TermiNexus
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74 lines
3.1 KiB
JavaScript
74 lines
3.1 KiB
JavaScript
/*
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* jest.config.js
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*
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* Configuration for jest tests.
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*/
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// When PYLANCE_JEST_TRANSPILE_ONLY=1 (set by pyrx CI), switch ts-jest into transpile-only
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// mode via `isolatedModules: true` (uses `tsc.transpileModule`, no type checking — much
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// faster). Tests are still type-checked by the dedicated `Typecheck` CI job. When unset
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// (default / local dev), ts-jest runs with full type-checking so type errors still surface.
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//
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// We intentionally stay on ts-jest in both modes so the emitted JS is byte-identical to the
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// local-dev configuration. Alternative transformers like @swc/jest can break edge cases the
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// rest of the test suite relies on (e.g. `jest.spyOn` on namespace exports — SWC emits
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// non-configurable getters — or `override readonly field!:` subclass fields, which SWC
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// re-defines after `super()` returns and so wipes the parent's assignment).
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const useTranspileOnly = process.env.PYLANCE_JEST_TRANSPILE_ONLY === '1';
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// In transpile-only mode we pass an inline compilerOptions object so we can force
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// `module: 'commonjs'`. The parent tsconfig chain sets `module: 'node16'`, which would
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// otherwise leave dynamic `import()` calls untransformed — those then require
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// `--experimental-vm-modules` under Jest. The set of options below mirrors the bits of
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// `tsconfig.jest.json` that matter for `tsc.transpileModule`.
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const transpileOnlyTsconfig = {
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target: 'es2019',
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module: 'commonjs',
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moduleResolution: 'node',
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esModuleInterop: true,
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allowSyntheticDefaultImports: true,
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experimentalDecorators: true,
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resolveJsonModule: true,
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isolatedModules: true,
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preserveConstEnums: false,
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baseUrl: '.',
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paths: {
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'vscode-languageserver': ['./node_modules/vscode-languageserver/lib/common/api'],
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'vscode-languageserver/node': ['./node_modules/vscode-languageserver/lib/node/main'],
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'vscode-languageserver-protocol': ['./node_modules/vscode-languageserver-protocol/lib/common/api'],
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'vscode-languageserver-textdocument': ['./node_modules/vscode-languageserver-textdocument/lib/umd/main'],
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'vscode-languageserver-types': ['./node_modules/vscode-languageserver-types/lib/umd/main'],
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'vscode-jsonrpc': ['./node_modules/vscode-jsonrpc/lib/common/api'],
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'vscode-jsonrpc/node': ['./node_modules/vscode-jsonrpc/lib/node/main'],
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},
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};
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const transform = {
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'^.+\\.tsx?$': [
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'ts-jest',
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useTranspileOnly
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? {
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tsconfig: transpileOnlyTsconfig,
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isolatedModules: true,
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diagnostics: false,
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}
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: {
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tsconfig: 'tsconfig.jest.json',
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diagnostics: {
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ignoreCodes: [151002],
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},
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},
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],
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};
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module.exports = {
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testEnvironment: 'node',
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roots: ['<rootDir>/src/tests'],
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transform,
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// Place jest's transform cache inside node_modules so the existing node_modules CI cache
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// preserves it across runs.
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cacheDirectory: '<rootDir>/node_modules/.cache/jest',
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testRegex: '(/__tests__/.*|(\\.|/)(test|spec))\\.tsx?$',
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moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx'],
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};
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