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SpySpec.js
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SpySpec.js
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describe('Spies', function () {
it('should replace the specified function with a spy object', function() {
var originalFunctionWasCalled = false;
var TestClass = {
someFunction: function() {
originalFunctionWasCalled = true;
}
};
this.spyOn(TestClass, 'someFunction');
expect(TestClass.someFunction.wasCalled).toEqual(false);
expect(TestClass.someFunction.callCount).toEqual(0);
TestClass.someFunction('foo');
expect(TestClass.someFunction.wasCalled).toEqual(true);
expect(TestClass.someFunction.callCount).toEqual(1);
expect(TestClass.someFunction.mostRecentCall.args).toEqual(['foo']);
expect(TestClass.someFunction.mostRecentCall.object).toEqual(TestClass);
expect(originalFunctionWasCalled).toEqual(false);
TestClass.someFunction('bar');
expect(TestClass.someFunction.callCount).toEqual(2);
expect(TestClass.someFunction.mostRecentCall.args).toEqual(['bar']);
});
it('should allow you to view args for a particular call', function() {
var originalFunctionWasCalled = false;
var TestClass = {
someFunction: function() {
originalFunctionWasCalled = true;
}
};
this.spyOn(TestClass, 'someFunction');
TestClass.someFunction('foo');
TestClass.someFunction('bar');
expect(TestClass.someFunction.calls[0].args).toEqual(['foo']);
expect(TestClass.someFunction.calls[1].args).toEqual(['bar']);
expect(TestClass.someFunction.mostRecentCall.args).toEqual(['bar']);
});
it('should be possible to call through to the original method, or return a specific result', function() {
var originalFunctionWasCalled = false;
var passedArgs;
var passedObj;
var TestClass = {
someFunction: function() {
originalFunctionWasCalled = true;
passedArgs = arguments;
passedObj = this;
return "return value from original function";
}
};
this.spyOn(TestClass, 'someFunction').andCallThrough();
var result = TestClass.someFunction('arg1', 'arg2');
expect(result).toEqual("return value from original function");
expect(originalFunctionWasCalled).toEqual(true);
expect(passedArgs).toEqual(['arg1', 'arg2']);
expect(passedObj).toEqual(TestClass);
expect(TestClass.someFunction.wasCalled).toEqual(true);
});
it('should be possible to return a specific value', function() {
var originalFunctionWasCalled = false;
var TestClass = {
someFunction: function() {
originalFunctionWasCalled = true;
return "return value from original function";
}
};
this.spyOn(TestClass, 'someFunction').andReturn("some value");
originalFunctionWasCalled = false;
var result = TestClass.someFunction('arg1', 'arg2');
expect(result).toEqual("some value");
expect(originalFunctionWasCalled).toEqual(false);
});
it('should be possible to throw a specific error', function() {
var originalFunctionWasCalled = false;
var TestClass = {
someFunction: function() {
originalFunctionWasCalled = true;
return "return value from original function";
}
};
this.spyOn(TestClass, 'someFunction').andThrow(new Error('fake error'));
var exception;
try {
TestClass.someFunction('arg1', 'arg2');
} catch (e) {
exception = e;
}
expect(exception.message).toEqual('fake error');
expect(originalFunctionWasCalled).toEqual(false);
});
it('should be possible to call a specified function', function() {
var originalFunctionWasCalled = false;
var fakeFunctionWasCalled = false;
var passedArgs;
var passedObj;
var TestClass = {
someFunction: function() {
originalFunctionWasCalled = true;
return "return value from original function";
}
};
this.spyOn(TestClass, 'someFunction').andCallFake(function() {
fakeFunctionWasCalled = true;
passedArgs = arguments;
passedObj = this;
return "return value from fake function";
});
var result = TestClass.someFunction('arg1', 'arg2');
expect(result).toEqual("return value from fake function");
expect(originalFunctionWasCalled).toEqual(false);
expect(fakeFunctionWasCalled).toEqual(true);
expect(passedArgs).toEqual(['arg1', 'arg2']);
expect(passedObj).toEqual(TestClass);
expect(TestClass.someFunction.wasCalled).toEqual(true);
});
it('is torn down when this.removeAllSpies is called', function() {
var originalFunctionWasCalled = false;
var TestClass = {
someFunction: function() {
originalFunctionWasCalled = true;
}
};
this.spyOn(TestClass, 'someFunction');
TestClass.someFunction('foo');
expect(originalFunctionWasCalled).toEqual(false);
this.removeAllSpies();
TestClass.someFunction('foo');
expect(originalFunctionWasCalled).toEqual(true);
});
it('calls removeAllSpies during spec finish', function() {
var test = new jasmine.Spec(new jasmine.Env(), {}, 'sample test');
this.spyOn(test, 'removeAllSpies');
test.finish();
expect(test.removeAllSpies).wasCalled();
});
it('throws an exception when some method is spied on twice', function() {
var TestClass = { someFunction: function() {
} };
this.spyOn(TestClass, 'someFunction');
var exception;
try {
this.spyOn(TestClass, 'someFunction');
} catch (e) {
exception = e;
}
expect(exception).toBeDefined();
});
it('should be able to reset a spy', function() {
var TestClass = { someFunction: function() {} };
this.spyOn(TestClass, 'someFunction');
expect(TestClass.someFunction).not.toHaveBeenCalled();
TestClass.someFunction();
expect(TestClass.someFunction).toHaveBeenCalled();
TestClass.someFunction.reset();
expect(TestClass.someFunction).not.toHaveBeenCalled();
expect(TestClass.someFunction.callCount).toEqual(0);
});
describe('ignoreMethodDoesntExist', function() {
var TestClass = {};
it('should spy on non-existent properties', function() {
// via currentSpec
this.spyOn(TestClass, 'someFunction', true);
expect(TestClass.someFunction).toEqual(jasmine.any(Function));
// via global spyOn
spyOn(TestClass, 'someOtherFunction', true);
expect(TestClass.someOtherFunction).toEqual(jasmine.any(Function));
});
it('should clean up after itself', function() {
expect(TestClass.someFunction).toBeUndefined();
expect(TestClass.someOtherFunction).toBeUndefined();
});
});
describe("createSpyObj", function() {
it("should create an object with a bunch of spy methods when you call jasmine.createSpyObj()", function() {
var spyObj = jasmine.createSpyObj('BaseName', ['method1', 'method2']);
expect(spyObj).toEqual({ method1: jasmine.any(Function), method2: jasmine.any(Function)});
expect(spyObj.method1.identity).toEqual('BaseName.method1');
expect(spyObj.method2.identity).toEqual('BaseName.method2');
});
it("should throw if you do not pass an array argument", function() {
expect(function() {
jasmine.createSpyObj('BaseName');
}).toThrow('createSpyObj requires a non-empty array of method names to create spies for');
});
it("should throw if you pass an empty array argument", function() {
expect(function() {
jasmine.createSpyObj('BaseName');
}).toThrow('createSpyObj requires a non-empty array of method names to create spies for');
});
});
describe('createSpy deletion', function() {
var TestClass = {}; // ie global "window" object
it('should create a spy', function() {
TestClass.mySpy = jasmine.createSpy('mySpy');
expect(TestClass.mySpy).toEqual(jasmine.any(Function));
});
it('should clean up after itself', function() {
expect(TestClass.mySpy).toBeUndefined();
});
});
});