Use half-open intervals for time ranges

tests/test_reader.py

@@ -120,9 +120,9 @@ def bag(request: SubRequest, tmp_path: Path) -> Path:
 def test_reader(bag: Path):
     """Test reader and deserializer on simple bag."""
     with Reader(bag) as reader:
-        assert reader.duration == 42
+        assert reader.duration == 43
         assert reader.start_time == 666
-        assert reader.end_time == 708
+        assert reader.end_time == 709
         assert reader.message_count == 4
         if reader.compression_mode:
             assert reader.compression_format == 'zstd'

tests/test_reader1.py

@@ -198,9 +198,9 @@ def test_reader(tmp_path):  # pylint: disable=too-many-statements
     )
     with Reader(bag) as reader:
         assert reader.message_count == 1
-        assert reader.duration == 0
+        assert reader.duration == 1
         assert reader.start_time == 42 * 10**9
-        assert reader.end_time == 42 * 10**9
+        assert reader.end_time == 42 * 10**9 + 1
         assert len(reader.topics.keys()) == 1
         assert reader.topics['/topic0'].msgcount == 1
         msgs = list(reader.messages())
@@ -220,9 +220,9 @@ def test_reader(tmp_path):  # pylint: disable=too-many-statements
     )
     with Reader(bag) as reader:
         assert reader.message_count == 2
-        assert reader.duration == 5 * 10**9
+        assert reader.duration == 5 * 10**9 + 1
         assert reader.start_time == 5 * 10**9
-        assert reader.end_time == 10 * 10**9
+        assert reader.end_time == 10 * 10**9 + 1
         assert len(reader.topics.keys()) == 1
         assert reader.topics['/topic0'].msgcount == 2
         msgs = list(reader.messages())