1 files changed, 138 insertions, 0 deletions
diff --git a/tests/middleware/test_if_none_match.py b/tests/middleware/test_if_none_match.py
new file mode 100644
index 0000000..8456c05
--- /dev/null
+++ b/tests/middleware/test_if_none_match.py
@@ -0,0 +1,138 @@
+from wsgiref.validate import validator
+
+import pytest
+
+from paste import if_none_match
+
+from ..common_wsgi import call_app
+
+ETAG = "1234"
+
+
+@pytest.fixture
+def app():
+    @validator
+    @if_none_match
+    @validator
+    def app(environ, start_response):
+        body = b"Hello, world!"
+        etag_header = ("ETag", f'"{ETAG}"')
+        if environ["REQUEST_METHOD"] == "HEAD":
+            start_response(
+                "200 OK",
+                [
+                    ("Content-Type", "text/plain"),
+                    ("Content-Length", str(len(body))),
+                    etag_header,
+                ],
+            )
+            return []
+        start_response("200 OK", [("Content-Type", "text/plain"), etag_header])
+        return [body]
+
+    return app
+
+
+@pytest.mark.parametrize("method", ["POST", "PUT", "DELETE"])
+def test_non_get_or_head_request_passthrough(app, method):
+    environ = {"REQUEST_METHOD": method, "HTTP_IF_NONE_MATCH": f'"{ETAG}"'}
+    response = call_app(app, environ)
+    assert response.data == b"Hello, world!"
+    assert response.status == "200 OK"
+    assert ("Content-Type", "text/plain") in response.headers
+
+
+def test_if_none_match_header_not_set(app):
+    environ = {"REQUEST_METHOD": "GET"}
+    response = call_app(app, environ)
+    assert response.data == b"Hello, world!"
+    assert response.status == "200 OK"
+    assert ("Content-Type", "text/plain") in response.headers
+
+
+@pytest.mark.parametrize("value", [f'"{ETAG}"', f'W/"{ETAG}"'])
+def test_etag_matches_if_none_match_header(app, value):
+    environ = {"REQUEST_METHOD": "GET", "HTTP_IF_NONE_MATCH": value}
+    response = call_app(app, environ)
+    assert response.data == b""
+    assert response.status == "304 Not Modified"
+
+
+@pytest.mark.parametrize(
+    "value",
+    [
+        f'"{ETAG}", "54321"',
+        f'"54321", "{ETAG}", "098765"',
+        f'"54321", "{ETAG}"',
+        f'W/"{ETAG}", "54321"',
+        f'"54321", W/"{ETAG}", "098765"',
+        f'"54321", W/"{ETAG}"',
+    ],
+)
+def test_etag_matches_if_none_match_header_list(app, value):
+    environ = {"REQUEST_METHOD": "GET", "HTTP_IF_NONE_MATCH": value}
+    response = call_app(app, environ)
+    assert response.data == b""
+    assert response.status == "304 Not Modified"
+
+
+def test_etag_matches_if_none_match_header_list2(app):
+    environ = {"REQUEST_METHOD": "GET", "HTTP_IF_NONE_MATCH": f'"54321", "{ETAG}"'}
+    response = call_app(app, environ)
+    assert response.data == b""
+    assert response.status == "304 Not Modified"
+
+
+def test_etag_matches_if_none_match_header_star(app):
+    environ = {"REQUEST_METHOD": "GET", "HTTP_IF_NONE_MATCH": "*"}
+    response = call_app(app, environ)
+    assert response.data == b""
+    assert response.status == "304 Not Modified"
+
+
+def test_missing_etag_does_not_match_if_none_match_header_star():
+    @validator
+    @if_none_match
+    @validator
+    def app(environ, start_response):
+        body = b"Hello, world!"
+        if environ["REQUEST_METHOD"] == "HEAD":
+            start_response(
+                "200 OK",
+                [
+                    ("Content-Type", "text/plain"),
+                    ("Content-Length", str(len(body))),
+                ],
+            )
+            return []
+        start_response("200 OK", [("Content-Type", "text/plain")])
+        return [body]
+
+    environ = {"REQUEST_METHOD": "GET", "HTTP_IF_NONE_MATCH": "*"}
+    response = call_app(app, environ)
+    assert response.data == b"Hello, world!"
+    assert response.status == "200 OK"
+
+
+def test_etag_does_not_match_if_none_match_header(app):
+    environ = {"REQUEST_METHOD": "GET", "HTTP_IF_NONE_MATCH": '"54321"'}
+    response = call_app(app, environ)
+    assert response.data == b"Hello, world!"
+    assert response.status == "200 OK"
+    assert ("Content-Type", "text/plain") in response.headers
+
+
+def test_etag_does_not_match_if_none_match_header_list(app):
+    environ = {"REQUEST_METHOD": "GET", "HTTP_IF_NONE_MATCH": '"123","4567","*"'}
+    response = call_app(app, environ)
+    assert response.data == b"Hello, world!"
+    assert response.status == "200 OK"
+    assert ("Content-Type", "text/plain") in response.headers
+
+
+def test_etag_does_not_match_if_none_match_malformed_header(app):
+    environ = {"REQUEST_METHOD": "GET", "HTTP_IF_NONE_MATCH": "{ETAG}"}
+    response = call_app(app, environ)
+    assert response.data == b"400 Bad Request\n"
+    assert response.status == "400 Bad Request"
+    assert ("Content-Type", "text/plain") in response.headers