Why is this is undefined when mocking event in React unit testing, using sinon.spy to mock function and enzyme.shallow render for React Component?
Whenever I try to simulate an event where I am passing the event object, I am getting that this is undefined.
const onBlur = sinon.spy(Input.prototype.handleBlur);
const wrapper = shallow(<Input handleBlur=onBlur />);
//...
wrapper.find('input').simulate('blur', target: value: '' );
Inside of the handleBlur method, this is undefined. However, if I decide not to mock the event object, then event is undefined.
Also, I tried using mount instead:
const wrapper = shallow(<Input handleBlur=onBlur />);
But, it's the same thing. However, I couldn't even get to that point until I updated the npm libraries.
javascript reactjs unit-testing sinon enzyme
asked Nov 13 '18 at 21:26
Michael M. AdkinsMichael M. Adkins
112110
add a comment |
Whenever I try to simulate an event where I am passing the event object, I am getting that this is undefined.
const onBlur = sinon.spy(Input.prototype.handleBlur);
const wrapper = shallow(<Input handleBlur=onBlur />);
//...
wrapper.find('input').simulate('blur', target: value: '' );
Inside of the handleBlur method, this is undefined. However, if I decide not to mock the event object, then event is undefined.
Also, I tried using mount instead:
const wrapper = shallow(<Input handleBlur=onBlur />);
But, it's the same thing. However, I couldn't even get to that point until I updated the npm libraries.
javascript reactjs unit-testing sinon enzyme
asked Nov 13 '18 at 21:26
Michael M. AdkinsMichael M. Adkins
112110
add a comment |
Whenever I try to simulate an event where I am passing the event object, I am getting that this is undefined.
const onBlur = sinon.spy(Input.prototype.handleBlur);
const wrapper = shallow(<Input handleBlur=onBlur />);
//...
wrapper.find('input').simulate('blur', target: value: '' );
Inside of the handleBlur method, this is undefined. However, if I decide not to mock the event object, then event is undefined.
Also, I tried using mount instead:
const wrapper = shallow(<Input handleBlur=onBlur />);
But, it's the same thing. However, I couldn't even get to that point until I updated the npm libraries.
javascript reactjs unit-testing sinon enzyme
asked Nov 13 '18 at 21:26
Michael M. AdkinsMichael M. Adkins
112110
Whenever I try to simulate an event where I am passing the event object, I am getting that this is undefined.
const onBlur = sinon.spy(Input.prototype.handleBlur);
const wrapper = shallow(<Input handleBlur=onBlur />);
//...
wrapper.find('input').simulate('blur', target: value: '' );
Inside of the handleBlur method, this is undefined. However, if I decide not to mock the event object, then event is undefined.
Also, I tried using mount instead:
const wrapper = shallow(<Input handleBlur=onBlur />);
But, it's the same thing. However, I couldn't even get to that point until I updated the npm libraries.
javascript reactjs unit-testing sinon enzyme
javascript reactjs unit-testing sinon enzyme
asked Nov 13 '18 at 21:26
Michael M. AdkinsMichael M. Adkins
112110
asked Nov 13 '18 at 21:26
Michael M. AdkinsMichael M. Adkins
112110
edited Nov 14 '18 at 16:48
Michael M. Adkins
asked Nov 13 '18 at 21:26
Michael M. AdkinsMichael M. Adkins
112110
asked Nov 13 '18 at 21:26
Michael M. AdkinsMichael M. Adkins
112110
asked Nov 13 '18 at 21:26
Michael M. AdkinsMichael M. Adkins
112110
112110
add a comment |
add a comment |
1 Answer
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votes
try using
const onBlur = sinon.spy(Input.prototype, "handleBlur");
instead
const onBlur = sinon.spy(Input.prototype.handleBlur);
answered Nov 13 '18 at 22:56
user1705722user1705722
91
I tried that. It's the same problem either way.
– Michael M. Adkins
Nov 14 '18 at 16:47
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
try using
const onBlur = sinon.spy(Input.prototype, "handleBlur");
instead
const onBlur = sinon.spy(Input.prototype.handleBlur);
answered Nov 13 '18 at 22:56
user1705722user1705722
91
I tried that. It's the same problem either way.
– Michael M. Adkins
Nov 14 '18 at 16:47
add a comment |
try using
const onBlur = sinon.spy(Input.prototype, "handleBlur");
instead
const onBlur = sinon.spy(Input.prototype.handleBlur);
answered Nov 13 '18 at 22:56
user1705722user1705722
91
I tried that. It's the same problem either way.
– Michael M. Adkins
Nov 14 '18 at 16:47
add a comment |
try using
const onBlur = sinon.spy(Input.prototype, "handleBlur");
instead
const onBlur = sinon.spy(Input.prototype.handleBlur);
answered Nov 13 '18 at 22:56
user1705722user1705722
91
try using
const onBlur = sinon.spy(Input.prototype, "handleBlur");
instead
const onBlur = sinon.spy(Input.prototype.handleBlur);
answered Nov 13 '18 at 22:56
user1705722user1705722
91
answered Nov 13 '18 at 22:56
user1705722user1705722
91
answered Nov 13 '18 at 22:56
user1705722user1705722
91
answered Nov 13 '18 at 22:56
user1705722user1705722
91
91
I tried that. It's the same problem either way.
– Michael M. Adkins
Nov 14 '18 at 16:47
add a comment |
I tried that. It's the same problem either way.
– Michael M. Adkins
Nov 14 '18 at 16:47
I tried that. It's the same problem either way.
– Michael M. Adkins
Nov 14 '18 at 16:47
I tried that. It's the same problem either way.
– Michael M. Adkins
Nov 14 '18 at 16:47
add a comment |
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