add script to collect test results in JSON format

.gitignore

@@ -1,3 +1,5 @@
+archive/
+
 # Byte-compiled / optimized / DLL files
 __pycache__/
 *.py[cod]

scripts/build_testresult_db.py

@@ -0,0 +1,33 @@
+#!/usr/bin/env python
+
+import sys
+import os.path
+import datetime
+
+ROOTDIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+sys.path.insert(0, os.path.realpath(ROOTDIR))
+from gallery_dl import extractor, job, config
+
+tests = [
+   ([url[0] for url in extr.test], extr)
+   for extr in extractor.extractors()
+   if hasattr(extr, "test")
+]
+
+if len(sys.argv) > 1:
+    tests = [
+        (urls, extr)
+        for urls, extr in tests
+        if extr.category in sys.argv
+    ]
+
+path = os.path.join(ROOTDIR, "archive/testdb", str(datetime.date.today()))
+os.makedirs(path, exist_ok=True)
+config.load()
+
+for urls, extr in tests:
+    for i, url in enumerate(urls):
+        name = "%s-%s-%d.json" % (extr.category, extr.subcategory, i)
+        print(name)
+        with open(os.path.join(path, name), "w") as outfile:
+            job.DataJob(url, outfile).run()