Update tests

tests/commands/channels/lint.test.ts

@@ -0,0 +1,28 @@
+import { execSync } from 'child_process'
+
+type ExecError = {
+  status: number
+  stdout: string
+}
+
+describe('channels:lint', () => {
+  it('will show a message if the file contains a syntax error', () => {
+    try {
+      const stdout = execSync(
+        'npm run channels:lint -- tests/__data__/input/channels-lint/channels-lint.channels.xml',
+        {
+          encoding: 'utf8'
+        }
+      )
+      console.log(stdout)
+      process.exit(1)
+    } catch (error) {
+      expect((error as ExecError).status).toBe(1)
+      expect(
+        (error as ExecError).stdout.includes(
+          "tests/__data__/input/channels-lint/channels-lint.channels.xml\n\n\ntests/__data__/input/channels-lint/channels-lint.channels.xml\n 3:0  Element 'channel': The attribute 'lang' is required but missing.\n\n1 error(s)\n"
+        )
+      ).toBe(true)
+    }
+  })
+})