Merge branch 'expect-context'

- Fixes #641

spec/core/ExpectationFilterChainSpec.js

@@ -0,0 +1,113 @@
+describe('ExpectationFilterChain', function() {
+  describe('#addFilter', function() {
+    it('returns a new filter chain with the added filter', function() {
+      var first = jasmine.createSpy('first'),
+        second = jasmine.createSpy('second'),
+        orig = new jasmineUnderTest.ExpectationFilterChain({
+          modifyFailureMessage: first
+        }),
+        added = orig.addFilter({selectComparisonFunc: second});
+
+      added.modifyFailureMessage();
+      expect(first).toHaveBeenCalled();
+      added.selectComparisonFunc();
+      expect(second).toHaveBeenCalled();
+    });
+
+    it('does not modify the original filter chain', function() {
+      var orig = new jasmineUnderTest.ExpectationFilterChain({}),
+        f = jasmine.createSpy('f');
+
+      orig.addFilter({selectComparisonFunc: f});
+
+      orig.selectComparisonFunc();
+      expect(f).not.toHaveBeenCalled();
+    });
+  });
+
+  describe('#selectComparisonFunc', function() {
+    describe('When no filters have #selectComparisonFunc', function() {
+      it('returns undefined', function() {
+        var chain = new jasmineUnderTest.ExpectationFilterChain();
+        chain.addFilter({});
+        expect(chain.selectComparisonFunc()).toBeUndefined();
+      });
+    });
+
+    describe('When some filters have #selectComparisonFunc', function() {
+      it('calls the first filter that has #selectComparisonFunc', function() {
+        var first = jasmine.createSpy('first').and.returnValue('first'),
+          second = jasmine.createSpy('second').and.returnValue('second'),
+          chain = new jasmineUnderTest.ExpectationFilterChain()
+            .addFilter({selectComparisonFunc: first})
+            .addFilter({selectComparisonFunc: second}),
+          matcher = {},
+          result;
+
+        result = chain.selectComparisonFunc(matcher);
+
+        expect(first).toHaveBeenCalledWith(matcher);
+        expect(second).not.toHaveBeenCalled();
+        expect(result).toEqual('first');
+      });
+    });
+  });
+
+  describe('#buildFailureMessage', function() {
+    describe('When no filters have #buildFailureMessage', function() {
+      it('returns undefined', function() {
+        var chain = new jasmineUnderTest.ExpectationFilterChain();
+        chain.addFilter({});
+        expect(chain.buildFailureMessage()).toBeUndefined();
+      });
+    });
+
+    describe('When some filters have #buildFailureMessage', function() {
+      it('calls the first filter that has #buildFailureMessage', function() {
+        var first = jasmine.createSpy('first').and.returnValue('first'),
+          second = jasmine.createSpy('second').and.returnValue('second'),
+          chain = new jasmineUnderTest.ExpectationFilterChain()
+            .addFilter({buildFailureMessage: first})
+            .addFilter({buildFailureMessage: second}),
+          matcherResult = {pass: false},
+          matcherName = 'foo',
+          args = [],
+          util = {},
+          result;
+
+        result = chain.buildFailureMessage(matcherResult, matcherName, args, util);
+
+        expect(first).toHaveBeenCalledWith(matcherResult, matcherName, args, util);
+        expect(second).not.toHaveBeenCalled();
+        expect(result).toEqual('first');
+      });
+    });
+  });
+
+  describe('#modifyFailureMessage', function() {
+    describe('When no filters have #modifyFailureMessage', function() {
+      it('returns the original message', function() {
+        var chain = new jasmineUnderTest.ExpectationFilterChain();
+        chain.addFilter({});
+        expect(chain.modifyFailureMessage('msg')).toEqual('msg');
+      });
+    });
+
+    describe('When some filters have #modifyFailureMessage', function() {
+      it('calls the first filter that has #modifyFailureMessage', function() {
+        var first = jasmine.createSpy('first').and.returnValue('first'),
+          second = jasmine.createSpy('second').and.returnValue('second'),
+          chain = new jasmineUnderTest.ExpectationFilterChain()
+            .addFilter({modifyFailureMessage: first})
+            .addFilter({modifyFailureMessage: second}),
+          result;
+
+        result = chain.modifyFailureMessage('original');
+
+        expect(first).toHaveBeenCalledWith('original');
+        expect(second).not.toHaveBeenCalled();
+        expect(result).toEqual('first');
+      });
+    });
+  });
+});