[serialized diagnostics]: add test cases for serialized diagnostics, including a test case for no issues, multiple issues, and
a single issue. Along the way, tweak c-index-test -read-diagnostics output so it is easier to tell what diagnostics are
child diagnostics.
llvm-svn: 144349
diff --git a/clang/test/Misc/serialized-diags-no-issue.c b/clang/test/Misc/serialized-diags-no-issue.c
new file mode 100644
index 0000000..5c7da82
--- /dev/null
+++ b/clang/test/Misc/serialized-diags-no-issue.c
@@ -0,0 +1,10 @@
+void foo();
+
+// RUN: %clang -Wall -fsyntax-only %s --serialize-diagnostics %t
+// RUN: c-index-test -read-diagnostics %t 2>&1 | FileCheck %s
+// RUN: rm -f %t
+
+// NOTE: it is important that this test case contains no issues. It tests
+// that serialize diagnostics work in the absence of any issues.
+
+// CHECK: Number of diagnostics: 0