1 files changed, 70 insertions, 0 deletions
diff --git a/tests/interval/test_in_words.py b/tests/interval/test_in_words.py
new file mode 100644
index 0000000..410e11f
--- /dev/null
+++ b/tests/interval/test_in_words.py
@@ -0,0 +1,70 @@
+from __future__ import annotations
+
+import pendulum
+
+
+def test_week():
+    start_date = pendulum.datetime(2012, 1, 1)
+    period = pendulum.interval(start=start_date, end=start_date.add(weeks=1))
+    assert period.in_words() == "1 week"
+
+
+def test_week_and_day():
+    start_date = pendulum.datetime(2012, 1, 1)
+    period = pendulum.interval(start=start_date, end=start_date.add(weeks=1, days=1))
+    assert period.in_words() == "1 week 1 day"
+
+
+def test_all():
+    start_date = pendulum.datetime(2012, 1, 1)
+    period = pendulum.interval(
+        start=start_date,
+        end=start_date.add(years=1, months=1, days=1, seconds=1, microseconds=1),
+    )
+    assert period.in_words() == "1 year 1 month 1 day 1 second"
+
+
+def test_in_french():
+    start_date = pendulum.datetime(2012, 1, 1)
+    period = pendulum.interval(
+        start=start_date,
+        end=start_date.add(years=1, months=1, days=1, seconds=1, microseconds=1),
+    )
+    assert period.in_words(locale="fr") == "1 an 1 mois 1 jour 1 seconde"
+
+
+def test_singular_negative_values():
+    start_date = pendulum.datetime(2012, 1, 1)
+    period = pendulum.interval(start=start_date, end=start_date.subtract(days=1))
+    assert period.in_words() == "-1 day"
+
+
+def test_separator():
+    start_date = pendulum.datetime(2012, 1, 1)
+    period = pendulum.interval(
+        start=start_date,
+        end=start_date.add(years=1, months=1, days=1, seconds=1, microseconds=1),
+    )
+    assert period.in_words(separator=", ") == "1 year, 1 month, 1 day, 1 second"
+
+
+def test_subseconds():
+    start_date = pendulum.datetime(2012, 1, 1)
+    period = pendulum.interval(
+        start=start_date, end=start_date.add(microseconds=123456)
+    )
+    assert period.in_words() == "0.12 second"
+
+
+def test_subseconds_with_seconds():
+    start_date = pendulum.datetime(2012, 1, 1)
+    period = pendulum.interval(
+        start=start_date, end=start_date.add(seconds=12, microseconds=123456)
+    )
+    assert period.in_words() == "12 seconds"
+
+
+def test_zero_period():
+    start_date = pendulum.datetime(2012, 1, 1)
+    period = pendulum.interval(start=start_date, end=start_date)
+    assert period.in_words() == "0 microseconds"