Add a test for cpp

run_tests.py

@@ -46,6 +46,7 @@ def main():
         ast_openmp = test.get("ast_openmp", False)
         asr = test.get("asr", False)
         llvm = test.get("llvm", False)
+        cpp = test.get("cpp", False)
         obj = test.get("obj", False)
         bin_ = test.get("bin", False)
 
@@ -85,6 +86,11 @@ def main():
             else:
                 run_test("llvm", "lfortran --show-llvm {infile} -o {outfile}",
                         filename, update_reference)
+
+        if cpp:
+            run_test("cpp", "lfortran --show-cpp {infile}",
+                    filename, update_reference)
+
         if obj:
             if no_llvm:
                 print("    * obj    SKIPPED as requested")

tests/reference/cpp-program1-1f9dddd.json

@@ -0,0 +1,13 @@
+{
+    "basename": "cpp-program1-1f9dddd",
+    "cmd": "lfortran --show-cpp {infile}",
+    "infile": "tests/program1.f90",
+    "infile_hash": "ec4ccdfed01d45648718ca57a9ceb3e5aa82e55e57d8906636902e7b",
+    "outfile": null,
+    "outfile_hash": null,
+    "stdout": "cpp-program1-1f9dddd.stdout",
+    "stdout_hash": "ddc89093984deb702b806404031ee1178023c01be77917f2b60d532a",
+    "stderr": null,
+    "stderr_hash": null,
+    "returncode": 0
+}

tests/reference/cpp-program1-1f9dddd.stdout

@@ -0,0 +1,4 @@
+int main()
+{
+    return 0;
+}

tests/tests.toml

@@ -121,6 +121,7 @@ ast = true
 asr = true
 llvm = true
 obj = true
+cpp = true
 
 [[test]]
 filename = "../integration_tests/program_cmake_01.f90"