Added matchers: truthy, falsy, empty and notEmpty

spec/core/asymmetric_equality/FalsySpec.js

@@ -0,0 +1,38 @@
+describe("Falsy", function() {
+    it("is true for an empty string", function() {
+        var falsy = new jasmineUnderTest.Falsy();
+
+        expect(falsy.asymmetricMatch("")).toBe(true);
+        expect(falsy.asymmetricMatch('')).toBe(true);
+        expect(falsy.asymmetricMatch('asdasdad')).toBe(false);
+    });
+
+    it("is false for a number that is 0", function() {
+        var falsy = new jasmineUnderTest.Falsy(Number);
+
+        expect(falsy.asymmetricMatch(1)).toBe(false);
+        expect(falsy.asymmetricMatch(0)).toBe(true);
+        expect(falsy.asymmetricMatch(-23)).toBe(false);
+        expect(falsy.asymmetricMatch(-3.1)).toBe(false);
+    });
+
+    it("is true for a null or undefined", function() {
+        var falsy = new jasmineUnderTest.Falsy(Function);
+
+        expect(falsy.asymmetricMatch(null)).toBe(true);
+        expect(falsy.asymmetricMatch(undefined )).toBe(true);
+    });
+
+    it("is true for NaN", function() {
+        var falsy = new jasmineUnderTest.Falsy(Object);
+
+        expect(falsy.asymmetricMatch(NaN)).toBe(true);
+    });
+
+    it("is true for a false Boolean", function() {
+        var falsy = new jasmineUnderTest.Falsy(Boolean);
+
+        expect(falsy.asymmetricMatch(false)).toBe(true);
+        expect(falsy.asymmetricMatch(true)).toBe(false);
+    });
+});