Add basic tests for `bot.pagination`.

1 files changed, 29 insertions, 0 deletions

diff --git a/tests/test_pagination.py b/tests/test_pagination.py
new file mode 100644
index 000000000..11d6541ae
--- /dev/null
+++ b/tests/test_pagination.py
@@ -0,0 +1,29 @@
+from unittest import TestCase
+
+import pytest
+
+from bot import pagination
+
+
+class LinePaginatorTests(TestCase):
+    def setUp(self):
+        self.paginator = pagination.LinePaginator(prefix='', suffix='', max_size=30)
+
+    def test_add_line_raises_on_too_long_lines(self):
+        message = f"Line exceeds maximum page size {self.paginator.max_size - 2}"
+        with pytest.raises(RuntimeError, match=message):
+            self.paginator.add_line('x' * self.paginator.max_size)
+
+    def test_add_line_works_on_small_lines(self):
+        self.paginator.add_line('x' * (self.paginator.max_size - 3))
+
+
+class ImagePaginatorTests(TestCase):
+    def setUp(self):
+        self.paginator = pagination.ImagePaginator()
+
+    def test_add_image_appends_image(self):
+        image = 'lemon'
+        self.paginator.add_image(image)
+
+        assert self.paginator.images == [image]