Show diffs involving root-level asymmetric equality testers

* Fixes #1831

lib/jasmine-core/jasmine.js

@@ -4472,12 +4472,7 @@ getJasmineRequireObj().DiffBuilder = function (j$) {
   };
 
   function dereferencePath(objectPath, actual, expected, pp) {
-    var i, asymmetricResult;
-
-    for (i = 0; i < objectPath.components.length; i++) {
-      actual = actual[objectPath.components[i]];
-      expected = expected[objectPath.components[i]];
-
+    function handleAsymmetricExpected() {
       if (j$.isAsymmetricEqualityTester_(expected) && j$.isFunction_(expected.valuesForDiff_)) {
         var asymmetricResult = expected.valuesForDiff_(actual, pp);
         expected = asymmetricResult.self;
@@ -4485,6 +4480,15 @@ getJasmineRequireObj().DiffBuilder = function (j$) {
       }
     }
 
+    var i;
+    handleAsymmetricExpected();
+
+    for (i = 0; i < objectPath.components.length; i++) {
+      actual = actual[objectPath.components[i]];
+      expected = expected[objectPath.components[i]];
+      handleAsymmetricExpected();
+    }
+
     return {actual: actual, expected: expected};
   }
 

spec/core/asymmetric_equality/ObjectContainingSpec.js

@@ -149,7 +149,7 @@ describe("ObjectContaining", function() {
         });
       });
 
-      it("includes keys that are present in only sample", function() {
+      it("includes keys that are present only in sample", function() {
         var sample = {a: 1, b: 2},
           other = {a: 3},
           containing = new jasmineUnderTest.ObjectContaining(sample),

spec/core/matchers/DiffBuilderSpec.js

@@ -133,4 +133,50 @@ describe("DiffBuilder", function () {
 
     expect(diffBuilder.getMessage()).toEqual(expectedMsg);
   });
+
+  it('builds diffs involving asymmetric equality testers that implement valuesForDiff_ at the root', function() {
+    var prettyPrinter = jasmineUnderTest.makePrettyPrinter([]),
+      diffBuilder = new jasmineUnderTest.DiffBuilder({prettyPrinter: prettyPrinter}),
+      expectedMsg = 'Expected $.foo = 1 to equal 2.\n' +
+      "Expected $.baz = undefined to equal 3.";
+
+
+    diffBuilder.setRoots(
+      {foo: 1, bar: 2},
+      jasmine.objectContaining({foo: 2, baz: 3})
+    );
+
+    diffBuilder.withPath('foo', function() {
+      diffBuilder.recordMismatch();
+    });
+    diffBuilder.withPath('baz', function() {
+      diffBuilder.recordMismatch();
+    });
+
+    expect(diffBuilder.getMessage()).toEqual(expectedMsg);
+  });
+
+  it('builds diffs involving asymmetric equality testers that implement valuesForDiff_ below the root', function() {
+    var prettyPrinter = jasmineUnderTest.makePrettyPrinter([]),
+      diffBuilder = new jasmineUnderTest.DiffBuilder({prettyPrinter: prettyPrinter}),
+      expectedMsg = 'Expected $.x.foo = 1 to equal 2.\n' +
+        "Expected $.x.baz = undefined to equal 3.";
+
+
+    diffBuilder.setRoots(
+      {x: {foo: 1, bar: 2}},
+      {x: jasmine.objectContaining({foo: 2, baz: 3})}
+    );
+
+    diffBuilder.withPath('x', function() {
+      diffBuilder.withPath('foo', function () {
+        diffBuilder.recordMismatch();
+      });
+      diffBuilder.withPath('baz', function () {
+        diffBuilder.recordMismatch();
+      });
+    });
+
+    expect(diffBuilder.getMessage()).toEqual(expectedMsg);
+  });
 });

spec/core/matchers/toEqualSpec.js

@@ -429,17 +429,30 @@ describe("toEqual", function() {
     expect(compareEquals(actual, expected).message).toEqual(message);
   });
 
-  it("reports mismatches involving objectContaining and an object", function() {
-    var actual = {x: {a: 1, b: 4, c: 3, extra: 'ignored'}};
-    var expected = {x: jasmineUnderTest.objectContaining({a: 1, b: 2, c: 3})};
-    expect(compareEquals(actual, expected).message).toEqual('Expected $.x.b = 4 to equal 2.');
+  it('reports mismatches between an object and objectContaining', function() {
+    var actual = {a: 1, b: 4, c: 3, extra: 'ignored'};
+    var expected = jasmineUnderTest.objectContaining({a: 1, b: 2, c: 3, d: 4});
+    expect(compareEquals(actual, expected).message)
+      .toEqual(
+        'Expected $.b = 4 to equal 2.\n' +
+        'Expected $.d = undefined to equal 4.'
+      );
   });
 
   it("reports mismatches between a non-object and objectContaining", function() {
-    var actual = {x: 1};
-    var expected = {x: jasmineUnderTest.objectContaining({a: 1})};
+    var actual = 1;
+    var expected = jasmineUnderTest.objectContaining({a: 1});
     expect(compareEquals(actual, expected).message).toEqual(
-      "Expected $.x = 1 to equal '<jasmine.objectContaining(Object({ a: 1 }))>'."
+      "Expected 1 to equal '<jasmine.objectContaining(Object({ a: 1 }))>'."
+    );
+  });
+
+  it("reports mismatches involving a nested objectContaining", function() {
+    var actual = {x: {a: 1, b: 4, c: 3, extra: 'ignored'}};
+    var expected = {x: jasmineUnderTest.objectContaining({a: 1, b: 2, c: 3, d: 4})};
+    expect(compareEquals(actual, expected).message).toEqual(
+      'Expected $.x.b = 4 to equal 2.\n' +
+      'Expected $.x.d = undefined to equal 4.'
     );
   });
 

src/core/matchers/DiffBuilder.js

@@ -72,12 +72,7 @@ getJasmineRequireObj().DiffBuilder = function (j$) {
   };
 
   function dereferencePath(objectPath, actual, expected, pp) {
-    var i, asymmetricResult;
-
-    for (i = 0; i < objectPath.components.length; i++) {
-      actual = actual[objectPath.components[i]];
-      expected = expected[objectPath.components[i]];
-
+    function handleAsymmetricExpected() {
       if (j$.isAsymmetricEqualityTester_(expected) && j$.isFunction_(expected.valuesForDiff_)) {
         var asymmetricResult = expected.valuesForDiff_(actual, pp);
         expected = asymmetricResult.self;
@@ -85,6 +80,15 @@ getJasmineRequireObj().DiffBuilder = function (j$) {
       }
     }
 
+    var i;
+    handleAsymmetricExpected();
+
+    for (i = 0; i < objectPath.components.length; i++) {
+      actual = actual[objectPath.components[i]];
+      expected = expected[objectPath.components[i]];
+      handleAsymmetricExpected();
+    }
+
     return {actual: actual, expected: expected};
   }