Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/clang-tools-extra/unittests/clangd/ContextTests.cpp

@@ -0,0 +1,57 @@
+//===-- ContextTests.cpp - Context tests ------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Context.h"
+
+#include "gtest/gtest.h"
+
+namespace clang {
+namespace clangd {
+
+TEST(ContextTests, Simple) {
+  Key<int> IntParam;
+  Key<int> ExtraIntParam;
+
+  Context Ctx = Context::empty().derive(IntParam, 10).derive(ExtraIntParam, 20);
+
+  EXPECT_EQ(*Ctx.get(IntParam), 10);
+  EXPECT_EQ(*Ctx.get(ExtraIntParam), 20);
+}
+
+TEST(ContextTests, MoveOps) {
+  Key<std::unique_ptr<int>> Param;
+
+  Context Ctx = Context::empty().derive(Param, llvm::make_unique<int>(10));
+  EXPECT_EQ(**Ctx.get(Param), 10);
+
+  Context NewCtx = std::move(Ctx);
+  EXPECT_EQ(**NewCtx.get(Param), 10);
+}
+
+TEST(ContextTests, Builders) {
+  Key<int> ParentParam;
+  Key<int> ParentAndChildParam;
+  Key<int> ChildParam;
+
+  Context ParentCtx =
+      Context::empty().derive(ParentParam, 10).derive(ParentAndChildParam, 20);
+  Context ChildCtx =
+      ParentCtx.derive(ParentAndChildParam, 30).derive(ChildParam, 40);
+
+  EXPECT_EQ(*ParentCtx.get(ParentParam), 10);
+  EXPECT_EQ(*ParentCtx.get(ParentAndChildParam), 20);
+  EXPECT_EQ(ParentCtx.get(ChildParam), nullptr);
+
+  EXPECT_EQ(*ChildCtx.get(ParentParam), 10);
+  EXPECT_EQ(*ChildCtx.get(ParentAndChildParam), 30);
+  EXPECT_EQ(*ChildCtx.get(ChildParam), 40);
+}
+
+} // namespace clangd
+} // namespace clang