Changed audio-frame-header-bug test file into test-code-file for gene…

…ric MP3 parsing tests.

Related to #64

test/test-mp3.ts

@@ -0,0 +1,27 @@
+import {} from "mocha";
+import {assert} from 'chai';
+import * as mm from '../src';
+import * as path from 'path';
+
+const t = assert;
+
+describe("Parse MP3 files", () => {
+
+  it("should handle audio-frame-header-bug", function() {
+
+    this.timeout(15000); // It takes a long time to parse
+
+    const filePath = path.join(__dirname, 'samples', 'audio-frame-header-bug.mp3');
+
+    return mm.parseFile(filePath, {duration: true}).then(result => {
+      // FooBar: 3:20.556 (8.844.527 samples); 44100 Hz => 200.5561678004535 seconds
+      // t.strictEqual(result.format.duration, 200.59591666666665); // previous
+      // t.strictEqual(result.format.duration, 200.5561678004535); // FooBar
+
+      // If MPEG Layer II is accepted, it will give back third frame with a different frame length;
+      // therefore it start counting actual parsable frames ending up on ~66.86
+      t.strictEqual(result.format.duration, 66.8647619047619);
+    });
+  });
+
+});