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language-service.spec.ts
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language-service.spec.ts
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import { removeSync, writeFileSync } from 'fs-extra'
import { makeCompiler } from '../__helpers__/fakers'
import { logTargetMock } from '../__helpers__/mocks'
import { tempDir } from '../__helpers__/path'
import ProcessedSource from '../__helpers__/processed-source'
import { normalizeSlashes } from '../util/normalize-slashes'
import * as compilerUtils from './compiler-utils'
const logTarget = logTargetMock()
describe('Language service', () => {
beforeEach(() => {
logTarget.clear()
})
it('should get compile result from referenced project when there is a built reference project', () => {
const tmp = tempDir('compiler')
const compiler = makeCompiler({
jestConfig: { cache: true, cacheDirectory: tmp },
tsJestConfig: { tsConfig: false },
})
const source = 'console.log("hello")'
const fileName = 'test-reference-project.ts'
const getAndCacheProjectReferenceSpy = jest
.spyOn(compilerUtils, 'getAndCacheProjectReference')
.mockReturnValueOnce({} as any)
jest
.spyOn(compilerUtils, 'getCompileResultFromReferencedProject')
.mockImplementationOnce(() => [
source,
'{"version":3,"file":"test-reference-project.js","sourceRoot":"","sources":["test-reference-project.ts"],"names":[],"mappings":"AAAA,OAAO,CAAC,GAAG,CAAC,OAAO,CAAC,CAAA","sourcesContent":["console.log(\\"hello\\")"]}',
])
writeFileSync(fileName, source, 'utf8')
compiler.compile(source, fileName)
expect(getAndCacheProjectReferenceSpy).toHaveBeenCalled()
expect(compilerUtils.getCompileResultFromReferencedProject).toHaveBeenCalled()
jest.restoreAllMocks()
removeSync(fileName)
})
it('should get compile result from language service when there is no referenced project', () => {
const tmp = tempDir('compiler')
const compiler = makeCompiler({
jestConfig: { cache: true, cacheDirectory: tmp },
tsJestConfig: { tsConfig: false },
})
const source = 'console.log("hello")'
const fileName = 'test-no-reference-project.ts'
const getAndCacheProjectReferenceSpy = jest
.spyOn(compilerUtils, 'getAndCacheProjectReference')
.mockReturnValueOnce(undefined)
jest.spyOn(compilerUtils, 'getCompileResultFromReferencedProject')
writeFileSync(fileName, source, 'utf8')
compiler.compile(source, fileName)
expect(getAndCacheProjectReferenceSpy).toHaveBeenCalled()
expect(compilerUtils.getCompileResultFromReferencedProject).not.toHaveBeenCalled()
jest.restoreAllMocks()
removeSync(fileName)
})
it('should cache resolved modules for test file with testMatchPatterns from jest config when match', () => {
// tslint:disable-next-line:no-empty
const spy = jest.spyOn(compilerUtils, 'cacheResolvedModules').mockImplementationOnce(() => {})
const tmp = tempDir('compiler')
const compiler = makeCompiler({
jestConfig: { cache: true, cacheDirectory: tmp, testRegex: [/.*\.(spec|test)\.[jt]sx?$/] as any[] },
tsJestConfig: { tsConfig: false },
})
const fileName = 'src/__mocks__/main.spec.ts'
const source = `import { Thing } from './main'
export const thing: Thing = { a: 1 }`
compiler.compile(source, fileName)
expect(spy).toHaveBeenCalled()
expect(spy.mock.calls[0][0]).toEqual(normalizeSlashes(fileName))
expect(spy.mock.calls[0][1]).toEqual(source)
spy.mockRestore()
})
it(`shouldn't cache resolved modules for test file with testMatchPatterns from jest config when not match`, () => {
// tslint:disable-next-line:no-empty
jest.spyOn(compilerUtils, 'cacheResolvedModules').mockImplementationOnce(() => {})
const tmp = tempDir('compiler')
const compiler = makeCompiler({
jestConfig: { cache: true, cacheDirectory: tmp, testRegex: [/.*\.(foo|bar)\.[jt]sx?$/] as any[] },
tsJestConfig: { tsConfig: false },
