aws-sdk-mock是否支持Mock AWS SSM？Mock代码未生效求助

Absolutely, aws-sdk-mock does support mocking AWS SSM operations like getParametersByPath—the issue you're facing is almost certainly a setup mistake rather than a lack of support for the service. Let's break down the most common reasons your mock isn't working, and fix it step by step.

Common Fixes for Unresponsive SSM Mocks #

1. Ensure Mock Setup Happens Before Importing the AWS SDK Client #

This is the #1 culprit for mocks failing to take effect. If you import the SSM client first, the real AWS SDK instance gets cached, and your mock won't override it. Always initialize the mock before requiring/importing the SSM client.

Correct Order Example:

// Step 1: Initialize aws-sdk-mock and set up your mock
const AWSMock = require('aws-sdk-mock');
const mockResponse = {
  Parameters: [
    { Name: '/test/path/foo', Value: 'mock-foo-value' },
    { Name: '/test/path/bar', Value: 'mock-bar-value' }
  ]
};

AWSMock.mock('SSM', 'getParametersByPath', (params, callback) => {
  // Optional: Validate incoming params to ensure they match your code's calls
  console.log('Mock received params:', params);
  callback(null, mockResponse);
});

// Step 2: Now import the SSM client
const SSM = require('aws-sdk/clients/ssm');

// Step 3: Use the client as you normally would
const ssmClient = new SSM({ region: 'us-east-1' });
ssmClient.getParametersByPath(
  { Path: '/test/path/', Recursive: true },
  (err, data) => {
    if (err) console.error('Error:', err);
    else console.log('Mocked Data:', data); // This will log your mockResponse
  }
);

2. Verify Parameter Matching (If Using Strict Mocks) #

By default, aws-sdk-mock uses strict parameter matching. If the params passed to your real getParametersByPath call don't exactly match what the mock expects, it might fall back to the real AWS service.

If you don't need strict parameter checks, you can modify your mock to ignore params entirely, or add flexible handling:

AWSMock.mock('SSM', 'getParametersByPath', (params, callback) => {
  // Ignore params and return mock data regardless of input
  callback(null, mockResponse);
});

3. Update aws-sdk-mock to the Latest Version #

Older versions of the library might have incomplete support for newer SSM operations. Run this command to upgrade:

npm install aws-sdk-mock@latest --save-dev

4. Clean Up Mocks After Tests (For Test Suites) #

If you're using this in a test framework like Jest or Mocha, make sure to restore the mock after each test to avoid cross-test contamination:

afterEach(() => {
  AWSMock.restore('SSM');
});

Final Confirmation #

Yes, aws-sdk-mock fully supports SSM, including getParametersByPath. The key is to nail the setup order—mock first, then import the client. Once you fix that, your mock should override the real service call as expected.

内容的提问来源于stack exchange，提问作者Mandar