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jest-snapshot: Omit irrelevant received properties when property matchers fail #9198

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merged 5 commits into from Nov 17, 2019

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pedrottimark
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Summary

Call getObjectSubset to be consistent with toMatchObject

  • a subset helps if a property is missing or obsolete however, there are bogus changes for the properties that match
  • although a subset hides the problem if there is a change to a key of a property, a minified serialization or even complete line diff of Expected properties versus Received value can also hide the problem in a mess of irrelevant details

Because the long-term solution is data-driven diff, please forgive a temporary hack to import getObjectSubset which is a private helper function of the expect package

Simen, when I wrote 'expect/src/utils' the package tests ran okay, but the example test outside Jest threw an error, so is this correct instead:

import {getObjectSubset} from 'expect/build/utils';

Test plan

In printSnapshot.test.ts

  • updated 3 snapshots
  • added 1 snapshot

Example picture baseline at left and improved at right

omit missing properties

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codecov-io commented Nov 17, 2019

Codecov Report

Merging #9198 into master will not change coverage.
The diff coverage is n/a.

Impacted file tree graph

@@           Coverage Diff           @@
##           master    #9198   +/-   ##
=======================================
  Coverage   64.83%   64.83%           
=======================================
  Files         279      279           
  Lines       11742    11742           
  Branches     2887     2886    -1     
=======================================
  Hits         7613     7613           
  Misses       3511     3511           
  Partials      618      618
Impacted Files Coverage Δ
packages/jest-snapshot/src/printSnapshot.ts 100% <ø> (ø) ⬆️

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@@ -6,6 +6,7 @@
*/

import chalk = require('chalk');
import {getObjectSubset} from 'expect/build/utils';
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this is correct, yeah

CHANGELOG.md Outdated Show resolved Hide resolved
@pedrottimark pedrottimark changed the title jest-snapshot: Omit irrelevant received properties jest-snapshot: Omit irrelevant received properties when property matchers fail Nov 17, 2019
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Wonderful, thank you!

@pedrottimark pedrottimark merged commit 8d0b5e2 into jestjs:master Nov 17, 2019
@pedrottimark pedrottimark deleted the snapshot-properties branch November 17, 2019 21:28
ayush000 added a commit to ayush000/jest that referenced this pull request Nov 21, 2019
* master:
  chore: upgrade to fsevents 2 (jestjs#9215)
  docs: remove expect.assertions(1) in rejects example of Tutoria… (jestjs#9149)
  chore: bump to istanbul alphas (jestjs#9192)
  Fix typo in JestPlatform.md (jestjs#9212)
  jest-snapshot: Ignore indentation for most serialized objects (jestjs#9203)
  fix(jest-types): tighten Config types and set more defaults (jestjs#9200)
  jest-snapshot: Improve colors when snapshots are updatable (jestjs#9132)
  jest-snapshot: Omit irrelevant received properties when property matchers fail (jestjs#9198)
  chore: make changedFiles option optional in `shouldInstrument` (jestjs#9197)
  fix(pretty-format): correctly detect memo (jestjs#9196)
  chore: regenerate lockfiles in e2e tests (jestjs#9193)
  chore: bump handlebars
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4 participants