add type exports to the JSON reporter

[david-morris]

Clear and concise description of the problem

I want to summarize json vitest output in my CI using typescript. I want to import types for IDE functionality and the ability to type-check my summary script.

Suggested solution

Export the existing types so that they could be imported from "vitest/reporters".

Alternative

Factor a helper out of logTasks method of JsonReporter so that we can use indexed types for the JSON contents

Additional context

This change would make it possible to type-check for any changes to the json format affecting an automated system reading that json output.

Keep in mind that there's no "vitest/reporters/json" because of the build step.

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.

[hi-ogawa]

Exposing the type sounds like a nice addition to me.

For the time being, I think you can manually copy-paste types from here since these types are self-contained:

vitest/packages/vitest/src/node/reporters/json.ts

Lines 13 to 63 in 315325e

	type Status = 'passed' | 'failed' | 'skipped' | 'pending' | 'todo' | 'disabled'
	type Milliseconds = number
	interface Callsite { line: number; column: number }
	const StatusMap: Record<TaskState, Status> = {
	fail: 'failed',
	only: 'pending',
	pass: 'passed',
	run: 'pending',
	skip: 'skipped',
	todo: 'todo',
	}
	interface FormattedAssertionResult {
	ancestorTitles: Array<string>
	fullName: string
	status: Status
	title: string
	duration?: Milliseconds | null
	failureMessages: Array<string>
	location?: Callsite | null
	}
	interface FormattedTestResult {
	message: string
	name: string
	status: 'failed' | 'passed'
	startTime: number
	endTime: number
	assertionResults: Array<FormattedAssertionResult>
	// summary: string
	// coverage: unknown
	}
	interface FormattedTestResults {
	numFailedTests: number
	numFailedTestSuites: number
	numPassedTests: number
	numPassedTestSuites: number
	numPendingTests: number
	numPendingTestSuites: number
	numTodoTests: number
	numTotalTests: number
	numTotalTestSuites: number
	startTime: number
	success: boolean
	testResults: Array<FormattedTestResult>
	// coverageMap?: CoverageMap | null | undefined
	// numRuntimeErrorTestSuites: number
	// snapshot: SnapshotSummary
	// wasInterrupted: boolean
	}

Example https://stackblitz.com/edit/vitest-dev-vitest-6eyewm?file=example.ts