Allow cmake option to remove tests that depend on DNS lookup

Author: sbiscigl

.cspell.json

@@ -57,7 +57,7 @@
     "MMSYSERR",
     "WAVEFORMATEX",
     "Unprepare",
-    "DDISABLE_IMDSV1",
+    "DDISABLE",
     "SENDREQUEST",
     "threadpool",
     "stdlib",

CMakeLists.txt

@@ -67,6 +67,7 @@ if (LEGACY_BUILD)
     option(USE_TLS_V1_2 "Set http client to enforce TLS 1.2" ON)
     option(USE_TLS_V1_3 "Set http client to enforce TLS 1.3" OFF)
     option(ENABLE_SMOKE_TESTS "Enable smoke tests" OFF)
+    option(DISABLE_DNS_REQUIRED_TESTS "Disable unit tests that require DNS lookup to succeed, useful when using a http client that does not perform DNS lookup" OFF)
 
 
     set(AWS_USER_AGENT_CUSTOMIZATION "" CACHE STRING "User agent extension")
@@ -89,6 +90,10 @@ if (LEGACY_BUILD)
         add_definitions(-DENFORCE_TLS_V1_3)
     endif ()
 
+    if (DISABLE_DNS_REQUIRED_TESTS)
+        add_definitions(-DDISABLE_DNS_REQUIRED_TESTS)
+    endif ()
+
     #From https://stackoverflow.com/questions/18968979/how-to-get-colorized-output-with-cmake
     if (NOT WIN32)
         string(ASCII 27 Esc)

tests/aws-cpp-sdk-core-tests/http/HttpClientTest.cpp

@@ -2,7 +2,7 @@
  * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
  * SPDX-License-Identifier: Apache-2.0.
  */
-
+#ifndef DISABLE_DNS_REQUIRED_TESTS
 #include <aws/testing/AwsCppSdkGTestSuite.h>
 #include <aws/core/http/HttpRequest.h>
 #include <aws/core/http/HttpResponse.h>
@@ -385,3 +385,4 @@ TEST_F(CURLHttpClientTest, TestHttpRequestWorksFine)
 #endif // ENABLE_CURL_CLIENT
 #endif // ENABLE_HTTP_CLIENT_TESTING
 #endif // NO_HTTP_CLIENT
+#endif  // DISABLE_DNS_REQUIRED_TESTS