Resolve remaining test issues

spec/core/ObjectContainingSpec.js

@@ -9,7 +9,9 @@ describe("ObjectContaining", function() {
   it("does not match an empty object actual", function() {
     var containing = new j$.ObjectContaining("foo");
 
-    expect(containing.jasmineMatches({})).toBe(false);
+    expect(function() {
+      containing.jasmineMatches({})
+    }).toThrowError(/not 'foo'/)
   });
 
   it("matches when the key/value pair is present in the actual", function() {
@@ -39,10 +41,21 @@ describe("ObjectContaining", function() {
     containing.jasmineMatches({foo: "fooVal", bar: "barVal"}, mismatchKeys, mismatchValues);
     
     expect(mismatchValues.length).toBe(1);
-    
     expect(mismatchValues[0]).toEqual("'foo' was 'fooVal' in actual, but was 'other' in expected.");
   });
 
+  it("adds keys in expected but not actual to the mismatchKeys parameter", function() {
+    var containing = new j$.ObjectContaining({foo: "fooVal"});
+
+    var mismatchKeys = [];
+    var mismatchValues = [];
+
+    containing.jasmineMatches({bar: "barVal"}, mismatchKeys, mismatchValues);
+
+    expect(mismatchKeys.length).toBe(1);
+    expect(mismatchKeys[0]).toEqual("expected has key 'foo', but missing from actual.");
+  });
+
   it("jasmineToString's itself", function() {
     var containing = new j$.ObjectContaining({});