Fix example code on using matchers docs

[iamrahulroy]

Summary

The code snippet using on 'Using Matchers' docs under Exceptions section is broken.

The code snippet is using, ConfigError inside compileAndroidCode function. Running the test, throws following error ReferenceError: ConfigError is not defined.

Fix

I have changed, ConfigError to generic Error.

So the original snippet of code now looks like this:

function compileAndroidCode() {
  throw new Error('you are using the wrong JDK');
}

test('compiling android goes as expected', () => {
  expect(compileAndroidCode).toThrow();
  expect(compileAndroidCode).toThrow(Error);

  // You can also use the exact error message or a regexp
  expect(compileAndroidCode).toThrow('you are using the wrong JDK');
  expect(compileAndroidCode).toThrow(/JDK/);
});

Alternatively, a TypeError can be thrown, but that'll significantly change the example code. I have refrained myself from doing that, but here's snippet I would have used:

function compileAndCheckForType() {
  throw new TypeError('you are using the wrong type.');
}

test('compiling android goes as expected', () => {
  expect(compileAndCheckForType).toThrow();
  expect(compileAndCheckForType).toThrow(TypeError);

  // You can also use the exact error message or a regexp
  expect(compileAndCheckForType).toThrow('you are using the wrong type.');
  expect(compileAndCheckForType).toThrow(/type/);
});

Let me know if the changelog is required to be update for this PR.

Test plan

Not Applicable?

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[codecov-io]

Codecov Report

Merging #8953 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #8953   +/-   ##
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  Coverage   64.25%   64.25%           
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  Files         276      276           
  Lines       11706    11706           
  Branches     2865     2866    +1     
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  Hits         7522     7522           
  Misses       3552     3552           
  Partials      632      632

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[SimenB]

Thanks!

Could you update https://github.com/facebook/jest/blob/master/website/versioned_docs/version-22.x/UsingMatchers.md as well?

[iamrahulroy]

@SimenB Thanks for quick response. Submitted the additional request change.

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