fix: cov replaced warning at win

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,24 @@
+<!--
+Thank you for your pull request. Please review below requirements.
+Bug fixes and new features should include tests and possibly benchmarks.
+Contributors guide: https://github.com/eggjs/egg/blob/master/CONTRIBUTING.md
+
+感谢您贡献代码。请确认下列 checklist 的完成情况。
+Bug 修复和新功能必须包含测试，必要时请附上性能测试。
+Contributors guide: https://github.com/eggjs/egg/blob/master/CONTRIBUTING.md
+-->
+
+##### Checklist
+<!-- Remove items that do not apply. For completed items, change [ ] to [x]. -->
+
+- [ ] `npm test` passes
+- [ ] tests and/or benchmarks are included
+- [ ] documentation is changed or added
+- [ ] commit message follows commit guidelines
+
+##### Affected core subsystem(s)
+<!-- Provide affected core subsystem(s). -->
+
+
+##### Description of change
+<!-- Provide a description of the change below this comment. -->

index.js

@@ -10,12 +10,6 @@ class EggBin extends Command {
 
     // load directory
     this.load(path.join(__dirname, 'lib/cmd'));
-
-    /* istanbul ignore if */
-    if (process.platform === 'win32') {
-      console.warn('`cov` is replaced with `test` at windows');
-      this.alias('cov', 'test');
-    }
   }
 }
 

lib/cmd/cov.js

@@ -35,6 +35,12 @@ class CovCommand extends Command {
   }
 
   * run(context) {
+    /* istanbul ignore if */
+    if (process.platform === 'win32') {
+      console.warn('`cov` is replaced with `test` at windows');
+      return yield super.run(context);
+    }
+
     const { cwd, argv, execArgv } = context;
     const tmpDir = path.join(cwd, '.tmp');
     yield mkdirp(tmpDir);