fix(instrumenter): support explicit resource management in TS (#4928)

Support explicit resource management (`using` declarations) in TS files. See https://www.typescriptlang.org/docs/handbook/release-notes/typescript-5-2.html Fixes #4876
stryker-mutator · Aug 1, 2024 · 2bd046a · 2bd046a
1 parent 4b8885c
commit 2bd046a
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Showing 5 changed files with 2,164 additions and 339 deletions.
diff --git a/package-lock.json b/package-lock.json
diff --git a/packages/instrumenter/package.json b/packages/instrumenter/package.json
@@ -45,6 +45,7 @@
     "@babel/generator": "~7.25.0",
     "@babel/parser": "~7.25.0",
     "@babel/plugin-proposal-decorators": "~7.24.7",
+    "@babel/plugin-proposal-explicit-resource-management": "^7.24.7",
     "@babel/preset-typescript": "~7.24.7",
     "@stryker-mutator/api": "8.3.0",
     "@stryker-mutator/util": "8.3.0",

diff --git a/packages/instrumenter/src/parsers/ts-parser.ts b/packages/instrumenter/src/parsers/ts-parser.ts
@@ -38,7 +38,10 @@ async function parse(text: string, fileName: string, isTSX: boolean): Promise<ba
     configFile: false,
     babelrc: false,
     presets: [[require.resolve('@babel/preset-typescript'), { isTSX, allExtensions: true }]],
-    plugins: [[require.resolve('@babel/plugin-proposal-decorators'), { legacy: true }]],
+    plugins: [
+      [require.resolve('@babel/plugin-proposal-decorators'), { legacy: true }],
+      [require.resolve('@babel/plugin-proposal-explicit-resource-management')],
+    ],
   });
   if (ast === null) {
     throw new Error(`Expected ${fileName} to contain a babel.types.file, but it yielded null`);