test(cli): add tests for core/shell_runner module (#612)

Signed-off-by: Quan Nguyen <quan@swirldslabs.com>

fullstack-network-manager/test/unit/core/shell_runner.test.mjs

@@ -0,0 +1,27 @@
+import { describe, expect, it, jest } from '@jest/globals'
+import { ShellRunner } from '../../../src/core/shell_runner.mjs'
+import { NewLogger, Logger } from '../../../src/core/logging.mjs'
+import { ChildProcess } from 'child_process'
+import { Readable } from 'stream'
+
+describe('ShellRunner', () => {
+  const logger = NewLogger('debug')
+  const shellRunner = new ShellRunner(logger)
+  const loggerSpy = jest.spyOn(Logger.prototype, 'debug').mockImplementation()
+  const childProcessSpy = jest.spyOn(ChildProcess.prototype, 'on')
+  const readableSpy = jest.spyOn(Readable.prototype, 'on')
+
+  it('should run command', async () => {
+    await shellRunner.run('ls -l')
+    expect(loggerSpy).toHaveBeenNthCalledWith(1, 'Executing command: \'ls -l\'')
+    expect(loggerSpy).toHaveBeenNthCalledWith(2,'Finished executing: \'ls -l\'', {
+      'commandExitCode': expect.any(Number),
+      'commandExitSignal': null,
+      'commandOutput': expect.any(Array)
+    })
+    expect(readableSpy).toHaveBeenCalledWith('data', expect.anything())
+    expect(childProcessSpy).toHaveBeenCalledWith('exit', expect.anything())
+  })
+
+  jest.clearAllMocks()
+})