Does fixture.whenStable() actually do anything in my angular tests if not within an async test execution...
I have been reading a lot about angular testing lately and the pairs are always async+fixture.whenStable and fakeAsync+tick, however you can always call fixtrue.whenStable as it is not tightly coupled. If you call it when not using the async utility to track promises in a test zone will it actually do anything?
For example:
it('should be able to do this thing that needs some async setup', () => {
fixture.detectChanges();
fixture.whenStable().then()
});
I understand the difference between FakeAsync/Tick and fixture.detectChanges. My question is regarding what fixture.whenstable will do when inside of a FakeAsync execution zone as an Async zone should keep track of async work allowing fixture.whenstable to hook into that tracking, at least as I understand it. Or indeed if used and not within an async execution zone at all.
So if fixture.whenstable is used inside a FakeAsync function, or a function that does not setup an async execution zone, will it work as intended?
angular unit-testing
asked Nov 26 '18 at 11:19
CraigCraig
206213
add a comment |
I have been reading a lot about angular testing lately and the pairs are always async+fixture.whenStable and fakeAsync+tick, however you can always call fixtrue.whenStable as it is not tightly coupled. If you call it when not using the async utility to track promises in a test zone will it actually do anything?
For example:
it('should be able to do this thing that needs some async setup', () => {
fixture.detectChanges();
fixture.whenStable().then()
});
I understand the difference between FakeAsync/Tick and fixture.detectChanges. My question is regarding what fixture.whenstable will do when inside of a FakeAsync execution zone as an Async zone should keep track of async work allowing fixture.whenstable to hook into that tracking, at least as I understand it. Or indeed if used and not within an async execution zone at all.
So if fixture.whenstable is used inside a FakeAsync function, or a function that does not setup an async execution zone, will it work as intended?
angular unit-testing
asked Nov 26 '18 at 11:19
CraigCraig
206213
Possible duplicate of FakeAsync/tick (Async/whenStable) vs detectChanges()
– dmcgrandle
Nov 26 '18 at 17:53
add a comment |
I have been reading a lot about angular testing lately and the pairs are always async+fixture.whenStable and fakeAsync+tick, however you can always call fixtrue.whenStable as it is not tightly coupled. If you call it when not using the async utility to track promises in a test zone will it actually do anything?
For example:
it('should be able to do this thing that needs some async setup', () => {
fixture.detectChanges();
fixture.whenStable().then()
});
I understand the difference between FakeAsync/Tick and fixture.detectChanges. My question is regarding what fixture.whenstable will do when inside of a FakeAsync execution zone as an Async zone should keep track of async work allowing fixture.whenstable to hook into that tracking, at least as I understand it. Or indeed if used and not within an async execution zone at all.
So if fixture.whenstable is used inside a FakeAsync function, or a function that does not setup an async execution zone, will it work as intended?
angular unit-testing
asked Nov 26 '18 at 11:19
CraigCraig
206213
I have been reading a lot about angular testing lately and the pairs are always async+fixture.whenStable and fakeAsync+tick, however you can always call fixtrue.whenStable as it is not tightly coupled. If you call it when not using the async utility to track promises in a test zone will it actually do anything?
For example:
it('should be able to do this thing that needs some async setup', () => {
fixture.detectChanges();
fixture.whenStable().then()
});
I understand the difference between FakeAsync/Tick and fixture.detectChanges. My question is regarding what fixture.whenstable will do when inside of a FakeAsync execution zone as an Async zone should keep track of async work allowing fixture.whenstable to hook into that tracking, at least as I understand it. Or indeed if used and not within an async execution zone at all.
So if fixture.whenstable is used inside a FakeAsync function, or a function that does not setup an async execution zone, will it work as intended?
angular unit-testing
angular unit-testing
asked Nov 26 '18 at 11:19
CraigCraig
206213
asked Nov 26 '18 at 11:19
CraigCraig
206213
edited Dec 10 '18 at 12:42
Craig
asked Nov 26 '18 at 11:19
CraigCraig
206213
asked Nov 26 '18 at 11:19
CraigCraig
206213
asked Nov 26 '18 at 11:19
CraigCraig
206213
206213
Possible duplicate of FakeAsync/tick (Async/whenStable) vs detectChanges()
– dmcgrandle
Nov 26 '18 at 17:53
add a comment |
Possible duplicate of FakeAsync/tick (Async/whenStable) vs detectChanges()
– dmcgrandle
Nov 26 '18 at 17:53
Possible duplicate of FakeAsync/tick (Async/whenStable) vs detectChanges()
– dmcgrandle
Nov 26 '18 at 17:53
Possible duplicate of FakeAsync/tick (Async/whenStable) vs detectChanges()
– dmcgrandle
Nov 26 '18 at 17:53
add a comment |
1 Answer
1
active
oldest
votes
No the whenStable() does nothing if you test without async of fakeAsync. What whenStable() does is to wait for all tasks in the test NgZone to complete. When you don't test with async the NgZone does not get created at all and whenStable() just returns immediately.
