1 files changed, 33 insertions, 0 deletions
diff --git a/test/Modules/no-implicit-builds.cpp b/test/Modules/no-implicit-builds.cpp
new file mode 100644
index 0000000..d9e8fa1
--- /dev/null
+++ b/test/Modules/no-implicit-builds.cpp
@@ -0,0 +1,33 @@
+// RUN: rm -rf %t
+
+// Produce an error if a module is needed, but not found.
+// RUN: %clang_cc1 -x c++ -std=c++11 -fmodules -fmodules-cache-path=%t \
+// RUN:     -fmodule-map-file=%S/Inputs/no-implicit-builds/b.modulemap \
+// RUN:     -fno-implicit-modules %s -verify
+
+// Compile the module and put it into the cache.
+// RUN: %clang_cc1 -x c++ -std=c++11 -fmodules -fmodules-cache-path=%t \
+// RUN:     -fmodule-map-file=%S/Inputs/no-implicit-builds/b.modulemap \
+// RUN:     %s -Rmodule-build 2>&1 | FileCheck --check-prefix=CHECK-CACHE-BUILD %s
+// CHECK-CACHE-BUILD: {{building module 'b'}}
+
+// Produce an error if a module is found in the cache but implicit modules is off.
+// Note that the command line must match the command line for the first check, otherwise
+// this check might not find the module in the cache and trivially succeed.
+// RUN: %clang_cc1 -x c++ -std=c++11 -fmodules -fmodules-cache-path=%t \
+// RUN:     -fmodule-map-file=%S/Inputs/no-implicit-builds/b.modulemap \
+// RUN:     %s -Rmodule-build -fno-implicit-modules -verify
+
+// Verify that we can still pass the module via -fmodule-file when implicit modules
+// are switched off:
+// - First, explicitly compile the module:
+// RUN: %clang_cc1 -x c++ -std=c++11 -fmodules -fmodule-name=b -o %t/b.pcm \
+// RUN:     -emit-module %S/Inputs/no-implicit-builds/b.modulemap \
+// RUN:     -fno-implicit-modules
+//
+// - Next, verify that we can load it:
+// RUN: %clang_cc1 -x c++ -std=c++11 -fmodules -fmodule-file=%t/b.pcm \
+// RUN:     -fmodule-map-file=%S/Inputs/no-implicit-builds/b.modulemap \
+// RUN:     -fno-implicit-modules %s
+
+#include "Inputs/no-implicit-builds/b.h"  // expected-error {{is needed but has not been provided}}