feat(zen-push): adding types for zen-push (#20476)

types/zen-push/index.d.ts

@@ -0,0 +1,16 @@
+// Type definitions for zen-push 0.1
+// Project: https://github.com/zenparsing/zen-push
+// Definitions by: daprahamian <https://github.com/daprahamian>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+import * as Observable from 'zen-observable';
+
+declare class PushStream<T> {
+    readonly observable: Observable<T>;
+    readonly observed: number;
+    next(x: T): void;
+    error(e: Error): void;
+    complete(x?: any): void;
+}
+
+export default PushStream;

types/zen-push/tsconfig.json

@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "zen-push-tests.ts"
+    ]
+}

types/zen-push/tslint.json

@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }

types/zen-push/zen-push-tests.ts

@@ -0,0 +1,21 @@
+import PushStream from 'zen-push';
+import * as Observable from 'zen-observable';
+
+function assert(val: boolean) {
+    if (!val) {
+        throw new Error('Assertion Failure');
+    }
+}
+
+const stream1 = new PushStream<number>();
+
+assert(stream1.observable instanceof Observable);
+assert(typeof stream1.observed === 'number');
+
+stream1.next(15);
+
+stream1.next(23);
+
+stream1.error(new Error('test 123'));
+
+stream1.complete();