[clangd] Drop dependence on standard library in check.test

Author: sam-mccall

clang-tools-extra/clangd/test/check.test

@@ -1,13 +1,18 @@
-# RUN: clangd -log=verbose -check 2>&1 | FileCheck -strict-whitespace %s
+// RUN: cp %s %t.cpp
+// RUN: clangd -log=verbose -check=%t.cpp 2>&1 | FileCheck -strict-whitespace %s
 
-CHECK: Testing on source file {{.*}}test.cc
-CHECK: internal (cc1) args are: -cc1
-CHECK: Building preamble...
-CHECK: Built preamble
-CHECK: Building AST...
-CHECK: Testing features at each token
-CHECK-DAG: hover: false
-CHECK-DAG: hover: true
-CHECK-DAG: tweak: AddUsing
-CHECK: All checks completed, 0 errors
+// CHECK: Testing on source file
+// CHECK: internal (cc1) args are: -cc1
+// CHECK: Building preamble...
+// CHECK: Built preamble
+// CHECK: Building AST...
+// CHECK: Testing features at each token
+// CHECK-DAG: tweak: ExpandAuto
+// CHECK-DAG: hover: true
+// CHECK-DAG: tweak: AddUsing
+// CHECK: All checks completed, 0 errors
 
+namespace ns {
+struct Foo {};
+} // namespace ns
+auto f = ns::Foo();