Remove unnecessary test and don't pass namespace on precompiled select

2 files changed, 20 insertions, 25 deletions

diff --git a/bs4/css.py b/bs4/css.py
index b237051..ac89759 100644
--- a/bs4/css.py
+++ b/bs4/css.py
@@ -55,9 +55,9 @@ class CSS(object):
             )
         return self.api.escape(ident)
 
-    def _ns(self, ns):
+    def _ns(self, ns, select):
         """Normalize a dictionary of namespaces."""
-        if ns is None:
+        if not isinstance(select, self.api.SoupSieve) and ns is None:
             ns = self.tag._namespaces
         return ns
 
@@ -99,7 +99,7 @@ class CSS(object):
 
         """
         return self.api.select_one(
-            select, self.tag, self._ns(namespaces), flags, **kwargs
+            select, self.tag, self._ns(namespaces, select), flags, **kwargs
         )
 
     def select(self, select, namespaces=None, limit=0, flags=0, **kwargs):
@@ -133,7 +133,7 @@ class CSS(object):
 
         return self._rs(
             self.api.select(
-                select, self.tag, self._ns(namespaces), limit, flags,
+                select, self.tag, self._ns(namespaces, select), limit, flags,
                 **kwargs
             )
         )
@@ -165,7 +165,7 @@ class CSS(object):
         :rtype: types.GeneratorType
         """
         return self.api.iselect(
-            select, self.tag, self._ns(namespaces), limit, flags, **kwargs
+            select, self.tag, self._ns(namespaces, select), limit, flags, **kwargs
         )
 
     def closest(self, select, namespaces=None, flags=0, **kwargs):
@@ -193,7 +193,7 @@ class CSS(object):
 
         """
         return self.api.closest(
-            select, self.tag, self._ns(namespaces), flags, **kwargs
+            select, self.tag, self._ns(namespaces, select), flags, **kwargs
         )
 
     def match(self, select, namespaces=None, flags=0, **kwargs):
@@ -220,7 +220,7 @@ class CSS(object):
         :rtype: bool
         """
         return self.api.match(
-            select, self.tag, self._ns(namespaces), flags, **kwargs
+            select, self.tag, self._ns(namespaces, select), flags, **kwargs
         )
 
     def filter(self, select, namespaces=None, flags=0, **kwargs):
@@ -248,6 +248,6 @@ class CSS(object):
         """
         return self._rs(
             self.api.filter(
-                select, self.tag, self._ns(namespaces), flags, **kwargs
+                select, self.tag, self._ns(namespaces, select), flags, **kwargs
             )
         )
diff --git a/bs4/tests/test_css.py b/bs4/tests/test_css.py
index cf73831..c9ade48 100644
--- a/bs4/tests/test_css.py
+++ b/bs4/tests/test_css.py
@@ -15,6 +15,7 @@ from . import (
 
 if SOUP_SIEVE_PRESENT:
     from soupsieve import SelectorSyntaxError
+    from soupsieve import compile as sv_compile
 
 
 @pytest.mark.skipif(not SOUP_SIEVE_PRESENT, reason="Soup Sieve not installed")
@@ -94,6 +95,17 @@ class TestCSSSelectors(SoupTest):
         for selector, expected_ids in tests:
             self.assert_selects(selector, expected_ids)
 
+    def test_precompiled(self):
+        sel = sv_compile('div')
+
+        els = self.soup.select(sel)
+        assert len(els) == 4
+        for div in els:
+            assert div.name == 'div'
+
+        el = self.soup.select_one(sel)
+        assert 'main' == el['id']
+
     def test_one_tag_one(self):
         els = self.soup.select('title')
         assert len(els) == 1
@@ -474,20 +486,3 @@ class TestCSSSelectors(SoupTest):
         assert m(".foo#bar") == '\\.foo\\#bar'
         assert m("()[]{}") == '\\(\\)\\[\\]\\{\\}'
         assert m(".foo") == self.soup.css.escape(".foo")
-        
-    def test_api_replacement(self):
-        # You can pass in another object to act as a drop-in
-        # replacement for the soupsieve module.
-        class Mock():
-            attribute = "value"
-            pass
-        mock_soupsieve = Mock()
-        mock_soupsieve.escape = MagicMock()
-
-        # If an unknown method turns out to be present in Soup Sieve,
-        # we may still be able to call it.
-        css = CSS(self.soup, api=mock_soupsieve)
-        css.escape("identifier")
-        mock_soupsieve.escape.assert_called_with(
-            "selector", self.soup, 1, flags=0
-        )