1 files changed, 38 insertions, 0 deletions
diff --git a/tests/pyb/modtime.py b/tests/pyb/modtime.py
new file mode 100644
index 0000000000..de6f8fbc6b
--- /dev/null
+++ b/tests/pyb/modtime.py
@@ -0,0 +1,38 @@
+import time
+
+DAYS_PER_MONTH = [0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
+
+def is_leap(year):
+    return (year % 4) == 0
+
+def test():
+    seconds = 0
+    wday = 5    # Jan 1, 2000 was a Saturday
+    for year in range(2000, 2034):
+        print("Testing %d" % year)
+        yday = 1
+        for month in range(1, 13):
+            if month == 2 and is_leap(year):
+                DAYS_PER_MONTH[2] = 29
+            else:
+                DAYS_PER_MONTH[2] = 28
+            for day in range(1, DAYS_PER_MONTH[month] + 1):
+                secs = time.mktime((year, month, day, 0, 0, 0, 0, 0))
+                if secs != seconds:
+                    print("mktime failed for %d-%02d-%02d got %d expected %d" % (year, month, day, secs, seconds))
+                tuple = time.localtime(seconds)
+                secs = time.mktime(tuple)
+                if secs != seconds:
+                    print("localtime failed for %d-%02d-%02d got %d expected %d" % (year, month, day, secs, seconds))
+                    return
+                seconds += 86400
+                if yday != tuple[7]:
+                    print("locatime for %d-%02d-%02d got yday %d, expecting %d" % (year, month, day, tuple[7], yday))
+                    return
+                if wday != tuple[6]:
+                    print("locatime for %d-%02d-%02d got wday %d, expecting %d" % (year, month, day, tuple[6], wday))
+                    return
+                yday += 1
+                wday = (wday + 1) % 7
+
+test()