fix(ts): support es private fields (#2605)

Support [es private fields](https://www.typescriptlang.org/docs/handbook/classes.html#ecmascript-private-fields) in typescript code.

e2e/package.json

@@ -29,7 +29,7 @@
     "link-parent-bin": "^2.0.0",
     "load-grunt-tasks": "~5.1.0",
     "mocha": "~8.2.0",
-    "mutation-testing-metrics": "~1.4.0",
+    "mutation-testing-metrics": "~1.4.3",
     "rxjs": "~6.5.3",
     "semver": "~6.3.0",
     "ts-jest": "~26.3.0",

e2e/test/karma-webpack-with-ts/package.json

@@ -8,8 +8,8 @@
   },
   "dependencies": {
     "lit-element": "~2.3.1",
-    "mutation-testing-metrics": "~1.4.0",
-    "mutation-testing-report-schema": "~1.4.0"
+    "mutation-testing-metrics": "~1.4.3",
+    "mutation-testing-report-schema": "~1.4.3"
   },
   "devDependencies": {
     "@types/webpack-env": "~1.15.2"

packages/api/package.json

@@ -38,7 +38,7 @@
     "node": ">=10"
   },
   "dependencies": {
-    "mutation-testing-report-schema": "~1.4.0",
+    "mutation-testing-report-schema": "~1.4.3",
     "surrial": "~2.0.2",
     "tslib": "~2.0.0"
   },

packages/core/package.json

@@ -71,8 +71,8 @@
     "log4js": "~6.2.1",
     "minimatch": "~3.0.4",
     "mkdirp": "~1.0.3",
-    "mutation-testing-elements": "~1.4.1",
-    "mutation-testing-metrics": "~1.4.0",
+    "mutation-testing-elements": "~1.4.3",
+    "mutation-testing-metrics": "~1.4.3",
     "npm-run-path": "~4.0.1",
     "progress": "~2.0.0",
     "rimraf": "~3.0.0",

packages/instrumenter/package.json

@@ -33,7 +33,9 @@
     "@babel/core": "~7.12.3",
     "@babel/generator": "~7.12.1",
     "@babel/parser": "~7.12.3",
+    "@babel/plugin-proposal-class-properties": "^7.12.1",
     "@babel/plugin-proposal-decorators": "~7.12.1 ",
+    "@babel/plugin-proposal-private-methods": "^7.12.1",
     "@babel/preset-typescript": "~7.12.1 ",
     "@stryker-mutator/api": "4.1.0",
     "@stryker-mutator/util": "4.1.0",

packages/instrumenter/src/parsers/ts-parser.ts

@@ -18,7 +18,11 @@ export async function parse(text: string, fileName: string): Promise<TSAst> {
     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-class-properties'),
+      require.resolve('@babel/plugin-proposal-private-methods'),
+      [require.resolve('@babel/plugin-proposal-decorators'), { legacy: true }],
+    ],
   });
   if (types.isProgram(ast)) {
     throw new Error(`Expected ${fileName} to contain a babel.types.file, but was a program`);