Add basic tests for decodeArrayStream (#44)

* Add basic tests for decodeArrayStream

* Fix test

Author: sergeyzenchenko

test/decodeArrayStream.test.ts

@@ -0,0 +1,57 @@
+import assert from "assert";
+import { encode, decodeAsync, decodeArrayStream } from "../src";
+
+describe("decodeArrayStream", () => {
+  const generateSampleObject = () => {
+    return {
+      id: Math.random(),
+      name: "test",
+    };
+  };
+
+  const createStream = async function*(object: any) {
+    for (const byte of encode(object)) {
+      yield [byte];
+    }
+  };
+
+  it("decodes numbers array", async () => {
+    const object = [1, 2, 3, 4, 5];
+
+    const result = [];
+
+    for await (let item of decodeArrayStream(createStream(object))) {
+      result.push(item);
+    }
+
+    assert.deepStrictEqual(object, result);
+  });
+
+  it("decodes objects array", async () => {
+    const objectsArrays: Array<any> = [];
+
+    for (let i = 0; i < 10; i++) {
+      objectsArrays.push(generateSampleObject());
+    }
+
+    const result = [];
+
+    for await (let item of decodeArrayStream(createStream(objectsArrays))) {
+      result.push(item);
+    }
+
+    assert.deepStrictEqual(objectsArrays, result);
+  });
+
+  it("fails for non array input", async () => {
+    const object = "demo";
+
+    await assert.rejects(async () => {
+      const result = [];
+
+      for await (let item of decodeArrayStream(createStream(object))) {
+        result.push(item);
+      }
+    }, /.*Unrecognized array type byte:.*/i);
+  });
+});