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fix(language-service): reset MockHost after every spec instead of creating new LS #33200

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@kyliau kyliau commented Oct 16, 2019

This commit speeds up the tests by calling `MockHost.reset()` in
`beforeEach()` instead of destroying the entire language service and
creating a new one. The creation of a new language service instance is
expensive due to the need to initialize many core Symbols when creating
a new program.

This speeds ups the test (on my local machine) from 35 secs to 15 secs.

PR Checklist

Please check if your PR fulfills the following requirements:

PR Type

What kind of change does this PR introduce?

  • Bugfix
  • Feature
  • Code style update (formatting, local variables)
  • Refactoring (no functional changes, no api changes)
  • Build related changes
  • CI related changes
  • Documentation content changes
  • angular.io application / infrastructure changes
  • Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

  • Yes
  • No

Other information

@kyliau kyliau requested a review from a team as a code owner October 16, 2019 19:11
@kyliau kyliau added area: language-service Issues related to Angular's VS Code language service target: major This PR is targeted for the next major release labels Oct 16, 2019
@ngbot ngbot bot added this to the needsTriage milestone Oct 16, 2019
@kyliau kyliau requested a review from ayazhafiz October 16, 2019 19:13
…ating new LS

This commit speeds up the tests by calling `MockHost.reset()` in
`beforeEach()` instead of destroying the entire language service and
creating a new one. The creation of a new language service instance is
expensive due to the need to initialize many core Symbols when creating
a new program.

This speeds ups the test (on my local machine) from 35 secs to 15 secs.
@kyliau kyliau added the action: merge The PR is ready for merge by the caretaker label Oct 16, 2019
@matsko matsko closed this in 43241a5 Oct 16, 2019
matsko pushed a commit that referenced this pull request Oct 16, 2019
…ating new LS (#33200)

This commit speeds up the tests by calling `MockHost.reset()` in
`beforeEach()` instead of destroying the entire language service and
creating a new one. The creation of a new language service instance is
expensive due to the need to initialize many core Symbols when creating
a new program.

This speeds ups the test (on my local machine) from 35 secs to 15 secs.

PR Close #33200
ODAVING pushed a commit to ODAVING/angular that referenced this pull request Oct 18, 2019
ODAVING pushed a commit to ODAVING/angular that referenced this pull request Oct 18, 2019
…ating new LS (angular#33200)

This commit speeds up the tests by calling `MockHost.reset()` in
`beforeEach()` instead of destroying the entire language service and
creating a new one. The creation of a new language service instance is
expensive due to the need to initialize many core Symbols when creating
a new program.

This speeds ups the test (on my local machine) from 35 secs to 15 secs.

PR Close angular#33200
AndrusGerman pushed a commit to AndrusGerman/angular that referenced this pull request Oct 22, 2019
AndrusGerman pushed a commit to AndrusGerman/angular that referenced this pull request Oct 22, 2019
…ating new LS (angular#33200)

This commit speeds up the tests by calling `MockHost.reset()` in
`beforeEach()` instead of destroying the entire language service and
creating a new one. The creation of a new language service instance is
expensive due to the need to initialize many core Symbols when creating
a new program.

This speeds ups the test (on my local machine) from 35 secs to 15 secs.

PR Close angular#33200
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@kyliau kyliau deleted the test_utils branch December 17, 2019 20:35
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3 participants