Mock underscore in jasmine/angular test
In a component, I have the following method:
import _ from 'underscore';
@Component({
selector: 'hello-selector',
templateUrl: './hello.component.html'
)}
export class Hello implements OnInit{
...
public arrayHello(): Array {
return _.chain(...)
...
}
...
ngOnInit(): void {
myarray = this.arrayHello();
}
The default test case in the angular spec file failed with the error
TypeError: Cannot read property 'chain' of undefined
How to Mock underscore in order to deal with this error?
I already tried the following but it does not seems to be the right way: spyOn(_, 'chain').and.callFake((f => f()));
angular mocking underscore.js karma-jasmine
edited Nov 19 '18 at 10:02
Philipp Meissner
1,93011532
asked Nov 19 '18 at 9:51
billyjovbillyjov
765316
add a comment |
In a component, I have the following method:
import _ from 'underscore';
@Component({
selector: 'hello-selector',
templateUrl: './hello.component.html'
)}
export class Hello implements OnInit{
...
public arrayHello(): Array {
return _.chain(...)
...
}
...
ngOnInit(): void {
myarray = this.arrayHello();
}
The default test case in the angular spec file failed with the error
TypeError: Cannot read property 'chain' of undefined
How to Mock underscore in order to deal with this error?
I already tried the following but it does not seems to be the right way: spyOn(_, 'chain').and.callFake((f => f()));
angular mocking underscore.js karma-jasmine
edited Nov 19 '18 at 10:02
Philipp Meissner
1,93011532
asked Nov 19 '18 at 9:51
billyjovbillyjov
765316
add a comment |
In a component, I have the following method:
import _ from 'underscore';
@Component({
selector: 'hello-selector',
templateUrl: './hello.component.html'
)}
export class Hello implements OnInit{
...
public arrayHello(): Array {
return _.chain(...)
...
}
...
ngOnInit(): void {
myarray = this.arrayHello();
}
The default test case in the angular spec file failed with the error
TypeError: Cannot read property 'chain' of undefined
How to Mock underscore in order to deal with this error?
I already tried the following but it does not seems to be the right way: spyOn(_, 'chain').and.callFake((f => f()));
angular mocking underscore.js karma-jasmine
edited Nov 19 '18 at 10:02
Philipp Meissner
1,93011532
asked Nov 19 '18 at 9:51
billyjovbillyjov
765316
In a component, I have the following method:
import _ from 'underscore';
@Component({
selector: 'hello-selector',
templateUrl: './hello.component.html'
)}
export class Hello implements OnInit{
...
public arrayHello(): Array {
return _.chain(...)
...
}
...
ngOnInit(): void {
myarray = this.arrayHello();
}
The default test case in the angular spec file failed with the error
TypeError: Cannot read property 'chain' of undefined
How to Mock underscore in order to deal with this error?
I already tried the following but it does not seems to be the right way: spyOn(_, 'chain').and.callFake((f => f()));
angular mocking underscore.js karma-jasmine
angular mocking underscore.js karma-jasmine
edited Nov 19 '18 at 10:02
Philipp Meissner
1,93011532
asked Nov 19 '18 at 9:51
billyjovbillyjov
765316
edited Nov 19 '18 at 10:02
Philipp Meissner
1,93011532
asked Nov 19 '18 at 9:51
billyjovbillyjov
765316
edited Nov 19 '18 at 10:02
Philipp Meissner
1,93011532
edited Nov 19 '18 at 10:02
Philipp Meissner
1,93011532
edited Nov 19 '18 at 10:02
Philipp Meissner
1,93011532
1,93011532
asked Nov 19 '18 at 9:51
billyjovbillyjov
765316
asked Nov 19 '18 at 9:51
billyjovbillyjov
765316
asked Nov 19 '18 at 9:51
billyjovbillyjov
765316
765316
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
You can create mock Object for underscore.
import _ from './test-data/UnderscoreMock';
And use UnderscoreMock:
./test-data/UnderscoreMock
export default const _ {
chain: () => {}
....
}
and set UnderscoreMock in component.
Second you can use spyOn into component.
spyOn(INSTANCE_COMPONENT, "chain");
answered Nov 19 '18 at 10:02
Konstantin OkhotnickKonstantin Okhotnick
1,300920
always get an undefined
– billyjov
Nov 19 '18 at 10:13
can tryingconst spyChain = (window._, 'chain').and.callFake(() => {})
– Konstantin Okhotnick
Nov 19 '18 at 10:16
andexpect(spyChain.chain).toHaveBeenCalled();
– Konstantin Okhotnick
Nov 19 '18 at 10:18
not working yet for the case
– billyjov
Nov 19 '18 at 10:21
Yes, I think you need to wrap upchainin method or check value how you get with chain
– Konstantin Okhotnick
Nov 19 '18 at 12:37
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You can create mock Object for underscore.
import _ from './test-data/UnderscoreMock';
And use UnderscoreMock:
./test-data/UnderscoreMock
export default const _ {
chain: () => {}
....
}
and set UnderscoreMock in component.
