Application developers may want to test their code with simulated responses, including errors, from an object of type InstancesClient. To do so, construct an object of type InstancesClient with an instance of this class. Then use the Google Test framework functions to program the behavior of this mock.
See Also
This example for how to test your application with GoogleTest. While the example showcases types from the BigQuery library, the underlying principles apply for any pair of *Client and *Connection.
Functions
virtual options()
This function is implemented using gMock's MOCK_METHOD().
Consult the gMock documentation to use this mock in your tests.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["\u003cp\u003eThis webpage provides documentation for the \u003ccode\u003eMockInstancesConnection\u003c/code\u003e class, which is used for mocking \u003ccode\u003eInstancesConnection\u003c/code\u003e in the Google Cloud App Engine C++ library, with the most recent version of the documentation being \u003ccode\u003e2.37.0-rc\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eMockInstancesConnection\u003c/code\u003e class allows developers to simulate responses and test code that interacts with \u003ccode\u003eInstancesClient\u003c/code\u003e, enabling comprehensive testing, even for error handling.\u003c/p\u003e\n"],["\u003cp\u003eThe class is based on the gMock framework, and utilizes the \u003ccode\u003eMOCK_METHOD()\u003c/code\u003e function, requiring users to refer to the gMock documentation to get the most out of this mock in their testing.\u003c/p\u003e\n"],["\u003cp\u003eThe documentation includes a comprehensive list of supported versions of the \u003ccode\u003eMockInstancesConnection\u003c/code\u003e class, spanning from version \u003ccode\u003e2.11.0\u003c/code\u003e up to the latest \u003ccode\u003e2.37.0-rc\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eKey functions within \u003ccode\u003eMockInstancesConnection\u003c/code\u003e are documented, such as \u003ccode\u003eoptions()\u003c/code\u003e, \u003ccode\u003eListInstances()\u003c/code\u003e, \u003ccode\u003eGetInstance()\u003c/code\u003e, \u003ccode\u003eDeleteInstance()\u003c/code\u003e, and \u003ccode\u003eDebugInstance()\u003c/code\u003e, which are critical for mocking various App Engine instance management operations.\u003c/p\u003e\n"]]],[],null,["# Class MockInstancesConnection (2.27.0)\n\nVersion 2.27.0keyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/appengine/latest/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.41.0](/cpp/docs/reference/appengine/2.41.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.40.0](/cpp/docs/reference/appengine/2.40.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.39.0](/cpp/docs/reference/appengine/2.39.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.38.0](/cpp/docs/reference/appengine/2.38.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.37.0](/cpp/docs/reference/appengine/2.37.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.36.0](/cpp/docs/reference/appengine/2.36.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.35.0](/cpp/docs/reference/appengine/2.35.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.34.0](/cpp/docs/reference/appengine/2.34.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.33.0](/cpp/docs/reference/appengine/2.33.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.32.0](/cpp/docs/reference/appengine/2.32.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.31.0](/cpp/docs/reference/appengine/2.31.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.30.0](/cpp/docs/reference/appengine/2.30.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.29.0](/cpp/docs/reference/appengine/2.29.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.28.0](/cpp/docs/reference/appengine/2.28.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.27.0](/cpp/docs/reference/appengine/2.27.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.26.0](/cpp/docs/reference/appengine/2.26.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.25.1](/cpp/docs/reference/appengine/2.25.1/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.24.0](/cpp/docs/reference/appengine/2.24.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.23.0](/cpp/docs/reference/appengine/2.23.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.22.1](/cpp/docs/reference/appengine/2.22.1/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.21.0](/cpp/docs/reference/appengine/2.21.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.20.0](/cpp/docs/reference/appengine/2.20.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.19.0](/cpp/docs/reference/appengine/2.19.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.18.0](/cpp/docs/reference/appengine/2.18.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.17.0](/cpp/docs/reference/appengine/2.17.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.16.0](/cpp/docs/reference/appengine/2.16.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.15.1](/cpp/docs/reference/appengine/2.15.1/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.14.0](/cpp/docs/reference/appengine/2.14.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.13.0](/cpp/docs/reference/appengine/2.13.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.12.0](/cpp/docs/reference/appengine/2.12.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection)\n- [2.11.0](/cpp/docs/reference/appengine/2.11.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection) \nA class to mock `InstancesConnection`. \nApplication developers may want to test their code with simulated responses, including errors, from an object of type `InstancesClient`. To do so, construct an object of type `InstancesClient` with an instance of this class. Then use the Google Test framework functions to program the behavior of this mock.\n\n###### See Also\n\n[This example](https://cloud.google.com/cpp/docs/reference/bigquery/2.27.0/bigquery-read-mock) for how to test your application with GoogleTest. While the example showcases types from the BigQuery library, the underlying principles apply for any pair of `*Client` and `*Connection`.\n\nFunctions\n---------\n\n### virtual options()\n\nThis function is implemented using [gMock](https://google.github.io/googletest)'s `MOCK_METHOD()`.\nConsult the gMock documentation to use this mock in your tests.\n\n### virtual ListInstances(google::appengine::v1::ListInstancesRequest)\n\nThis function is implemented using [gMock](https://google.github.io/googletest)'s `MOCK_METHOD()`.\nConsult the gMock documentation to use this mock in your tests.\n\n### virtual GetInstance(google::appengine::v1::GetInstanceRequest const \\&)\n\nThis function is implemented using [gMock](https://google.github.io/googletest)'s `MOCK_METHOD()`.\nConsult the gMock documentation to use this mock in your tests.\n\n### virtual DeleteInstance(google::longrunning::Operation const \\&)\n\nThis function is implemented using [gMock](https://google.github.io/googletest)'s `MOCK_METHOD()`.\nConsult the gMock documentation to use this mock in your tests.\n\n### virtual DebugInstance(google::longrunning::Operation const \\&)\n\nThis function is implemented using [gMock](https://google.github.io/googletest)'s `MOCK_METHOD()`.\nConsult the gMock documentation to use this mock in your tests."]]
