cli: forward test coverage flag

packages/cli/src/commands/plugin/test.ts

@@ -8,6 +8,9 @@ export default async (cmd: Command) => {
   if (cmd.watch) {
     args.push('--watch');
   }
+  if (cmd.coverage) {
+    args.push('--coverage');
+  }
 
   try {
     const result = spawnSync('web-scripts', args, { stdio: 'inherit' });

packages/cli/src/index.ts

@@ -41,6 +41,7 @@ const main = (argv: string[]) => {
   program
     .command('plugin:test')
     .option('--watch', 'Enable watch mode')
+    .option('--coverage', 'Report test coverage')
     .description('Run all tests for a plugin')
     .action(pluginTest);