1 files changed, 29 insertions, 0 deletions
diff --git a/tests/test_correct_year.py b/tests/test_correct_year.py
new file mode 100644
index 0000000..4ef77a6
--- /dev/null
+++ b/tests/test_correct_year.py
@@ -0,0 +1,29 @@
+"""Test copyright year adjustment"""
+import pytest
+
+
+@pytest.fixture(
+    params=[
+        # test with SOURCE_DATE_EPOCH unset: no modification
+        (None, '2006-2009'),
+        # test with SOURCE_DATE_EPOCH set: copyright year should be updated
+        ('1293840000', '2006-2011'),
+        ('1293839999', '2006-2010'),
+    ],
+
+)
+def expect_date(request, monkeypatch):
+    sde, expect = request.param
+    with monkeypatch.context() as m:
+        if sde:
+            m.setenv('SOURCE_DATE_EPOCH', sde)
+        else:
+            m.delenv('SOURCE_DATE_EPOCH', raising=False)
+        yield expect
+
+
+@pytest.mark.sphinx('html', testroot='correct-year')
+def test_correct_year(expect_date, app):
+    app.build()
+    content = (app.outdir / 'index.html').read_text(encoding='utf8')
+    assert expect_date in content