Increase test coverage.

Author: vgvassilev

unittests/CppInterOp/FunctionReflectionTest.cpp

@@ -1441,6 +1441,10 @@ TEST(FunctionReflectionTest, JitCallAdvanced) {
 #endif
   if (llvm::sys::RunningOnValgrind())
     GTEST_SKIP() << "XFAIL due to Valgrind report";
+
+  Cpp::JitCall JC;
+  EXPECT_TRUE(JC.getKind() == Cpp::JitCall::kUnknown);
+
   std::vector<Decl*> Decls;
   std::string code = R"(
       typedef struct _name {

unittests/CppInterOp/InterpreterTest.cpp

@@ -221,7 +221,7 @@ TEST(InterpreterTest, DetectSystemCompilerIncludePaths) {
   EXPECT_FALSE(includes.empty());
 }
 
-TEST(InterpreterTest, GetIncludePaths) {
+TEST(InterpreterTest, IncludePaths) {
   std::vector<std::string> includes;
   Cpp::GetIncludePaths(includes);
   EXPECT_FALSE(includes.empty());
@@ -237,6 +237,11 @@ TEST(InterpreterTest, GetIncludePaths) {
   Cpp::GetIncludePaths(includes, true, true);
   EXPECT_FALSE(includes.empty());
   EXPECT_TRUE(includes.size() >= len);
+
+  len = includes.size();
+  Cpp::AddIncludePath("/non/existent/");
+  Cpp::GetIncludePaths(includes);
+  EXPECT_TRUE(includes.size() == len + 1);
 }
 
 TEST(InterpreterTest, CodeCompletion) {