old_contents: describe("My demo suite", function() {
  	it("contains spec with my demo expectation", function() {
  		expect(1).toBe(1);
  	});
  });
  
  describe("My suite is just a function", function() {
  	var a = false;
  	
  	it("and so is a spec", function(){
  		expect(a).toBe(false);
  	});
  	
  	it("the spec is using not matcher", function() {
  		expect(a).not.toBe(true);
  		expect(a).not.toBe(null);
  	});
  });
  
  describe("My suite on toBe", function() {
  	it("also work for object", function() {
  		var person = {
  			name: "Philip",
  			age: 36
  		};
  		
  		var me = {
  			name: "Philip",
  			age: 36
  		};
  		
  		expect(person).toEqual(me);
  	});
  	
  	it("works for regular expressions the same", function(){
  		var msg = "philip cen dai";
  		
  		expect(msg).toMatch(/cen/);
  		expect(msg).toMatch(/Dai$/i);
  		expect(msg).not.toMatch(/developer/);
  	});
  	
  	it("Test on 'toBeDefined' matcher compare against 'undefined'", function() {
  		var a = {
  			foo: "foo"
  		};
  		
  		expect(a.foo).toBeDefined();
  		expect(a.bar).toBeUndefined();
  
  	});
  	
  	it("Test on 'toBeNull' matcher compare against null", function() {
  		var a = null;
  		var foo = "foo";
  		
  		expect(null).toBeNull();
  		expect(a).toBeNull();
  		expect(foo).not.toBeNull();
  	});
  	
  	it("Test on 'toBeTruthy'", function() {
  		var a, me = "Philip Dai"
  		expect(me).toBeTruthy();
  		expect(a).not.toBeTruthy();
  	});
  });
  
new_contents: describe("My demo suite", function() {
  	it("contains spec with my demo expectation", function() {
  		expect(1).toBe(1);
  	});
  });
  
  describe("My suite is just a function", function() {
  	var a = false;
  	
  	it("and so is a spec", function(){
  		expect(a).toBe(false);
  	});
  	
  	it("the spec is using not matcher", function() {
  		expect(a).not.toBe(true);
  		expect(a).not.toBe(null);
  	});
  });
  
  describe("My suite on toBe", function() {
  	it("also work for object", function() {
  		var person = {
  			name: "Philip",
  			age: 36
  		};
  		
  		var me = {
  			name: "Philip",
  			age: 36
  		};
  		
  		expect(person).toEqual(me);
  	});
  	
  	it("works for regular expressions the same", function(){
  		var msg = "philip cen dai";
  		
  		expect(msg).toMatch(/cen/);
  		expect(msg).toMatch(/Dai$/i);
  		expect(msg).not.toMatch(/developer/);
  	});
  	
  	it("Test on 'toBeDefined' matcher compare against 'undefined'", function() {
  		var a = {
  			foo: "foo"
  		};
  		
  		expect(a.foo).toBeDefined();
  		expect(a.bar).toBeUndefined();
  
  	});
  	
  	it("Test on 'toBeNull' matcher compare against null", function() {
  		var a = null;
  		var foo = "foo";
  		
  		expect(null).toBeNull();
  		expect(a).toBeNull();
  		expect(foo).not.toBeNull();
  	});
  	
  	it("Test on 'toBeTruthy'", function() {
  		var a, me = "Philip Dai";
  		expect(me).toBeTruthy();
  		expect(a).not.toBeTruthy();
  	});
  	
  	it("Test on 'toBeFalsy'", function() {
  		var a, me = "Philip Dai";
  		expect(a).toBeFalsy();
  		expect(me).not.toBeFalsy();
  	});
  });
  
subject: Test on toBeFalsy