From a971a3188bbf4588f86ab7977d2a81c933cdaf8e Mon Sep 17 00:00:00 2001
From: "Matthias J. Kannwischer" <matthias@kannwischer.eu>
Date: Tue, 18 Jun 2019 15:37:35 +0200
Subject: [PATCH] Revert "temporarily disable pre-processor test"

This reverts commit def5bddb62098afe134ed30dbeb82f0c195968cc.
---
 test/test_preprocessor.py | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 test/test_preprocessor.py

diff --git a/test/test_preprocessor.py b/test/test_preprocessor.py
new file mode 100644
index 00000000..043b7a50
--- /dev/null
+++ b/test/test_preprocessor.py
@@ -0,0 +1,36 @@
+import pqclean
+import helpers
+
+
+def test_preprocessor():
+    for scheme in pqclean.Scheme.all_schemes():
+        for implementation in scheme.implementations:
+            yield check_preprocessor, implementation
+
+
+@helpers.filtered_test
+def check_preprocessor(implementation: pqclean.Implementation):
+    cfiles = implementation.cfiles()
+    hfiles = implementation.hfiles()
+    errors = []
+    for file in hfiles + cfiles:
+        with open(file) as f:
+            for i, line in enumerate(f):
+                line = line.strip()
+                if file in hfiles and i == 0 and line.startswith('#ifndef'):
+                    continue
+                if line.startswith('#if'):
+                    errors.append("\n at {}:{}".format(file, i+1))
+    if errors:
+        raise AssertionError(
+            "Prohibited use of preprocessor conditional" + "".join(errors)
+        )
+
+
+if __name__ == "__main__":
+    try:
+        import nose2
+        nose2.main()
+    except ImportError:
+        import nose
+        nose.runmodule()