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istanbul.report.test.ts
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istanbul.report.test.ts
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/*
* Istanbul coverage provider specific test cases
*/
import { expect, test } from 'vitest'
import { readCoverageJson } from './utils'
test('istanbul json report', async () => {
const jsonReport = await readCoverageJson()
// If this fails, you can use "npx live-server@1.2.1 ./coverage" to see coverage report
expect(jsonReport).toMatchSnapshot()
})
test('implicit else is included in branch count', async () => {
const coverageMap = await readCoverageJson()
const filename = '<process-cwd>/src/implicitElse.ts'
const fileCoverage = coverageMap[filename]
expect(fileCoverage.b).toHaveProperty('0')
expect(fileCoverage.b['0']).toHaveLength(2)
})
test('ignored code is excluded from the report', async () => {
const functionName = 'ignoredFunction'
const filename = '<process-cwd>/src/utils.ts'
const coverageMap = await readCoverageJson()
const fileCoverage = coverageMap[filename]
// Function should not be included in report
const functionCoverage = Object.values(fileCoverage.fnMap).find(fn => fn.name === functionName)
expect(functionCoverage).toBe(undefined)
// Function should still be found from the actual sources
const utils = await import('../src/utils')
expect(utils[functionName]).toBeTypeOf('function')
})