Second you can use spyOn into component.
spyOn(INSTANCE_COMPONENT, "chain");
answered Nov 19 '18 at 10:02
Konstantin OkhotnickKonstantin Okhotnick
1,300920
always get an undefined
– billyjov
Nov 19 '18 at 10:13
can tryingconst spyChain = (window._, 'chain').and.callFake(() => {})
– Konstantin Okhotnick
Nov 19 '18 at 10:16
andexpect(spyChain.chain).toHaveBeenCalled();
– Konstantin Okhotnick
Nov 19 '18 at 10:18
not working yet for the case
– billyjov
Nov 19 '18 at 10:21
Yes, I think you need to wrap upchainin method or check value how you get with chain
– Konstantin Okhotnick
Nov 19 '18 at 12:37
add a comment |
You can create mock Object for underscore.
import _ from './test-data/UnderscoreMock';
And use UnderscoreMock:
./test-data/UnderscoreMock
export default const _ {
chain: () => {}
....
}
and set UnderscoreMock in component.
Second you can use spyOn into component.
spyOn(INSTANCE_COMPONENT, "chain");
answered Nov 19 '18 at 10:02
Konstantin OkhotnickKonstantin Okhotnick
1,300920
always get an undefined
– billyjov
Nov 19 '18 at 10:13
can tryingconst spyChain = (window._, 'chain').and.callFake(() => {})
– Konstantin Okhotnick
Nov 19 '18 at 10:16
andexpect(spyChain.chain).toHaveBeenCalled();
– Konstantin Okhotnick
Nov 19 '18 at 10:18
not working yet for the case
– billyjov
Nov 19 '18 at 10:21
Yes, I think you need to wrap upchainin method or check value how you get with chain
– Konstantin Okhotnick
Nov 19 '18 at 12:37
add a comment |
You can create mock Object for underscore.
import _ from './test-data/UnderscoreMock';
And use UnderscoreMock:
./test-data/UnderscoreMock
export default const _ {
chain: () => {}
....
}
and set UnderscoreMock in component.
Second you can use spyOn into component.
spyOn(INSTANCE_COMPONENT, "chain");
answered Nov 19 '18 at 10:02
Konstantin OkhotnickKonstantin Okhotnick
1,300920
You can create mock Object for underscore.
import _ from './test-data/UnderscoreMock';
And use UnderscoreMock:
./test-data/UnderscoreMock
export default const _ {
chain: () => {}
....
}
and set UnderscoreMock in component.
Second you can use spyOn into component.
spyOn(INSTANCE_COMPONENT, "chain");
answered Nov 19 '18 at 10:02
Konstantin OkhotnickKonstantin Okhotnick
1,300920
answered Nov 19 '18 at 10:02
Konstantin OkhotnickKonstantin Okhotnick
1,300920
answered Nov 19 '18 at 10:02
Konstantin OkhotnickKonstantin Okhotnick
1,300920
answered Nov 19 '18 at 10:02
Konstantin OkhotnickKonstantin Okhotnick
1,300920
1,300920
always get an undefined
– billyjov
Nov 19 '18 at 10:13
can tryingconst spyChain = (window._, 'chain').and.callFake(() => {})
– Konstantin Okhotnick
Nov 19 '18 at 10:16
andexpect(spyChain.chain).toHaveBeenCalled();
– Konstantin Okhotnick
Nov 19 '18 at 10:18
not working yet for the case
– billyjov
Nov 19 '18 at 10:21
Yes, I think you need to wrap upchainin method or check value how you get with chain
– Konstantin Okhotnick
Nov 19 '18 at 12:37
add a comment |
always get an undefined
– billyjov
Nov 19 '18 at 10:13
can tryingconst spyChain = (window._, 'chain').and.callFake(() => {})
– Konstantin Okhotnick
Nov 19 '18 at 10:16
andexpect(spyChain.chain).toHaveBeenCalled();
– Konstantin Okhotnick
Nov 19 '18 at 10:18
not working yet for the case
– billyjov
Nov 19 '18 at 10:21
Yes, I think you need to wrap upchainin method or check value how you get with chain
– Konstantin Okhotnick
Nov 19 '18 at 12:37
always get an undefined
– billyjov
Nov 19 '18 at 10:13
always get an undefined
– billyjov
Nov 19 '18 at 10:13
can trying
const spyChain = (window._, 'chain').and.callFake(() => {})– Konstantin Okhotnick
Nov 19 '18 at 10:16
can trying
const spyChain = (window._, 'chain').and.callFake(() => {})– Konstantin Okhotnick
Nov 19 '18 at 10:16
and
expect(spyChain.chain).toHaveBeenCalled();– Konstantin Okhotnick
Nov 19 '18 at 10:18
and
expect(spyChain.chain).toHaveBeenCalled();– Konstantin Okhotnick
Nov 19 '18 at 10:18
not working yet for the case
– billyjov
Nov 19 '18 at 10:21
not working yet for the case
– billyjov
Nov 19 '18 at 10:21
Yes, I think you need to wrap up
chain in method or check value how you get with chain– Konstantin Okhotnick
Nov 19 '18 at 12:37
Yes, I think you need to wrap up
chain in method or check value how you get with chain– Konstantin Okhotnick
Nov 19 '18 at 12:37
add a comment |
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