Add arrayWithExactContents asymmetric matcher

- Fixes #817

spec/core/asymmetric_equality/ArrayWithExactContentsSpec.js

@@ -0,0 +1,47 @@
+describe("ArrayWithExactContents", function() {
+  it("matches an array with the same items in a different order", function() {
+    var matcher = new jasmineUnderTest.ArrayWithExactContents(['a', 2, /a/]);
+
+    expect(matcher.asymmetricMatch([2, 'a', /a/])).toBe(true);
+  });
+
+  it("does not work when not passed an array", function() {
+    var matcher = new jasmineUnderTest.ArrayWithExactContents("foo");
+
+    expect(function() {
+      matcher.asymmetricMatch([]);
+    }).toThrowError(/not 'foo'/);
+  });
+
+  it("does not match when an item is missing", function() {
+    var matcher = new jasmineUnderTest.ArrayWithExactContents(['a', 2, /a/]);
+
+    expect(matcher.asymmetricMatch(['a', 2])).toBe(false);
+    expect(matcher.asymmetricMatch(['a', 2, undefined])).toBe(false);
+  });
+
+  it("does not match when there is an extra item", function() {
+    var matcher = new jasmineUnderTest.ArrayWithExactContents(['a']);
+
+    expect(matcher.asymmetricMatch(['a', 2])).toBe(false);
+  });
+
+  it("jasmineToStrings itself", function() {
+    var matcher = new jasmineUnderTest.ArrayWithExactContents([]);
+
+    expect(matcher.jasmineToString()).toMatch("<jasmine.arrayWithExactContents");
+  });
+
+  it("uses custom equality testers", function() {
+    var tester = function(a, b) {
+      // All "foo*" strings match each other.
+      if (typeof a == "string" && typeof b == "string" &&
+          a.substr(0, 3) == "foo" && b.substr(0, 3) == "foo") {
+        return true;
+      }
+    };
+    var matcher = new jasmineUnderTest.ArrayWithExactContents(["fooVal"]);
+
+    expect(matcher.asymmetricMatch(["fooBar"], [tester])).toBe(true);
+  });
+});