})
const fileName = 'src/__mocks__/main.spec.ts'
const source = `import { Thing } from './main'
export const thing: Thing = { a: 1 }`
compiler.compile(source, fileName)
expect(compilerUtils.cacheResolvedModules).not.toHaveBeenCalled()
})
it('should compile js file for allowJs true with outDir', () => {
const fileName = `test-allow-js-with-outDir.js`
const compiler = makeCompiler({
tsJestConfig: { tsConfig: { allowJs: true, outDir: '$$foo$$' } },
})
const source = 'export default 42'
writeFileSync(fileName, source, 'utf8')
const compiled = compiler.compile(source, fileName)
expect(new ProcessedSource(compiled, fileName)).toMatchSnapshot()
removeSync(fileName)
})
it('should compile js file for allowJs true without outDir', () => {
const fileName = `test-allow-js-no-outDir.js`
const compiler = makeCompiler({
tsJestConfig: { tsConfig: { allowJs: true } },
})
const source = 'export default 42'
writeFileSync(fileName, source, 'utf8')
const compiled = compiler.compile(source, fileName)
expect(new ProcessedSource(compiled, fileName)).toMatchSnapshot()
removeSync(fileName)
})
it('should compile tsx file for jsx preserve', () => {
const fileName = 'test-jsx-preserve.tsx'
const compiler = makeCompiler({
tsJestConfig: {
tsConfig: {
jsx: 'preserve' as any,
},
},
})
const source = `
const App = () => {
return <>Test</>
}
`
writeFileSync(fileName, source, 'utf8')
const compiled = compiler.compile(source, fileName)
expect(new ProcessedSource(compiled, fileName)).toMatchSnapshot()
removeSync(fileName)
})
it('should compile tsx file for other jsx options', () => {
const fileName = 'test-jsx-options.tsx'
const compiler = makeCompiler({
tsJestConfig: {
tsConfig: {
jsx: 'react' as any,
},
},
})
const source = `
const App = () => {
return <>Test</>
}
`
writeFileSync(fileName, source, 'utf8')
const compiled = compiler.compile(source, fileName)
expect(new ProcessedSource(compiled, fileName)).toMatchSnapshot()
removeSync(fileName)
})
it('should have correct source maps', () => {
const compiler = makeCompiler({ tsJestConfig: { tsConfig: false } })
const source = 'const gsm = (v: number) => v\nconst h: number = gsm(5)'
const fileName = 'test-source-map.ts'
writeFileSync(fileName, source, 'utf8')
const compiled = compiler.compile(source, fileName)
expect(new ProcessedSource(compiled, fileName).outputSourceMaps).toMatchObject({
file: fileName,
sources: [fileName],
sourcesContent: [source],
})
removeSync(fileName)
})
it('should report diagnostics related to typings with pathRegex config matches file name', () => {
const fileName = 'test-match-regex-diagnostics.ts'
const source = `
const g = (v: number) => v
const x: string = g(5)
`
const compiler = makeCompiler({
tsJestConfig: { tsConfig: false, diagnostics: { pathRegex: fileName } },
})
writeFileSync(fileName, source, 'utf8')
expect(() => compiler.compile(source, fileName)).toThrowErrorMatchingSnapshot()
removeSync(fileName)
})
it('should not report diagnostics related to typings with pathRegex config does not match file name', () => {
const fileName = 'test-non-match-regex-diagnostics.ts'
const source = `
const f = (v: number) => v
const t: string = f(5)
`
const compiler = makeCompiler({
tsJestConfig: { tsConfig: false, diagnostics: { pathRegex: 'bar.ts' } },
})
writeFileSync(fileName, source, 'utf8')
expect(() => compiler.compile(source, fileName)).not.toThrowError()
removeSync(fileName)
})
it('should throw error when cannot compile', () => {
const fileName = 'test-cannot-compile.d.ts'
const source = `
interface Foo {
a: string
}
`
const compiler = makeCompiler({
tsJestConfig: { tsConfig: false },
})
writeFileSync(fileName, source, 'utf8')
expect(() => compiler.compile(source, fileName)).toThrowErrorMatchingSnapshot()
removeSync(fileName)
})
})