[clangd] Fix windows buildbots for #import statements

Author: kadircet

clang-tools-extra/clangd/unittests/HeadersTests.cpp

@@ -210,6 +210,8 @@ TEST_F(HeadersTest, IncludeDirective) {
 #include_next "foo.h"
 )cpp";
 
+  // ms-compatibility changes meaning of #import, make sure it is turned off.
+  CDB.ExtraClangFlags.push_back("-fno-ms-compatibility");
   EXPECT_THAT(collectIncludes().MainFileIncludes,
               UnorderedElementsAre(Directive(tok::pp_include),
                                    Directive(tok::pp_import),

clang-tools-extra/clangd/unittests/PreambleTests.cpp

@@ -61,6 +61,8 @@ TEST(PreamblePatchTest, IncludeParsing) {
         ^#include <b.h>)cpp",
   };
 
+  // ms-compatibility changes meaning of #import, make sure it is turned off.
+  CDB.ExtraClangFlags.push_back("-fno-ms-compatibility");
   const auto FileName = testPath("foo.cc");
   for (const auto Case : Cases) {
     Annotations Test(Case);
@@ -96,6 +98,8 @@ TEST(PreamblePatchTest, ContainsNewIncludes) {
   MockFSProvider FS;
   MockCompilationDatabase CDB;
   IgnoreDiagnostics Diags;
+  // ms-compatibility changes meaning of #import, make sure it is turned off.
+  CDB.ExtraClangFlags.push_back("-fno-ms-compatibility");
 
   const auto FileName = testPath("foo.cc");
   ParseInputs PI;