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fixes issue #1368 by adding stub#resolvesThis #1517

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merged 3 commits into from
Aug 10, 2017
Merged

fixes issue #1368 by adding stub#resolvesThis #1517

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62a2a80
fixes issue #1368 by adding stub#resolvesThis
Aug 7, 2017
0f797de
keep consistency
Aug 8, 2017
0e0f122
set the f lag returnValue to keep consistency
Aug 9, 2017
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3 changes: 3 additions & 0 deletions lib/sinon/behavior.js
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Original file line number Diff line number Diff line change
Expand Up @@ -117,6 +117,7 @@ var proto = {
this.exception ||
typeof this.returnArgAt === "number" ||
this.returnThis ||
this.resolveThis ||
typeof this.throwArgAt === "number" ||
this.fakeFn ||
this.returnValueDefined);
Expand All @@ -142,6 +143,8 @@ var proto = {
throw args[this.throwArgAt];
} else if (this.fakeFn) {
return this.fakeFn.apply(context, args);
} else if (this.resolveThis) {
return (this.promiseLibrary || Promise).resolve(context);
} else if (this.resolve) {
return (this.promiseLibrary || Promise).resolve(this.returnValue);
} else if (this.reject) {
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11 changes: 11 additions & 0 deletions lib/sinon/default-behaviors.js
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Expand Up @@ -155,6 +155,7 @@ module.exports = {
resolves: function resolves(fake, value) {
fake.returnValue = value;
fake.resolve = true;
fake.resolveThis = false;
fake.reject = false;
fake.returnValueDefined = true;
fake.exception = undefined;
Expand All @@ -173,6 +174,7 @@ module.exports = {
}
fake.returnValue = reason;
fake.resolve = false;
fake.resolveThis = false;
fake.reject = true;
fake.returnValueDefined = true;
fake.exception = undefined;
Expand All @@ -181,6 +183,15 @@ module.exports = {
return fake;
},

resolvesThis: function resolvesThis(fake) {
fake.resolveThis = true;
fake.resolve = false;
fake.reject = false;
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IMO we should keep this consistent with other behaviors, such as rejects, which also sets many other flags, as you can see here. Even though this is enough to make it work, I think that by keeping the whole API consistent when it comes to flagging fakes is extremely important.

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I think you created the wrong link? It just points back to your comment.

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I guess I can set returnValueDefined and exception flags to false to keep consistency. Do you think some other flags need to be turned off?

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@fatso83 I think that link only works inside the files tab. When I click it inside of it the link works.

Basically I think the following flags should be set:

  • fake.returnValue
  • fake.returnValueDefined
  • fake.exception

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Okay now resolves, rejects and resolvesThis all act on the same flags.
I set returnValue to undefined as the stub resolves with itself.
Is it okay by you?

fake.returnValueDefined = false;
fake.exception = undefined;
fake.fakeFn = undefined;
},

callThrough: function callThrough(fake) {
fake.callsThrough = true;
},
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1 change: 1 addition & 0 deletions lib/sinon/stub.js
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Expand Up @@ -123,6 +123,7 @@ var proto = {
delete this.throwArgAt;
delete this.fakeFn;
this.returnThis = false;
this.resolveThis = false;

fakes.forEach(function (fake) {
fake.resetBehavior();
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54 changes: 54 additions & 0 deletions test/stub-test.js
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Expand Up @@ -285,6 +285,50 @@ describe("stub", function () {
});
});

describe(".resolvesThis", function () {
afterEach(function () {
if (Promise.resolve.restore) {
Promise.resolve.restore();
}
});

it("returns a promise resolved with this", function () {
var instance = {};
instance.stub = createStub.create();
instance.stub.resolvesThis();

return instance.stub().then(function (actual) {
assert.same(actual, instance);
});
});

it("returns a promise resolved with the context bound with stub#call", function () {
var stub = createStub.create();
stub.resolvesThis();
var object = {};

return stub.call(object).then(function (actual) {
assert.same(actual, object);
});
});

it("returns a promise resolved with the context bound with stub#apply", function () {
var stub = createStub.create();
stub.resolvesThis();
var object = {};

return stub.apply(object).then(function (actual) {
assert.same(actual, object);
});
});

it("returns the stub itself, allowing to chain function calls", function () {
var stub = createStub.create();

assert.same(stub.resolvesThis(), stub);
});
});

describe(".returnsArg", function () {
it("returns argument at specified index", function () {
var stub = createStub.create();
Expand Down Expand Up @@ -2171,6 +2215,16 @@ describe("stub", function () {
refute.defined(instance.stub());
});

it("cleans 'resolvesThis' behavior, so the stub does not resolve nor returns anything", function () {
var instance = {};
instance.stub = createStub.create();
instance.stub.resolvesThis();

instance.stub.resetBehavior();

refute.defined(instance.stub());
});

describe("does not touch properties that are reset by 'reset'", function () {
it(".calledOnce", function () {
var stub = createStub();
Expand Down