Add asymmetric equality tester to match a string against a regexp

- Also move the asymmetric testers into their own dir for easier
  locating.

[#58120558] Fix #243

spec/core/asymmetric_equality/AnythingSpec.js

@@ -0,0 +1,38 @@
+describe("Anything", function() {
+  it("matches a string", function() {
+    var anything = new j$.Anything();
+
+    expect(anything.asymmetricMatch('foo')).toBe(true);
+  });
+
+  it("matches a number", function() {
+    var anything = new j$.Anything();
+
+    expect(anything.asymmetricMatch(42)).toBe(true);
+  });
+
+  it("matches an object", function() {
+    var anything = new j$.Anything();
+
+    expect(anything.asymmetricMatch({ foo: 'bar' })).toBe(true);
+  });
+
+  it("matches an array", function() {
+    var anything = new j$.Anything();
+
+    expect(anything.asymmetricMatch([1,2,3])).toBe(true);
+  });
+
+  it("doesn't match undefined", function() {
+    var anything = new j$.Anything();
+
+    expect(anything.asymmetricMatch()).toBe(false);
+    expect(anything.asymmetricMatch(undefined)).toBe(false);
+  });
+
+  it("doesn't match null", function() {
+    var anything = new j$.Anything();
+
+    expect(anything.asymmetricMatch(null)).toBe(false);
+  });
+});