If you want more detail check the code for ComponentFixture in GitHub.
answered Dec 13 '18 at 22:36
AlesDAlesD
2,60839
Does fakeAsync setup a zone that whenstable() can use?
– Craig
Dec 14 '18 at 10:02
Yes bothfakeAsync()andasync()create a zone.
– AlesD
Dec 14 '18 at 21:00
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53479998%2fdoes-fixture-whenstable-actually-do-anything-in-my-angular-tests-if-not-within%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
No the whenStable() does nothing if you test without async of fakeAsync. What whenStable() does is to wait for all tasks in the test NgZone to complete. When you don't test with async the NgZone does not get created at all and whenStable() just returns immediately.
If you want more detail check the code for ComponentFixture in GitHub.
answered Dec 13 '18 at 22:36
AlesDAlesD
2,60839
Does fakeAsync setup a zone that whenstable() can use?
– Craig
Dec 14 '18 at 10:02
Yes bothfakeAsync()andasync()create a zone.
– AlesD
Dec 14 '18 at 21:00
add a comment |
No the whenStable() does nothing if you test without async of fakeAsync. What whenStable() does is to wait for all tasks in the test NgZone to complete. When you don't test with async the NgZone does not get created at all and whenStable() just returns immediately.
If you want more detail check the code for ComponentFixture in GitHub.
answered Dec 13 '18 at 22:36
AlesDAlesD
2,60839
Does fakeAsync setup a zone that whenstable() can use?
– Craig
Dec 14 '18 at 10:02
Yes bothfakeAsync()andasync()create a zone.
– AlesD
Dec 14 '18 at 21:00
add a comment |
No the whenStable() does nothing if you test without async of fakeAsync. What whenStable() does is to wait for all tasks in the test NgZone to complete. When you don't test with async the NgZone does not get created at all and whenStable() just returns immediately.
If you want more detail check the code for ComponentFixture in GitHub.
answered Dec 13 '18 at 22:36
AlesDAlesD
2,60839
No the whenStable() does nothing if you test without async of fakeAsync. What whenStable() does is to wait for all tasks in the test NgZone to complete. When you don't test with async the NgZone does not get created at all and whenStable() just returns immediately.
If you want more detail check the code for ComponentFixture in GitHub.
answered Dec 13 '18 at 22:36
AlesDAlesD
2,60839
edited Dec 13 '18 at 22:42
answered Dec 13 '18 at 22:36
AlesDAlesD
2,60839
answered Dec 13 '18 at 22:36
AlesDAlesD
2,60839
answered Dec 13 '18 at 22:36
AlesDAlesD
2,60839
2,60839
Does fakeAsync setup a zone that whenstable() can use?
– Craig
Dec 14 '18 at 10:02
Yes bothfakeAsync()andasync()create a zone.
– AlesD
Dec 14 '18 at 21:00
add a comment |
Does fakeAsync setup a zone that whenstable() can use?
– Craig
Dec 14 '18 at 10:02
Yes bothfakeAsync()andasync()create a zone.
– AlesD
Dec 14 '18 at 21:00
Does fakeAsync setup a zone that whenstable() can use?
– Craig
Dec 14 '18 at 10:02
Does fakeAsync setup a zone that whenstable() can use?
– Craig
Dec 14 '18 at 10:02
Yes both
fakeAsync() and async() create a zone.– AlesD
Dec 14 '18 at 21:00
Yes both
fakeAsync() and async() create a zone.– AlesD
Dec 14 '18 at 21:00
add a comment |
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53479998%2fdoes-fixture-whenstable-actually-do-anything-in-my-angular-tests-if-not-within%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Possible duplicate of FakeAsync/tick (Async/whenStable) vs detectChanges()
– dmcgrandle
Nov 26 '18 at 17:53