feature - update a specific part of a snapshot

[nellobrunelli]

Hi Jest's guys, how are you?
I'd like to use Jest snapshots for my reducers (not only for my .jsx components).

The test would be something like:

describe.only('Dialog Reducer', () => {

    test(type.DIALOG_START, () => {
        expect(
            dialog('Test one', {
                type: type.DIALOG_START
            })).toEqual({
                active: true,
                text: 'Hi mom'
            });
    });

    test(type.DIALOG_END, () => {
        expect(
            dialog('Test two', {
                type: type.DIALOG_END
            })).toMatchSnapshot();
    });
});

There are two tests inside one script. The snapshot would be something like:

// Jest Snapshot v1, https://goo.gl/fbAQLP

exports[`Dialog Reducers DIALOG_START`] = `
Object {
  "active": false,
  "text": 'Hi Mom',
}
`;

exports[`Dialog Reducers DIALOG_END`] = `
Object {
  "active": false,
  "text": null,
}
`;

Suppose that both tests fail I would fix them one by one. After every fix I might need to update the snapshot just for one test. But it looks like there isn't this chance because the command update the entire snapshot.

http://facebook.github.io/jest/docs/cli.html#updatesnapshot

[thymikee]

Thanks, we're good, busy changing names and stuff 😉 cc: @cpojer @aaronabramov

There's a work in progress PR handling this, but it looks like it won't ship too early: #3831
We also track the issue here: #1798
Closing as a duplicate.

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