Scale fractional timestamp seconds to microseconds

Signed-off-by: Ali Zulfiqar <codewithfourtix@gmail.com>

Author: codewithfourtix

src/commoncode/timeutils.py

@@ -86,7 +86,7 @@ def tstamp2time(stamp):
     except Exception:
         microsec = None
     if microsec:
-        microsec = int(microsec)
+        microsec = int(microsec.ljust(6, "0")[:6])
         if 0 <= microsec <= 999999:
             datim = datim.replace(microsecond=microsec)
     return datim

tests/test_timeutils.py

@@ -192,3 +192,18 @@ def test_tstamp2time9(self):
 
     def test_tstamp2time_raise(self):
         self.assertRaises(ValueError, tstamp2time, "201011A12T13:14:15Z")
+
+
+    def test_tstamp2time_scales_fractional_seconds(self):
+        for fraction, expected in (
+            ("1", 100000),
+            ("12", 120000),
+            ("123", 123000),
+            ("001", 1000),
+            ("123456", 123456),
+            ("1234567", 123456),
+        ):
+            for prefix in ("2010-11-12T13:14:15", "20101112T131415"):
+                with self.subTest(fraction=fraction, prefix=prefix):
+                    result = tstamp2time(f"{prefix}.{fraction}Z")
+                    assert result.microsecond == expected