1 files changed, 29 insertions, 0 deletions
diff --git a/tests/test_escape.py b/tests/test_escape.py
new file mode 100644
index 0000000..bf53fac
--- /dev/null
+++ b/tests/test_escape.py
@@ -0,0 +1,29 @@
+import pytest
+
+from markupsafe import Markup
+
+
+@pytest.mark.parametrize(
+    ("value", "expect"),
+    (
+        # empty
+        ("", ""),
+        # ascii
+        ("abcd&><'\"efgh", "abcd&amp;&gt;&lt;&#39;&#34;efgh"),
+        ("&><'\"efgh", "&amp;&gt;&lt;&#39;&#34;efgh"),
+        ("abcd&><'\"", "abcd&amp;&gt;&lt;&#39;&#34;"),
+        # 2 byte
+        ("こんにちは&><'\"こんばんは", "こんにちは&amp;&gt;&lt;&#39;&#34;こんばんは"),
+        ("&><'\"こんばんは", "&amp;&gt;&lt;&#39;&#34;こんばんは"),
+        ("こんにちは&><'\"", "こんにちは&amp;&gt;&lt;&#39;&#34;"),
+        # 4 byte
+        (
+            "\U0001F363\U0001F362&><'\"\U0001F37A xyz",
+            "\U0001F363\U0001F362&amp;&gt;&lt;&#39;&#34;\U0001F37A xyz",
+        ),
+        ("&><'\"\U0001F37A xyz", "&amp;&gt;&lt;&#39;&#34;\U0001F37A xyz"),
+        ("\U0001F363\U0001F362&><'\"", "\U0001F363\U0001F362&amp;&gt;&lt;&#39;&#34;"),
+    ),
+)
+def test_escape(escape, value, expect):
+    assert escape(value) == Markup(expect)