add test

clang-tools-extra/clang-tidy/performance/ExplicitMoveConstructorCheck.cpp

@@ -58,7 +58,7 @@ void ExplicitMoveConstructorCheck::check(
 
   auto Diag = diag(
       MoveCtor->getLocation(),
-      "copy constructor may be called instead of explicit move constructor");
+      "copy constructor may be called instead of move constructor");
   SourceRange ExplicitTokenRange =
       findExplicitToken(MoveCtor, *Result.SourceManager, getLangOpts());
 

clang-tools-extra/test/clang-tidy/checkers/performance/explicit-move-constructor.cpp

@@ -0,0 +1,34 @@
+// RUN: %check_clang_tidy %s performance-explicit-move-constructor %t
+
+class NotReported1 {};
+
+class NotReported2 {
+public:
+  NotReported2(NotReported2&&) = default;
+  NotReported2(const NotReported2&) = default;
+};
+
+class NotReported3 {
+public:
+  explicit NotReported3(NotReported3&&) = default;
+};
+
+class NotReported4 {
+public:
+  explicit NotReported4(NotReported4&&) = default;
+  NotReported4(const NotReported4&) = delete;
+};
+
+class NotReported5 {
+public:
+  explicit NotReported5(NotReported5&&) = delete;
+  NotReported5(const NotReported5&) = default;
+};
+
+class Reported {
+public:
+  explicit Reported(Reported&&) = default;
+  // CHECK-MESSAGES: :[[@LINE-1]]:12: warning: copy constructor may be called instead of move constructor [performance-explicit-move-constructor]
+  // CHECK-FIXES: {{^}}Reported(Reported&&) = default;{{$}}
+  Reported(const Reported&) = default;
+};