Add Unittests.

tests/WWGroup.spec.js

@@ -68,6 +68,12 @@ describe("Channel Spec", () => {
 
     let ret = channel.push(buffer);
     expect(ret).toBe(true);
+
+    // Try to write a byte to full channel
+    // , should fail.
+    ret = channel.push(new Uint8Array([1]));
+    expect(ret).toBe(false);
+
     let readData = channel.readData(1023);
     expect(areEqual(buffer, readData))
       .withContext("Data Mismatch")
@@ -96,6 +102,24 @@ describe("Channel Spec", () => {
 
     expect(channel.isEmpty()).toBe(true);
   })
+
+  it("2 Bytes Channel", () => {
+    let channel = new Channel(WW, 2, ArrayBuffer);
+    let buffer = new Uint8Array([3]);
+
+    let ret = channel.push(buffer);
+    expect(ret).toBe(true);
+
+    // Push should be failed cause
+    // there are no more space.
+    ret = channel.push(buffer);
+    expect(ret).toBe(false);
+
+    let data = channel.readData(1);
+    expect(areEqual(buffer, data)).toBe(true);
+    expect(channel.isEmpty()).toBe(true);
+  });
+
 });
 
 describe("H264EncWWGroup Spec", () => {