tests: added for Page.pdf (#41)

Author: mxschmitt

setup.cfg

@@ -1,4 +1,6 @@
 [tool:pytest]
-markers = skip_browser
+markers =
+    skip_browser
+    only_browser
 [mypy]
 ignore_missing_imports = True

tests/conftest.py

@@ -111,9 +111,21 @@ def is_chromium(browser_name):
 
 @pytest.fixture(autouse=True)
 def skip_by_browser(request, browser_name):
-    if request.node.get_closest_marker("skip_browser"):
-        if request.node.get_closest_marker("skip_browser").args[0] == browser_name:
-            pytest.skip("skipped on this platform: {}".format(browser_name))
+    skip_browsers_names = []
+
+    # Allowlist
+    only_browser_marker = request.node.get_closest_marker("only_browser")
+    if only_browser_marker:
+        skip_browsers_names = ["chromium", "firefox", "webkit"]
+        skip_browsers_names.remove(only_browser_marker.args[0])
+
+    # Denylist
+    skip_browser_marker = request.node.get_closest_marker("skip_browser")
+    if skip_browser_marker:
+        skip_browsers_names.append(skip_browser_marker.args[0])
+
+    if browser_name in skip_browsers_names:
+        pytest.skip("skipped on this platform: {}".format(browser_name))
 
 
 def pytest_addoption(parser):

tests/test_pdf.py

@@ -0,0 +1,25 @@
+# Copyright (c) Microsoft Corporation.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+import pytest
+
+from playwright.page import Page
+
+
+@pytest.mark.only_browser("chromium")
+async def test_should_be_able_to_save_pdf_file(page: Page, server, tmpdir):
+    output_file = tmpdir / "foo.png"
+    await page.pdf(path=str(output_file))
+    assert os.path.getsize(output_file) > 0