Move URL tests to a separate file; a few test for equality / inequality

tests/test_page_inputs.py

@@ -6,7 +6,6 @@
 import parsel
 
 from web_poet import RequestUrl, ResponseUrl
-from web_poet._base import _Url
 from web_poet.page_inputs import (
     HttpRequest,
     HttpResponse,
@@ -445,31 +444,3 @@ def test_browser_html():
     assert html.xpath("//p/text()").getall() == ["Hello, ", "world!"]
     assert html.css("p::text").getall() == ["Hello, ", "world!"]
     assert isinstance(html.selector, parsel.Selector)
-
-
-def test_url_base_class():
-    url_str = "http://example.com"
-    url = _Url(url_str)
-    assert str(url) == url_str
-    assert repr(url) == "_Url('http://example.com')"
-
-    with pytest.raises(TypeError):
-        _Url(123)
-
-
-def test_url_subclass():
-    url_str = "http://example.com"
-
-    class MyUrl(_Url):
-        pass
-
-    class MyUrl2(_Url):
-        pass
-
-    url = MyUrl(url_str)
-    assert str(url) == url_str
-    assert url._url == url_str
-    assert repr(url) == "MyUrl('http://example.com')"
-
-    url2 = MyUrl2(url)
-    assert str(url2) == str(url)

tests/test_url.py

@@ -0,0 +1,51 @@
+import pytest
+
+from web_poet._base import _Url
+from web_poet import RequestUrl, ResponseUrl
+
+
+def test_url_base_class():
+    url_str = "http://example.com"
+    url = _Url(url_str)
+    assert str(url) == url_str
+    assert repr(url) == "_Url('http://example.com')"
+
+
+def test_url_init_validation():
+    with pytest.raises(TypeError):
+        _Url(123)
+
+
+def test_url_subclasses():
+    url_str = "http://example.com"
+
+    class MyUrl(_Url):
+        pass
+
+    class MyUrl2(_Url):
+        pass
+
+    url = MyUrl(url_str)
+    assert str(url) == url_str
+    assert url._url == url_str
+    assert repr(url) == "MyUrl('http://example.com')"
+
+    url2 = MyUrl2(url)
+    assert str(url2) == str(url)
+
+
+@pytest.mark.parametrize('url_cls', [_Url, RequestUrl, ResponseUrl])
+def test_str_equality(url_cls):
+    url_str = "http://example.com#foo"
+    url = url_cls(url_str)
+    assert url != url_str
+    assert str(url) == url_str
+
+
+def test_url_classes_eq():
+    url_str = "http://example.com#foo"
+    request_url = RequestUrl(url_str)
+    response_url = ResponseUrl(url_str)
+
+    assert request_url != response_url
+    assert str(request_url) == str(response_url)