[clang-tools-extra] [clangd] [Modules] Support Reusable Modules Builder (PR #106683)

[kadir çetinkaya via cfe-commits]

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@@ -482,6 +482,42 @@ void func() {
   EXPECT_EQ(Result.signatures[0].parameters[0].labelString, "int a");
 }
 
+TEST_F(PrerequisiteModulesTests, ReusablePrerequisiteModulesTest) {
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kadircet wrote:

can you also add some tests demonstrating behavior in presence of stale cache entries?

https://github.com/llvm/llvm-project/pull/106683