CODEWITHSUNDEEP
reactjsjestjsenzymereselect
Jonathan
Jonathan

Reputation: 469

How to test with the reselect createSelector function in jest?

Hello I'm trying to test the createSelector function in jest but I'm stuck. So the problem is that never enters in the if of the function getContent and I need to enter, for the coverage.

File 

export const selectDetailsObject = createSelector(
    [
        (state) => state.objectId,
        (state) => state.objects,
    ],
    (
        objectId,
        objects,
    ) => getContent(objectId, objects)
)

function getContent (objectId, objects) {
    const result = {}
    if (objectId && objectId !== '') {
        result.objectId = objectId
        result.objectInfo = objects[objectId]
        result.objectDetails = objectDetails[objectId]
    }
    return result
}

Testing file

const mockStore = () => ({
    objectId: '123',
    objects: {},
})

test('should select the content of the table', () => {
    const result = selectDetailsObject(mockStore)
    expect(result.objects).toBe()
})

Any suggestions?

Upvotes: 2

Views: 4628

Answers (1)

Will Jenkins
Will Jenkins

Reputation: 9887

selectDetailsObject needs a state object, not a function. So you can either just create a mockStore object, or call it when you hand it in:

const mockStore = () => ({
    objectId: '123',
    objects: {},
})

test('should select the content of the table', () => {
    const result = selectDetailsObject(mockStore())
    expect(result.objects).toBe()
})

Upvotes: 2

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