how to expect a request from the browser on a javascript unit test running under karma?
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How to test method that only side-effect should be to trigger a URL request out of the control of the application. For illustration:
function asyncFire(srcURI, callback, ...){
return setTimeout(function(){
var img = new Image();
img.onerror = img.onload = callback
img.src = srcURI;
}, 15);
}
The real function also have retries and such, and tries to use sendBeacon first. All that I can figure how to mock the environment to test, but no idea how to detect the request triggered (or not) on karma runner.
I can also make the test work with local requests, but intercepting remote requests (i.e. to a domain out of the test scope) would be nice, specially to test dns resolution failures, etc.
javascript unit-testing karma-runner karma-mocha
asked Nov 29 '18 at 1:06
GabrielGabriel
247
add a comment |
How to test method that only side-effect should be to trigger a URL request out of the control of the application. For illustration:
function asyncFire(srcURI, callback, ...){
return setTimeout(function(){
var img = new Image();
img.onerror = img.onload = callback
img.src = srcURI;
}, 15);
}
The real function also have retries and such, and tries to use sendBeacon first. All that I can figure how to mock the environment to test, but no idea how to detect the request triggered (or not) on karma runner.
I can also make the test work with local requests, but intercepting remote requests (i.e. to a domain out of the test scope) would be nice, specially to test dns resolution failures, etc.
javascript unit-testing karma-runner karma-mocha
asked Nov 29 '18 at 1:06
GabrielGabriel
247
add a comment |
How to test method that only side-effect should be to trigger a URL request out of the control of the application. For illustration:
function asyncFire(srcURI, callback, ...){
return setTimeout(function(){
var img = new Image();
img.onerror = img.onload = callback
img.src = srcURI;
}, 15);
}
The real function also have retries and such, and tries to use sendBeacon first. All that I can figure how to mock the environment to test, but no idea how to detect the request triggered (or not) on karma runner.
I can also make the test work with local requests, but intercepting remote requests (i.e. to a domain out of the test scope) would be nice, specially to test dns resolution failures, etc.
javascript unit-testing karma-runner karma-mocha
asked Nov 29 '18 at 1:06
GabrielGabriel
247
How to test method that only side-effect should be to trigger a URL request out of the control of the application. For illustration:
function asyncFire(srcURI, callback, ...){
return setTimeout(function(){
var img = new Image();
img.onerror = img.onload = callback
img.src = srcURI;
}, 15);
}
The real function also have retries and such, and tries to use sendBeacon first. All that I can figure how to mock the environment to test, but no idea how to detect the request triggered (or not) on karma runner.
I can also make the test work with local requests, but intercepting remote requests (i.e. to a domain out of the test scope) would be nice, specially to test dns resolution failures, etc.
javascript unit-testing karma-runner karma-mocha
javascript unit-testing karma-runner karma-mocha
asked Nov 29 '18 at 1:06
GabrielGabriel
247
asked Nov 29 '18 at 1:06
GabrielGabriel
247
edited Nov 29 '18 at 2:04
Gabriel
asked Nov 29 '18 at 1:06
GabrielGabriel
247
asked Nov 29 '18 at 1:06
GabrielGabriel
247
asked Nov 29 '18 at 1:06
GabrielGabriel
247
247
add a comment |
add a comment |
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