Add .deep.include for deep equality comparisons

lib/chai/core/assertions.js

@@ -71,11 +71,13 @@ module.exports = function (chai, _) {
   /**
    * ### .deep
    *
-   * Sets the `deep` flag, later used by the `equal`, `members`, and `property`
-   * assertions.
+   * Sets the `deep` flag, later used by the `equal`, `include`, `members`, and
+   * `property` assertions.
    *
    *     const obj = {a: 1};
    *     expect(obj).to.deep.equal({a: 1});
+   *     expect([obj]).to.deep.include({a:1});
+   *     expect({foo: obj}).to.deep.include({foo: {a:1}});
    *     expect([obj]).to.have.deep.members([{a: 1}]);
    *     expect({foo: obj}).to.have.deep.property('foo', {a: 1});
    *
@@ -239,6 +241,14 @@ module.exports = function (chai, _) {
    *     expect({foo: obj1, bar: obj2}).to.not.include({foo: {a: 1}});
    *     expect({foo: obj1, bar: obj2}).to.not.include({foo: obj1, bar: {b: 2}});
    *
+   * If the `deep` flag is set, deep equality is used instead. For instance:
+   *
+   *     var obj1 = {a: 1}
+   *       , obj2 = {b: 2};
+   *     expect([obj1, obj2]).to.deep.include({a: 1});
+   *     expect({foo: obj1, bar: obj2}).to.deep.include({foo: {a: 1}});
+   *     expect({foo: obj1, bar: obj2}).to.deep.include({foo: {a: 1}, bar: {b: 2}});
+   *
    * These assertions can also be used as property based language chains,
    * enabling the `contains` flag for the `keys` assertion. For instance:
    *
@@ -248,6 +258,10 @@ module.exports = function (chai, _) {
    * @alias contain
    * @alias includes
    * @alias contains
+   * @alias deep.include
+   * @alias deep.contain
+   * @alias deep.includes
+   * @alias deep.contains
    * @param {Object|String|Number} obj
    * @param {String} message _optional_
    * @namespace BDD
@@ -258,11 +272,19 @@ module.exports = function (chai, _) {
     flag(this, 'contains', true);
   }
 
+  function isDeepIncluded (arr, val) {
+    return arr.some(function (arrVal) {
+      return _.eql(arrVal, val);
+    });
+  }
+
   function include (val, msg) {
     _.expectTypes(this, ['array', 'object', 'string']);
 
     if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
+    var obj = flag(this, 'object')
+      , isDeep = flag(this, 'deep')
+      , descriptor = isDeep ? 'deep ' : '';
 
     // This block is for asserting a subset of properties in an object.
     if (_.type(obj) === 'object') {
@@ -300,9 +322,10 @@ module.exports = function (chai, _) {
 
     // Assert inclusion in an array or substring in a string.
     this.assert(
-        typeof obj !== "undefined" && typeof obj !== "null" && ~obj.indexOf(val)
-      , 'expected #{this} to include ' + _.inspect(val)
-      , 'expected #{this} to not include ' + _.inspect(val));
+        typeof obj === 'string' || !isDeep ? ~obj.indexOf(val)
+                                           : isDeepIncluded(obj, val)
+      , 'expected #{this} to ' + descriptor + 'include ' + _.inspect(val)
+      , 'expected #{this} to not ' + descriptor + 'include ' + _.inspect(val));
   }
 
   Assertion.addChainableMethod('include', include, includeChainingBehavior);

lib/chai/interface/assert.js

@@ -894,6 +894,56 @@ module.exports = function (chai, util) {
     new Assertion(exp, msg, assert.notInclude).not.include(inc);
   };
 
