@
 import { Readable } from "stream";
 import { performance } from "perf_hooks";
 import test from "ava";
-import { rate } from "../src";
+import { expect } from "chai";
-import { sleep } from "../src/helpers";
+import mhysa from "../src";
+const { rate } = mhysa({ objectMode: true });
 
 test.cb("rate() sends data at a rate of 150", t => {
-    t.plan(15);
+    t.plan(5);
     const targetRate = 150;
     const source = new Readable({ objectMode: true });
     const expectedElements = ["a", "b", "c", "d", "e"];
@@ -14,10 +15,10 @@ test.cb("rate() sends data at a rate of 150", t => {
 
     source
         .pipe(rate(targetRate))
-        .on("data", (element: string) => {
+        .on("data", (element: string[]) => {
             const currentRate = (i / (performance.now() - start)) * 1000;
-            t.is(element, expectedElements[i]);
+            expect(element).to.deep.equal(expectedElements[i]);
-            t.true(currentRate <= targetRate);
+            expect(currentRate).lessThan(targetRate);
             t.pass();
             i++;
         })
@@ -33,7 +34,7 @@ test.cb("rate() sends data at a rate of 150", t => {
 });
 
 test.cb("rate() sends data at a rate of 50", t => {
-    t.plan(15);
+    t.plan(5);
     const targetRate = 50;
     const source = new Readable({ objectMode: true });
     const expectedElements = ["a", "b", "c", "d", "e"];
@@ -42,10 +43,10 @@ test.cb("rate() sends data at a rate of 50", t => {
 
     source
         .pipe(rate(targetRate))
-        .on("data", (element: string) => {
+        .on("data", (element: string[]) => {
             const currentRate = (i / (performance.now() - start)) * 1000;
-            t.is(element, expectedElements[i]);
+            expect(element).to.deep.equal(expectedElements[i]);
-            t.true(currentRate <= targetRate);
+            expect(currentRate).lessThan(targetRate);
             t.pass();
             i++;
         })
@@ -61,7 +62,7 @@ test.cb("rate() sends data at a rate of 50", t => {
 });
 
 test.cb("rate() sends data at a rate of 1", t => {
-    t.plan(15);
+    t.plan(5);
     const targetRate = 1;
     const source = new Readable({ objectMode: true });
     const expectedElements = ["a", "b", "c", "d", "e"];
@@ -70,10 +71,10 @@ test.cb("rate() sends data at a rate of 1", t => {
 
     source
         .pipe(rate(targetRate))
-        .on("data", (element: string) => {
+        .on("data", (element: string[]) => {
             const currentRate = (i / (performance.now() - start)) * 1000;
-            t.is(element, expectedElements[i]);
+            expect(element).to.deep.equal(expectedElements[i]);
-            t.true(currentRate <= targetRate);
+            expect(currentRate).lessThan(targetRate);
             t.pass();
             i++;
         })
@@ -87,41 +88,3 @@ test.cb("rate() sends data at a rate of 1", t => {
     source.push("e");
     source.push(null);
 });
-
-test("rate() sends data at a rate of 1 and drops extra messages", async t => {
-    t.plan(9);
-    const targetRate = 1;
-    const source = new Readable({
-        objectMode: true,
-        read: () => {
-            return;
-        },
-    });
-    const expectedElements = ["a", "b", "e"];
-    const start = performance.now();
-    let i = 0;
-
-    let plan = 0;
-    source
-        .pipe(rate(targetRate, 1, { behavior: 1 }))
-        .on("data", (element: string) => {
-            const currentRate = (i / (performance.now() - start)) * 1000;
-            t.is(element, expectedElements[i]);
-            t.true(currentRate <= targetRate);
-            plan++;
-            t.pass();
-            i++;
-        })
-        .on("error", t.fail)
-        .on("end", t.fail);
-
-    source.push("a");
-    await sleep(1000);
-    source.push("b");
-    source.push("c");
-    source.push("d");
-    await sleep(1000);
-    source.push("e");
-    await sleep(1000);
-    source.push(null);
-});

tests/reduce.spec.ts

@@ -1,7 +1,8 @@
 import { Readable } from "stream";
 import test from "ava";
 import { expect } from "chai";
-import { reduce } from "../src";
+import mhysa from "../src";
+const { reduce } = mhysa({ objectMode: true });
 
 test.cb("reduce() reduces elements synchronously", t => {
     t.plan(1);

tests/replace.spec.ts

@@ -1,7 +1,8 @@
 import { Readable } from "stream";
 import test from "ava";
 import { expect } from "chai";
-import { replace } from "../src";
+import mhysa from "../src";
+const { replace } = mhysa();
 
 test.cb(
     "replace() replaces occurrences of the given string in the streamed elements with the specified " +

tests/split.spec.ts

@@ -1,7 +1,8 @@
 import { Readable } from "stream";
 import test from "ava";
 import { expect } from "chai";
-import { split } from "../src";
+import mhysa from "../src";
+const { split } = mhysa();
 
 test.cb("split() splits chunks using the default separator (\\n)", t => {
     t.plan(5);

tests/stringify.spec.ts

@@ -1,7 +1,8 @@
 import { Readable } from "stream";
 import test from "ava";
 import { expect } from "chai";
-import { stringify } from "../src";
+import mhysa from "../src";
+const { stringify } = mhysa();
 
 test.cb("stringify() stringifies the streamed elements as JSON", t => {
     t.plan(4);

tests/unbatch.spec.ts

@@ -1,7 +1,8 @@
 import { Readable } from "stream";
 import test from "ava";
 import { expect } from "chai";
-import { unbatch, batch } from "../src";
+import mhysa from "../src";
+const { unbatch, batch } = mhysa({ objectMode: true });
 
 test.cb("unbatch() unbatches", t => {
     t.plan(3);

tests/utils/collected.spec.ts

@@ -1,6 +1,7 @@
 import test from "ava";
 import { collected } from "../../src/utils";
-import { fromArray, collect } from "../../src";
+import mhysa from "../../src";
+const { fromArray, collect } = mhysa({ objectMode: true });
 
 test("collected returns a promise for the first data point", async t => {
     const data = collected(fromArray([1, 2, 3, 4]).pipe(collect()));

yarn.lock

@@ -1934,6 +1934,9 @@ merge2@^1.2.3, merge2@^1.3.0:
   resolved "https://npm.dev.jogogo.co/merge2/-/merge2-1.3.0.tgz#5b366ee83b2f1582c48f87e47cf1a9352103ca81"
   integrity sha512-2j4DAdlBOkiSZIsaXk4mTE3sRS02yBHAtfy127xRV3bQUFqXkjHCHLW6Scv7DwNRbIWNHH8zpnz9zMaKXIdvYw==
 
+mhysa@./:
+  version "2.0.0-alpha.1"
+
 micromatch@^4.0.2:
   version "4.0.2"
   resolved "https://npm.dev.jogogo.co/micromatch/-/micromatch-4.0.2.tgz#4fcb0999bf9fbc2fcbdd212f6d629b9a56c39259"
@@ -2716,9 +2719,6 @@ strip-json-comments@~2.0.1:
   resolved "https://registry.yarnpkg.com/strip-json-comments/-/strip-json-comments-2.0.1.tgz#3c531942e908c2697c0ec344858c286c7ca0a60a"
   integrity sha1-PFMZQukIwml8DsNEhYwobHygpgo=
 
-stromjs@./:
-  version "0.5.1"
-
 supertap@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/supertap/-/supertap-1.0.0.tgz#bd9751c7fafd68c68cf8222a29892206a119fa9e"