javascript - React Enzyme get all classes even if passed by other components - Stack Overflow

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Say I have

const BaseComponent = (props) => {
    const classNames = ['base-ponent', props.className];
    return (
        <div className={classNames.join(' ')}>
            {props.children}
        </div>
    )
};

const SomeComponent = () => {
    return (
        <BaseComponent
            className="foo-bar"
        >
            Hello
        </BaseComponent>
    );
}

The rendered dom here would be <div class="base-ponent foo-bar">Hello</div>

Now, if I shallow mount SomeComponent and test the classes, only foo-bar is available:

const dom = shallow(<SomeComponent/>);
console.log(dom.hassClass('base-ponent')); // es out as false

I understand that only foo-bar was passed as the class to SomeComponent but how do I validate all other classes here too?

Say I have

const BaseComponent = (props) => {
    const classNames = ['base-ponent', props.className];
    return (
        <div className={classNames.join(' ')}>
            {props.children}
        </div>
    )
};

const SomeComponent = () => {
    return (
        <BaseComponent
            className="foo-bar"
        >
            Hello
        </BaseComponent>
    );
}

The rendered dom here would be <div class="base-ponent foo-bar">Hello</div>

Now, if I shallow mount SomeComponent and test the classes, only foo-bar is available:

const dom = shallow(<SomeComponent/>);
console.log(dom.hassClass('base-ponent')); // es out as false

I understand that only foo-bar was passed as the class to SomeComponent but how do I validate all other classes here too?

• javascript
• reactjs
• enzyme

Share Improve this question Follow asked Jan 8, 2018 at 19:30 KoushaKousha 36.4k5959 gold badges188188 silver badges314314 bronze badges

Add a ment  | 

2 Answers 2

Sorted by: Reset to default 4

What if you use the .prop API.

expect(dom.find('div').prop('className'))
  .to.be.equal('base-ponent foo-bar');

shallow() does only render the top level ponent which does not include your other class. You can use dive() to let it render the one ponent one level deeper. dive() renders the only one non-DOM child of the wrapper it was called on.

const dom = shallow(<SomeComponent/>);
console.log(dom.dive().hasClass('base-ponent')); // now es out as true

If you want inspect the whole DOM you will have to use render() instead of shallow().

Also not that a call to html() on a ShallowWrapper will always return the markup of a full render no matter if it was a shallow render or not.

Say I have

const BaseComponent = (props) => {
    const classNames = ['base-ponent', props.className];
    return (
        <div className={classNames.join(' ')}>
            {props.children}
        </div>
    )
};

const SomeComponent = () => {
    return (
        <BaseComponent
            className="foo-bar"
        >
            Hello
        </BaseComponent>
    );
}

The rendered dom here would be <div class="base-ponent foo-bar">Hello</div>

Now, if I shallow mount SomeComponent and test the classes, only foo-bar is available:

const dom = shallow(<SomeComponent/>);
console.log(dom.hassClass('base-ponent')); // es out as false

I understand that only foo-bar was passed as the class to SomeComponent but how do I validate all other classes here too?

Say I have

const BaseComponent = (props) => {
    const classNames = ['base-ponent', props.className];
    return (
        <div className={classNames.join(' ')}>
            {props.children}
        </div>
    )
};

const SomeComponent = () => {
    return (
        <BaseComponent
            className="foo-bar"
        >
            Hello
        </BaseComponent>
    );
}

The rendered dom here would be <div class="base-ponent foo-bar">Hello</div>

Now, if I shallow mount SomeComponent and test the classes, only foo-bar is available:

const dom = shallow(<SomeComponent/>);
console.log(dom.hassClass('base-ponent')); // es out as false

I understand that only foo-bar was passed as the class to SomeComponent but how do I validate all other classes here too?

• javascript
• reactjs
• enzyme

Share Improve this question Follow asked Jan 8, 2018 at 19:30 KoushaKousha 36.4k5959 gold badges188188 silver badges314314 bronze badges

Add a ment  | 

2 Answers 2

Sorted by: Reset to default 4

What if you use the .prop API.

expect(dom.find('div').prop('className'))
  .to.be.equal('base-ponent foo-bar');

shallow() does only render the top level ponent which does not include your other class. You can use dive() to let it render the one ponent one level deeper. dive() renders the only one non-DOM child of the wrapper it was called on.

const dom = shallow(<SomeComponent/>);
console.log(dom.dive().hasClass('base-ponent')); // now es out as true

If you want inspect the whole DOM you will have to use render() instead of shallow().

Also not that a call to html() on a ShallowWrapper will always return the markup of a full render no matter if it was a shallow render or not.

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