+  /**
+   * ### .deepInclude(haystack, needle, [message])
+   *
+   * Asserts that `haystack` includes `needle`. Can be used to assert the
+   * inclusion of a value in an array or a subset of properties in an object.
+   * Deep equality is used.
+   *
+   *     var obj1 = {a: 1}
+   *       , obj2 = {b: 2};
+   *     assert.deepInclude([obj1, obj2], {a: 1});
+   *     assert.deepInclude({foo: obj1, bar: obj2}, {foo: {a: 1}});
+   *     assert.deepInclude({foo: obj1, bar: obj2}, {foo: {a: 1}, bar: {b: 2}});
+   *
+   * @name deepInclude
+   * @param {Array|String} haystack
+   * @param {Mixed} needle
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.deepInclude = function (exp, inc, msg) {
+    new Assertion(exp, msg, assert.include).deep.include(inc);
+  };
+
+  /**
+   * ### .notDeepInclude(haystack, needle, [message])
+   *
+   * Asserts that `haystack` does not include `needle`. Can be used to assert
+   * the absence of a value in an array or a subset of properties in an object.
+   * Deep equality is used.
+   *
+   *     var obj1 = {a: 1}
+   *       , obj2 = {b: 2};
+   *     assert.notDeepInclude([obj1, obj2], {a: 9});
+   *     assert.notDeepInclude({foo: obj1, bar: obj2}, {foo: {a: 9}});
+   *     assert.notDeepInclude({foo: obj1, bar: obj2}, {foo: {a: 1}, bar: {b: 9}});
+   *
+   * @name notDeepInclude
+   * @param {Array|String} haystack
+   * @param {Mixed} needle
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notDeepInclude = function (exp, inc, msg) {
+    new Assertion(exp, msg, assert.notInclude).not.deep.include(inc);
+  };
+
   /**
    * ### .match(value, regexp, [message])
    *

test/assert.js

@@ -551,6 +551,36 @@ describe('assert', function () {
     }, "expected \'foobar\' to not include \'bar\'");
   });
 
+  it('deepInclude and notDeepInclude', function () {
+    var obj1 = {a: 1}
+      , obj2 = {b: 2};
+    assert.deepInclude([obj1, obj2], {a: 1});
+    assert.notDeepInclude([obj1, obj2], {a: 9});
+    assert.notDeepInclude([obj1, obj2], {z: 1});
+    assert.deepInclude({foo: obj1, bar: obj2}, {foo: {a: 1}});
+    assert.deepInclude({foo: obj1, bar: obj2}, {foo: {a: 1}, bar: {b: 2}});
+    assert.notDeepInclude({foo: obj1, bar: obj2}, {foo: {a: 9}});
+    assert.notDeepInclude({foo: obj1, bar: obj2}, {foo: {z: 1}});
+    assert.notDeepInclude({foo: obj1, bar: obj2}, {baz: {a: 1}});
+    assert.notDeepInclude({foo: obj1, bar: obj2}, {foo: {a: 1}, bar: {b: 9}});
+
+    err(function () {
+      assert.deepInclude([obj1, obj2], {a: 9});
+    }, "expected [ { a: 1 }, { b: 2 } ] to deep include { a: 9 }");
+
+    err(function () {
+      assert.notDeepInclude([obj1, obj2], {a: 1});
+    }, "expected [ { a: 1 }, { b: 2 } ] to not deep include { a: 1 }");
+
+    err(function () {
+      assert.deepInclude({foo: obj1, bar: obj2}, {foo: {a: 1}, bar: {b: 9}});
+    }, "expected { foo: { a: 1 }, bar: { b: 2 } } to have a deep property 'bar' of { b: 9 }, but got { b: 2 }");
+
+    err(function () {
+      assert.notDeepInclude({foo: obj1, bar: obj2}, {foo: {a: 1}, bar: {b: 2}});
+    }, "expected { foo: { a: 1 }, bar: { b: 2 } } to not have a deep property 'foo' of { a: 1 }");
+  });
+
   it('keys(array|Object|arguments)', function(){
     assert.hasAllKeys({ foo: 1 }, [ 'foo' ]);
     assert.hasAllKeys({ foo: 1, bar: 2 }, [ 'foo', 'bar' ]);

test/expect.js

@@ -809,6 +809,36 @@ describe('expect', function () {
     }, "object tested must be an array, an object, or a string, but undefined given");
   });
 
