Add test for workers:validate command.

Signed-off-by: Toha <tohenk@yahoo.com>

tests/commands/workers/validate.test.ts

@@ -0,0 +1,62 @@
+import { execSync } from 'child_process'
+import fs from 'fs-extra'
+
+interface ExecError {
+  status: number
+  stdout: string
+}
+
+const ENV_VAR = 'cross-env ROOT_DIR=tests/__data__/output'
+
+beforeEach(() => {
+  fs.emptyDirSync('tests/__data__/output')
+})
+
+describe('workers:validate', () => {
+  it('will show a message if workers.txt does not exist', () => {
+    try {
+      const cmd = `${ENV_VAR} npm run workers:validate`
+      const stdout = execSync(cmd, { encoding: 'utf8' })
+      if (process.env.DEBUG === 'true') console.log(cmd, stdout)
+      process.exit(1)
+    } catch (error) {
+      expect((error as ExecError).status).toBe(1)
+      expect((error as ExecError).stdout).toContain('workers.txt file not found!')
+    }
+  })
+
+  it('will show a message if workers.txt contains validation error', () => {
+    try {
+      fs.writeFileSync('tests/__data__/output/workers.txt', 'worker1.example.com\nworker 2.example.com\r\nworker3.example.com')
+      const cmd = `${ENV_VAR} npm run workers:validate`
+      const stdout = execSync(cmd, { encoding: 'utf8' })
+      if (process.env.DEBUG === 'true') console.log(cmd, stdout)
+      process.exit(1)
+    } catch (error) {
+      expect((error as ExecError).status).toBe(1)
+      expect((error as ExecError).stdout).toContain(`
+┌─────────┬──────┬───────────────────┬────────────────────────┐
+│ (index) │ line │ type              │ content                │
+├─────────┼──────┼───────────────────┼────────────────────────┤
+│ 0       │ 1    │ 'missing_crlf'    │ 'worker1.example.com'  │
+│ 1       │ 2    │ 'contains_spaces' │ 'worker 2.example.com' │
+│ 2       │ 3    │ 'missing_crlf'    │ 'worker3.example.com'  │
+└─────────┴──────┴───────────────────┴────────────────────────┘
+
+3 problems (3 errors, 0 warnings) in 1 file(s)
+`)
+    }
+  })
+
+  it('does not display errors if there are none', () => {
+    try {
+      fs.writeFileSync('tests/__data__/output/workers.txt', 'worker1.example.com\r\nworker2.example.com\r\nworker3.example.com\r\n')
+      const cmd = `${ENV_VAR} npm run workers:validate`
+      const stdout = execSync(cmd, { encoding: 'utf8' })
+      if (process.env.DEBUG === 'true') console.log(cmd, stdout)
+    } catch (error) {
+      if (process.env.DEBUG === 'true') console.log((error as ExecError).stdout)
+      process.exit(1)
+    }
+  })
+})