scripts: Add regression test runner/checker

scripts/check_regression_tests.py

@@ -0,0 +1,81 @@
+import argparse
+import glob
+import sys
+import os
+import re
+import hashlib
+
+from pathlib import Path
+
+def compare_frames(path1, path2):
+    try:
+        with open(path1, "rb") as f:
+            hash1 = hashlib.md5(f.read()).digest()
+        with open(path2, "rb") as f:
+            hash2 = hashlib.md5(f.read()).digest()
+
+        #print(hash1, hash2)
+        return hash1 == hash2
+    except:
+        return False
+
+
+def check_regression_test(baselinedir, testdir, name):
+    #print("Checking '%s'..." % name)
+
+    dir1 = os.path.join(baselinedir, name)
+    dir2 = os.path.join(testdir, name)
+    if not os.path.isdir(dir2):
+        #print("*** %s is missing in test set" % name)
+        return False
+
+    images = glob.glob(os.path.join(dir1, "frame_*.png"))
+    for imagepath in images:
+        imagename = Path(imagepath).name
+        matches = re.match("frame_([0-9]+).png", imagename)
+        if matches is None:
+            continue
+
+        framenum = int(matches[1])
+        
+        path1 = os.path.join(dir1, imagename)
+        path2 = os.path.join(dir2, imagename)
+        if not os.path.isfile(path2):
+            print("--- Frame %u for %s is missing in test set" % (framenum, name))
+            return False
+
+        if not compare_frames(path1, path2):
+            print("*** Difference in frame %u for %s" % (framenum, name))
+            return False
+
+    return True
+
+
+def check_regression_tests(baselinedir, testdir):
+    gamedirs = glob.glob(baselinedir + "/*", recursive=False)
+    
+    success = 0
+    failure = 0
+
+    for gamedir in gamedirs:
+        name = Path(gamedir).name
+        if check_regression_test(baselinedir, testdir, name):
+            success += 1
+        else:
+            failure += 1
+
+    return (failure == 0)
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description="Check frame dump images for regression tests")
+    parser.add_argument("-baselinedir", action="store", required=True, help="Directory containing baseline frames to check against")
+    parser.add_argument("-testdir", action="store", required=True, help="Directory containing frames to check")
+
+    args = parser.parse_args()
+
+    if not check_regression_tests(os.path.realpath(args.baselinedir), os.path.realpath(args.testdir)):
+        sys.exit(1)
+    else:
+        sys.exit(0)
+