fix: reuse test task

Author: chen ruixiang

package.json

@@ -71,9 +71,8 @@
     "lint": "eslint --max-warnings 0 --ext js . && eslint --max-warnings 0 --ext ts .",
     "build": "node scripts/build",
     "watch": "node scripts/build --watch",
-    "coverage": "ASC_FEATURES=\"*\" c8 npm run test:coverage",
+    "coverage": "ASC_FEATURES=\"*\" ASC_COVERAGERUN=1 c8 npm run test",
     "test": "npm run test:parser && npm run test:compiler -- --parallel && npm run test:browser && npm run test:asconfig && npm run test:transform",
-    "test:coverage": "npm run test:parser && npm run test:compiler && npm run test:browser && npm run test:asconfig && npm run test:transform",
     "test:parser": "node --enable-source-maps tests/parser",
     "test:compiler": "node --enable-source-maps --experimental-wasi-unstable-preview1 --no-warnings tests/compiler",
     "test:browser": "node --enable-source-maps tests/browser",

tests/compiler.js

@@ -79,6 +79,8 @@ if (args.help) {
 }
 
 const features = process.env.ASC_FEATURES ? process.env.ASC_FEATURES.split(",") : [];
+//Disable parallel run during test coverage report generation
+const coverageRun = process.env.ASC_FEATURES ? true : false;
 const featuresConfig = require("./features.json");
 const basedir = path.join(dirname, "compiler");
 
@@ -501,7 +503,7 @@ function evaluateResult(failedTests, skippedTests) {
 }
 
 // Run tests in parallel if requested
-if (args.parallel && coreCount > 2) {
+if (args.parallel && coreCount > 2 && !coverageRun) {
   if (cluster.isWorker) {
     process.on("message", msg => {
       if (msg.cmd != "run") throw Error("invalid command: " + JSON.stringify(msg));