Breaking: Change .not.property(name, val) behavior

Previously, `expect(obj).not.property(name, val)` would throw an Error
if `obj` didn't have a property named `name`. This change causes the
assertion to pass instead.

lib/chai/core/assertions.js

@@ -835,6 +835,9 @@ module.exports = function (chai, _) {
    *     var obj = { foo: 'bar' };
    *     expect(obj).to.have.property('foo');
    *     expect(obj).to.have.property('foo', 'bar');
+   *     expect(obj).to.not.have.property('baz');
+   *     expect(obj).to.not.have.property('foo', 'baz');
+   *     expect(obj).to.not.have.property('baz', 'bar');
    *
    *     // deep referencing
    *     var deepObj = {
@@ -910,12 +913,11 @@ module.exports = function (chai, _) {
         ? pathInfo.value
         : obj[name];
 
-    if (negate && arguments.length > 1) {
-      if (undefined === value) {
-        msg = (msg != null) ? msg + ': ' : '';
-        throw new Error(msg + _.inspect(obj) + ' has no ' + descriptor + _.inspect(name));
-      }
-    } else {
+    // When performing a negated assertion for both name and val, merely having a
+    // property with the given name isn't enough to cause the assertion to fail. It
+    // must both have a property with the given name, and the value of that property
+    // must equal the given val. Therefore, skip this assertion in favor of the next.
+    if (!negate || arguments.length === 1) {
       this.assert(
           hasProperty
         , 'expected #{this} to have a ' + descriptor + _.inspect(name)
@@ -924,7 +926,7 @@ module.exports = function (chai, _) {
 
     if (arguments.length > 1) {
       this.assert(
-          val === value
+          hasProperty && val === value
         , 'expected #{this} to have a ' + descriptor + _.inspect(name) + ' of #{exp}, but got #{act}'
         , 'expected #{this} to not have a ' + descriptor + _.inspect(name) + ' of #{act}'
         , val

lib/chai/interface/assert.js

@@ -1005,10 +1005,11 @@ module.exports = function (chai, util) {
   /**
    * ### .propertyNotVal(object, property, value, [message])
    *
-   * Asserts that `object` has a property named by `property`, but with a value
-   * different from that given by `value`.
+   * Asserts that `object` does _not_ have a property named by `property` with
+   * value given by `value`.
    *
    *     assert.propertyNotVal({ tea: 'is good' }, 'tea', 'is bad');
+   *     assert.propertyNotVal({ tea: 'is good' }, 'coffee', 'is good');
    *
    * @name propertyNotVal
    * @param {Object} object
@@ -1048,11 +1049,12 @@ module.exports = function (chai, util) {
   /**
    * ### .deepPropertyNotVal(object, property, value, [message])
    *
-   * Asserts that `object` has a property named by `property`, but with a value
-   * different from that given by `value`. `property` can use dot- and
-   * bracket-notation for deep reference.
+   * Asserts that `object` does _not_ have a property named by `property` with
+   * value given by `value`. `property` can use dot- and bracket-notation for deep
+   * reference.
    *
    *     assert.deepPropertyNotVal({ tea: { green: 'matcha' }}, 'tea.green', 'konacha');
+   *     assert.deepPropertyNotVal({ tea: { green: 'matcha' }}, 'coffee.green', 'matcha');
    *
    * @name deepPropertyNotVal
    * @param {Object} object

test/assert.js

@@ -945,9 +945,12 @@ describe('assert', function () {
     assert.deepProperty(obj, 'foo.bar');
     assert.notProperty(obj, 'baz');
     assert.notProperty(obj, 'foo.bar');
+    assert.propertyNotVal(simpleObj, 'foo', 'flow');
+    assert.propertyNotVal(simpleObj, 'flow', 'bar');
     assert.notDeepProperty(obj, 'foo.baz');
     assert.deepPropertyVal(obj, 'foo.bar', 'baz');
     assert.deepPropertyNotVal(obj, 'foo.bar', 'flow');
+    assert.deepPropertyNotVal(obj, 'foo.flow', 'baz');
 
     err(function () {
       assert.property(obj, 'baz');

test/expect.js

@@ -532,6 +532,8 @@ describe('expect', function () {
   it('property(name, val)', function(){
     expect('test').to.have.property('length', 4);
     expect('asd').to.have.property('constructor', String);
+    expect('test').to.not.have.property('length', 3);
+    expect('test').to.not.have.property('foo', 4);
 
     var deepObj = {
         green: { tea: 'matcha' }
@@ -582,10 +584,6 @@ describe('expect', function () {
       expect('asd').to.not.have.property('length', 3, 'blah');
     }, "blah: expected 'asd' to not have a property 'length' of 3");
 