+  it('deep.include()', function () {
+    var obj1 = {a: 1}
+      , obj2 = {b: 2};
+    expect([obj1, obj2]).to.deep.include({a: 1});
+    expect([obj1, obj2]).to.not.deep.include({a: 9});
+    expect([obj1, obj2]).to.not.deep.include({z: 1});
+    expect({foo: obj1, bar: obj2}).to.deep.include({foo: {a: 1}});
+    expect({foo: obj1, bar: obj2}).to.deep.include({foo: {a: 1}, bar: {b: 2}});
+    expect({foo: obj1, bar: obj2}).to.not.deep.include({foo: {a: 9}});
+    expect({foo: obj1, bar: obj2}).to.not.deep.include({foo: {z: 1}});
+    expect({foo: obj1, bar: obj2}).to.not.deep.include({baz: {a: 1}});
+    expect({foo: obj1, bar: obj2}).to.not.deep.include({foo: {a: 1}, bar: {b: 9}});
+
+    err(function () {
+      expect([obj1, obj2]).to.deep.include({a: 9});
+    }, "expected [ { a: 1 }, { b: 2 } ] to deep include { a: 9 }");
+
+    err(function () {
+      expect([obj1, obj2]).to.not.deep.include({a: 1});
+    }, "expected [ { a: 1 }, { b: 2 } ] to not deep include { a: 1 }");
+
+    err(function () {
+      expect({foo: obj1, bar: obj2}).to.deep.include({foo: {a: 1}, bar: {b: 9}});
+    }, "expected { foo: { a: 1 }, bar: { b: 2 } } to have a deep property 'bar' of { b: 9 }, but got { b: 2 }");
+
+    err(function () {
+      expect({foo: obj1, bar: obj2}).to.not.deep.include({foo: {a: 1}, bar: {b: 2}});
+    }, "expected { foo: { a: 1 }, bar: { b: 2 } } to not have a deep property 'foo' of { a: 1 }");
+  });
+
   it('keys(array|Object|arguments)', function(){
     expect({ foo: 1 }).to.have.keys(['foo']);
     expect({ foo: 1 }).have.keys({ 'foo': 6 });

test/should.js

@@ -681,6 +681,36 @@ describe('should', function() {
     }, "object tested must be an array, an object, or a string, but number given");
   });
 
+  it('deep.include()', function () {
+    var obj1 = {a: 1}
+      , obj2 = {b: 2};
+    [obj1, obj2].should.deep.include({a: 1});
+    [obj1, obj2].should.not.deep.include({a: 9});
+    [obj1, obj2].should.not.deep.include({z: 1});
+    ({foo: obj1, bar: obj2}).should.deep.include({foo: {a: 1}});
+    ({foo: obj1, bar: obj2}).should.deep.include({foo: {a: 1}, bar: {b: 2}});
+    ({foo: obj1, bar: obj2}).should.not.deep.include({foo: {a: 9}});
+    ({foo: obj1, bar: obj2}).should.not.deep.include({foo: {z: 1}});
+    ({foo: obj1, bar: obj2}).should.not.deep.include({baz: {a: 1}});
+    ({foo: obj1, bar: obj2}).should.not.deep.include({foo: {a: 1}, bar: {b: 9}});
+
+    err(function () {
+      [obj1, obj2].should.deep.include({a: 9});
+    }, "expected [ { a: 1 }, { b: 2 } ] to deep include { a: 9 }");
+
+    err(function () {
+      [obj1, obj2].should.not.deep.include({a: 1});
+    }, "expected [ { a: 1 }, { b: 2 } ] to not deep include { a: 1 }");
+
+    err(function () {
+      ({foo: obj1, bar: obj2}).should.deep.include({foo: {a: 1}, bar: {b: 9}});
+    }, "expected { foo: { a: 1 }, bar: { b: 2 } } to have a deep property 'bar' of { b: 9 }, but got { b: 2 }");
+
+    err(function () {
+      ({foo: obj1, bar: obj2}).should.not.deep.include({foo: {a: 1}, bar: {b: 2}});
+    }, "expected { foo: { a: 1 }, bar: { b: 2 } } to not have a deep property 'foo' of { a: 1 }");
+  });
+
   it('keys(array|Object|arguments)', function(){
     ({ foo: 1 }).should.have.keys(['foo']);
     ({ foo: 1 }).should.have.keys({ 'foo': 6 });