Provide a way to add more matchers in a spec or suite without affecting later specs or suites.

spec/suites/SpecRunningTest.js

@@ -728,4 +728,36 @@ describe("jasmine spec running", function () {
 
     expect(exceptionMessage).toEqual('explodes function should not have been called');
   });
+
+  it("should be easy to add more matchers local to a spec, suite, etc.", function() {
+    var spec1, spec2, spec1Matcher, spec2Matcher;
+
+    var suite = env.describe('some suite', function() {
+      env.beforeEach(function() {
+        this.addMatchers({ matcherForSuite: function(expected) {
+          return "matcherForSuite: actual: " + this.actual + "; expected: " + expected;
+        } });
+      });
+
+      spec1 = env.it('spec with an expectation').runs(function () {
+        this.addMatchers( { matcherForSpec: function(expected) {
+          return "matcherForSpec: actual: " + this.actual + "; expected: " + expected;
+        } });
+        spec1Matcher = this.expect("xxx");
+      });
+
+      spec2 = env.it('spec with failing expectation').runs(function () {
+        spec2Matcher = this.expect("yyy");
+      });
+    });
+
+    suite.execute();
+
+    expect(spec1Matcher.matcherForSuite("expected")).toEqual("matcherForSuite: actual: xxx; expected: expected");
+    expect(spec1Matcher.matcherForSpec("expected")).toEqual("matcherForSpec: actual: xxx; expected: expected");
+
+    expect(spec2Matcher.matcherForSuite("expected")).toEqual("matcherForSuite: actual: yyy; expected: expected");
+    expect(spec2Matcher.matcherForSpec).toBe(undefined);
+  });
+
 });