bigint-mod-arith/build/testing/mocha/builders/TestsBuilder.js

96 lines
3.2 KiB
JavaScript

const path = require('path')
const fs = require('fs')
const ts = require('typescript')
const JSON5 = require('json5')
const Builder = require('./Builder.js')
const rootDir = path.join(__dirname, '../../../../')
const mochaTsRelativeDir = '.mocha-ts'
const mochaTsDir = path.join(rootDir, mochaTsRelativeDir)
const formatHost = {
getCanonicalFileName: path => path,
getCurrentDirectory: ts.sys.getCurrentDirectory,
getNewLine: () => ts.sys.newLine
}
module.exports = class TestsBuilder extends Builder {
constructor ({ name = 'tsc', configPath = path.join(rootDir, 'tsconfig.json'), tempDir = mochaTsDir }) {
super(path.join(tempDir, 'semaphore'), name)
if (fs.existsSync(configPath) !== true) throw new Error(`Couldn't find a tsconfig file at ${configPath}`)
this.tempDir = tempDir
const readFileAndMangle = (path) => { // We need to change the include or file in the original file to only compile the tests
const fileStr = fs.readFileSync(path, 'utf8')
const config = JSON5.parse(fileStr)
if (config.file) delete config.file
config.include = ['build/typings/**/*.ts', 'test/**/*.ts', 'src/**/*.spec.ts']
return JSON.stringify(config)
}
const configFile = ts.readJsonConfigFile(configPath, readFileAndMangle)
const parsedTsConfig = ts.parseJsonSourceFileConfigFileContent(configFile, ts.sys, path.dirname(configPath))
const createProgram = ts.createSemanticDiagnosticsBuilderProgram
const reportDiagnostic = (diagnostic) => {
const filePath = path.relative(rootDir, diagnostic.file.fileName)
const tranpiledJsPath = `${path.join(tempDir, filePath).slice(0, -3)}.js`
const errorLine = diagnostic.file.text.slice(0, diagnostic.start).split(/\r\n|\r|\n/).length
if (fs.existsSync(tranpiledJsPath)) {
fs.writeFileSync(tranpiledJsPath, '', 'utf8')
}
this.emit('error', `[Error ${diagnostic.code}]`, `${filePath}:${errorLine}`, ':', ts.flattenDiagnosticMessageText(diagnostic.messageText, formatHost.getNewLine()))
}
const reportWatchStatusChanged = (diagnostic, newLine, options, errorCount) => {
if (errorCount !== undefined) {
this.emit('ready')
} else {
this.emit('busy')
if (diagnostic.code === 6031) {
this.emit('message', 'transpiling your tests...')
} else if (diagnostic.code === 6032) {
this.emit('message', 'file changes detected. Transpiling your tests...')
}
}
}
// Note that there is another overload for `createWatchCompilerHost` that takes
// a set of root files.
this.host = ts.createWatchCompilerHost(
parsedTsConfig.fileNames,
{
...parsedTsConfig.options,
rootDir,
outDir: this.tempDir,
module: 'commonjs',
noEmit: false,
noResolve: true,
sourceMap: true
},
ts.sys,
createProgram,
reportDiagnostic,
reportWatchStatusChanged
)
}
async start () {
await super.start()
// `createWatchProgram` creates an initial program, watches files, and updates
// the program over time.
this.watcher = ts.createWatchProgram(this.host)
return await this.ready()
}
async close () {
await super.close()
this.watcher.close()
}
}