feat($arrow): add demo for arrow

python_boilerplate/demo/arrow_usage.py

@@ -0,0 +1,10 @@
+import arrow
+from arrow import Arrow
+
+
+def string_to_datetime(datetime: str) -> Arrow:
+    return arrow.get(datetime)
+
+
+def convert_time_zone(source: Arrow, target_time_zone: str) -> Arrow:
+    return source.to(target_time_zone)

tests/demo/test_arrow_usage.py

@@ -0,0 +1,32 @@
+import arrow
+from loguru import logger
+
+from python_boilerplate.demo.arrow_usage import convert_time_zone, string_to_datetime
+
+
+def test_string_to_datetime():
+    datetime = string_to_datetime("2022-01-01 15:15:00")
+    assert datetime is not None
+    tzinfo = datetime.tzinfo
+    assert tzinfo is not None
+    logger.info(f"Parsed time zone: {tzinfo}")
+    now = arrow.now()
+    assert datetime < now
+    logger.info(f"Now: {now}, datetime: {datetime}")
+
+
+def test_convert_time_zone():
+    now = arrow.now()
+    converted = convert_time_zone(now, "UTC+0")
+    logger.info(f"Now: {now}, converted UTC+0: {converted}")
+    assert converted is not None
+    converted = convert_time_zone(converted, "UTC+1")
+    tzinfo = converted.tzinfo
+    assert tzinfo is not None
+    logger.info(f"Now: {now}, converted UTC+1: {converted}")
+    assert converted is not None
+    converted = convert_time_zone(converted.shift(days=-1), "UTC+2")
+    logger.info(f"Now: {now}, converted UTC+2: {converted}")
+    assert converted is not None
+    assert converted < now
+    logger.info(f"Now: {now}, converted: {converted}")