This interface defines virtual methods for each of the user-facing overload sets in InstancesClient. This allows users to inject custom behavior (e.g., with a Google Mock object) when writing tests that use objects of type InstancesClient.
[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14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 details the \u003ccode\u003eInstancesConnection\u003c/code\u003e object for \u003ccode\u003eInstancesClient\u003c/code\u003e, which is used for interacting with Google Cloud App Engine instances.\u003c/p\u003e\n"],["\u003cp\u003eThe latest release candidate version for this API is 2.37.0-rc, while version 2.19.0 is shown with multiple older versions listed as well.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eInstancesConnection\u003c/code\u003e defines virtual methods, such as \u003ccode\u003eListInstances\u003c/code\u003e, \u003ccode\u003eGetInstance\u003c/code\u003e, \u003ccode\u003eDeleteInstance\u003c/code\u003e, and \u003ccode\u003eDebugInstance\u003c/code\u003e, for user-facing operations.\u003c/p\u003e\n"],["\u003cp\u003eUsers can inject custom behaviors for testing using Google Mock objects with the interface the \u003ccode\u003eInstancesConnection\u003c/code\u003e object provides.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eMakeInstancesConnection()\u003c/code\u003e is used for creating concrete instances, while \u003ccode\u003eMockInstancesConnection\u003c/code\u003e is for creating mock objects.\u003c/p\u003e\n"]]],[],null,["# Class InstancesConnection (2.19.0)\n\nVersion 2.19.0keyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/appengine/latest/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.41.0](/cpp/docs/reference/appengine/2.41.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.40.0](/cpp/docs/reference/appengine/2.40.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.39.0](/cpp/docs/reference/appengine/2.39.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.38.0](/cpp/docs/reference/appengine/2.38.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.37.0](/cpp/docs/reference/appengine/2.37.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.36.0](/cpp/docs/reference/appengine/2.36.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.35.0](/cpp/docs/reference/appengine/2.35.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.34.0](/cpp/docs/reference/appengine/2.34.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.33.0](/cpp/docs/reference/appengine/2.33.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.32.0](/cpp/docs/reference/appengine/2.32.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.31.0](/cpp/docs/reference/appengine/2.31.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.30.0](/cpp/docs/reference/appengine/2.30.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.29.0](/cpp/docs/reference/appengine/2.29.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.28.0](/cpp/docs/reference/appengine/2.28.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.27.0](/cpp/docs/reference/appengine/2.27.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.26.0](/cpp/docs/reference/appengine/2.26.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.25.1](/cpp/docs/reference/appengine/2.25.1/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.24.0](/cpp/docs/reference/appengine/2.24.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.23.0](/cpp/docs/reference/appengine/2.23.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.22.1](/cpp/docs/reference/appengine/2.22.1/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.21.0](/cpp/docs/reference/appengine/2.21.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.20.0](/cpp/docs/reference/appengine/2.20.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.19.0](/cpp/docs/reference/appengine/2.19.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.18.0](/cpp/docs/reference/appengine/2.18.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.17.0](/cpp/docs/reference/appengine/2.17.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.16.0](/cpp/docs/reference/appengine/2.16.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.15.1](/cpp/docs/reference/appengine/2.15.1/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.14.0](/cpp/docs/reference/appengine/2.14.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.13.0](/cpp/docs/reference/appengine/2.13.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.12.0](/cpp/docs/reference/appengine/2.12.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection)\n- [2.11.0](/cpp/docs/reference/appengine/2.11.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection) \nThe [`InstancesConnection`](/cpp/docs/reference/appengine/2.19.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesConnection) object for [`InstancesClient`](/cpp/docs/reference/appengine/2.19.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesClient). \nThis interface defines virtual methods for each of the user-facing overload sets in [`InstancesClient`](/cpp/docs/reference/appengine/2.19.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesClient). This allows users to inject custom behavior (e.g., with a Google Mock object) when writing tests that use objects of type [`InstancesClient`](/cpp/docs/reference/appengine/2.19.0/classgoogle_1_1cloud_1_1appengine__v1_1_1InstancesClient).\n\nTo create a concrete instance, see [`MakeInstancesConnection()`](/cpp/docs/reference/appengine/2.19.0/namespacegoogle_1_1cloud_1_1appengine__v1).\n\nFor mocking, see [`appengine_v1_mocks::MockInstancesConnection`](/cpp/docs/reference/appengine/2.19.0/classgoogle_1_1cloud_1_1appengine__v1__mocks_1_1MockInstancesConnection).\n\nFunctions\n---------\n\n### virtual options()\n\n### virtual ListInstances(google::appengine::v1::ListInstancesRequest)\n\n### virtual GetInstance(google::appengine::v1::GetInstanceRequest const \\&)\n\n### virtual DeleteInstance(google::appengine::v1::DeleteInstanceRequest const \\&)\n\n### virtual DebugInstance(google::appengine::v1::DebugInstanceRequest const \\&)"]]
