add basic function test

update travis to run function test

test/function_test/cdn/CMakeLists.txt

@@ -0,0 +1,25 @@
+cmake_minimum_required(VERSION 3.0)
+project(demo)
+set(CMAKE_CXX_STANDARD 11)
+if(CMAKE_HOST_WIN32)
+    include_directories("C:\\Program Files (x86)\\alibabacloud-sdk\\include")
+    link_directories("C:\\Program Files (x86)\\alibabacloud-sdk\\lib")
+endif()
+
+# note ft_build is the dir you build sdk
+
+include_directories("../../../core/include/")
+include_directories("../../../cdn/include/")
+link_directories(${CMAKE_SOURCE_DIR}/ft_build/lib)
+
+add_executable(cdn_ft cdn_describeCdnService_ft.cc)
+target_link_libraries(cdn_ft alibabacloud-sdk-core alibabacloud-sdk-cdn)
+
+target_link_libraries(cdn_ft core gtest gmock_main)
+
+set_target_properties(cdn_ft
+  PROPERTIES
+  OUTPUT_NAME ${TARGET_OUTPUT_NAME_PREFIX}cdn_ft
+  RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
+
+add_test(NAME cdn_ft COMMAND cdn_ft)

test/function_test/cdn/cdn_describeCdnService_ft.cc

@@ -0,0 +1,31 @@
+#include <iostream>
+#include "../utils.h"
+#include "gtest/gtest.h"
+#include "alibabacloud/core/AlibabaCloud.h"
+#include "alibabacloud/cdn/CdnClient.h"
+
+using namespace std;
+using namespace AlibabaCloud;
+using namespace AlibabaCloud::Cdn;
+
+namespace {
+  TEST(cdn, describeCdnService) {
+    utUtils utils;
+    string key = utils.get_env("ENV_AccessKeyId");
+    string secret = utils.get_env("ENV_AccessKeySecret");
+    string uid = utils.get_env("ENV_TEST_UID");
+    InitializeSdk();
+    ClientConfiguration configuration("cn-hangzhou");
+    CdnClient client(key, secret, configuration);
+    Model::DescribeCdnServiceRequest request;
+    auto outcome = client.describeCdnService(request);
+    EXPECT_TRUE(outcome.isSuccess());
+    EXPECT_TRUE(outcome.error().errorCode().empty());
+    EXPECT_TRUE(outcome.result().getChangingChargeType() == "PayByTraffic");
+    EXPECT_TRUE(outcome.result().getInternetChargeType() == "PayByTraffic");
+    EXPECT_TRUE(outcome.result().getInstanceId() == uid);
+    EXPECT_TRUE(outcome.result().getOpeningTime() == "2019-01-02T09:16:34Z");
+    EXPECT_TRUE(outcome.result().getChangingAffectTime() == "2019-01-02T09:16:33Z");
+    ShutdownSdk();
+  }
+}