-    err(function(){
-      expect('asd').to.not.have.property('foo', 3, 'blah');
-    }, "blah: 'asd' has no property 'foo'");
-
     err(function(){
       expect('asd').to.have.property('constructor', Number, 'blah');
     }, "blah: expected 'asd' to have a property 'constructor' of [Function: Number], but got [Function: String]");
@@ -594,6 +592,10 @@ describe('expect', function () {
   it('deep.property(name, val)', function(){
     expect({ foo: { bar: 'baz' } })
       .to.have.deep.property('foo.bar', 'baz');
+    expect({ foo: { bar: 'baz' } })
+      .to.not.have.deep.property('foo.bar', 'quux');
+    expect({ foo: { bar: 'baz' } })
+      .to.not.have.deep.property('foo.quux', 'baz');
 
     err(function(){
       expect({ foo: { bar: 'baz' } })
@@ -603,10 +605,6 @@ describe('expect', function () {
       expect({ foo: { bar: 'baz' } })
         .to.not.have.deep.property('foo.bar', 'baz', 'blah');
     }, "blah: expected { foo: { bar: 'baz' } } to not have a deep property 'foo.bar' of 'baz'");
-    err(function(){
-      expect({ foo: 5 })
-        .to.not.have.deep.property('foo.bar', 'baz', 'blah');
-    }, "blah: { foo: 5 } has no deep property 'foo.bar'");
   });
 
   it('ownProperty(name)', function(){

test/should.js

@@ -438,10 +438,25 @@ describe('should', function() {
     }, "expected 'asd' to have a property 'foo'");
   });
 
+  it('deep.property(name)', function(){
+    ({ 'foo.bar': 'baz'}).should.not.have.deep.property('foo.bar');
+    ({ foo: { bar: 'baz' } }).should.have.deep.property('foo.bar');
+
+    ({ 'foo': [1, 2, 3] }).should.have.deep.property('foo[1]');
+
+    ({ 'foo.bar[]': 'baz'}).should.have.deep.property('foo\\.bar\\[\\]');
+
+    err(function(){
+      ({ 'foo.bar': 'baz' }).should.have.deep.property('foo.bar');
+    }, "expected { 'foo.bar': 'baz' } to have a deep property 'foo.bar'");
+  });
+
   it('property(name, val)', function(){
     'test'.should.have.property('length', 4);
     'asd'.should.have.property('constructor', String);
     ({ 1: 1 }).should.have.property(1, 1);
+    'test'.should.not.have.property('length', 3);
+    'test'.should.not.have.property('foo', 4);
 
     err(function(){
       'asd'.should.have.property('length', 4, 'blah');
@@ -451,15 +466,24 @@ describe('should', function() {
       'asd'.should.not.have.property('length', 3, 'blah');
     }, "blah: expected 'asd' to not have a property 'length' of 3");
 
-    err(function(){
-      'asd'.should.not.have.property('foo', 3, 'blah');
-    }, "blah: 'asd' has no property 'foo'");
-
     err(function(){
       'asd'.should.have.property('constructor', Number, 'blah');
     }, "blah: expected 'asd' to have a property 'constructor' of [Function: Number], but got [Function: String]");
   });
 
+  it('deep.property(name, val)', function(){
+    ({ foo: { bar: 'baz' } }).should.have.deep.property('foo.bar', 'baz');
+    ({ foo: { bar: 'baz' } }).should.not.have.deep.property('foo.bar', 'quux');
+    ({ foo: { bar: 'baz' } }).should.not.have.deep.property('foo.quux', 'baz');
+
+    err(function(){
+      ({ foo: { bar: 'baz' } }).should.have.deep.property('foo.bar', 'quux', 'blah');
+    }, "blah: expected { foo: { bar: 'baz' } } to have a deep property 'foo.bar' of 'quux', but got 'baz'");
+    err(function(){
+      ({ foo: { bar: 'baz' } }).should.not.have.deep.property('foo.bar', 'baz', 'blah');
+    }, "blah: expected { foo: { bar: 'baz' } } to not have a deep property 'foo.bar' of 'baz'");
+  });
+
   it('ownProperty(name)', function(){
     'test'.should.have.ownProperty('length');
     'test'.should.haveOwnProperty('length');