Tune eslint packages test configuration (#10848)

* Do not load root babel.config.js in esilnt tests

* add testcase: sourceType: script + globalReturn: true

* chore: remove globalReturn on default test config

eslint/babel-eslint-parser/test/integration.js

@@ -16,6 +16,8 @@ const baseEslintOpts = {
   parser: "current-babel-eslint",
   parserOptions: {
     sourceType: "script",
+    requireConfigFile: false,
+    babelOptions: { configFile: false }
   },
 };
 

eslint/babel-eslint-parser/test/non-regression.js

@@ -18,26 +18,20 @@ function verifyAndAssertMessagesWithSpecificESLint(
       node: true,
       es6: true,
     },
+    ...overrideConfig,
     parserOptions: {
       sourceType,
-      ecmaFeatures: {
-        globalReturn: true,
-      },
+      requireConfigFile: false,
       babelOptions: {
         configFile: path.resolve(
           __dirname,
           "./fixtures/config/babel.config.js",
         ),
       },
+      ...overrideConfig?.parserOptions,
     },
   };
 
-  if (overrideConfig) {
-    for (const key in overrideConfig) {
-      config[key] = overrideConfig[key];
-    }
-  }
-
   const messages = linter.verify(code, config);
 
   if (messages.length !== expectedMessages.length) {
@@ -1566,7 +1560,7 @@ describe("verify", () => {
     );
   });
 
-  it("no-implicit-globals in script", () => {
+  it("no-implicit-globals in script: globalReturn is false", () => {
     verifyAndAssertMessages(
       "var leakedGlobal = 1;",
       { "no-implicit-globals": 1 },
@@ -1576,7 +1570,28 @@ describe("verify", () => {
       "script",
       {
         env: {},
-        parserOptions: { ecmaVersion: 6, sourceType: "script" },
+        parserOptions: {
+          ecmaVersion: 6,
+          sourceType: "script",
+          ecmaFeatures: { globalReturn: false },
+        },
+      },
+    );
+  });
+
+  it("no-implicit-globals in script: globalReturn is true", () => {
+    verifyAndAssertMessages(
+      "var leakedGlobal = 1;",
+      { "no-implicit-globals": 1 },
+      [],
+      "script",
+      {
+        env: {},
+        parserOptions: {
+          ecmaVersion: 6,
+          sourceType: "script",
+          ecmaFeatures: { globalReturn: true },
+        },
       },
     );
   });