Support coverage['100'] in @vitest/coverage-istanbul

[AriPerkkio]

Clear and concise description of the problem

Add support for passing 100: true for @vitest/coverage-istanbul. This is currently supported by @vitest/coverage-v8. It is a shorthand for setting other threshold values to 100.

Suggested solution

{
  test: {
    coverage: {
      provider: 'istanbul',
      100: true,
    }
  }
}

Alternative

It's equal to configuration below. Typically this is used as quick CLI option --coverage.100=true:

{
  test: {
    coverage: {
      provider: 'istanbul',
      lines: 100,
      statements: 100,
      branches: 100,
      functions: 100,
    },
  }
}

Additional context

vitest/packages/coverage-v8/src/provider.ts

Lines 68 to 71 in 158c4bb

	lines: config['100'] ? 100 : config.lines,
	functions: config['100'] ? 100 : config.functions,
	branches: config['100'] ? 100 : config.branches,
	statements: config['100'] ? 100 : config.statements,

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.