Change some ok_'s to eq_'s in testing.

ok_ is being used in some places where eq_ was intended.

Also, change test_some_bytes_visible in test_binary_files.py to drop the test
checking that we 404 on a /source/ page for binary files - we're now supporting
that scenario (and haven't been 404ing in any case, at least not in the recent
past).

tests/test_binary_files/test_binary_files.py

@@ -1,5 +1,5 @@
 from dxr.testing import DxrInstanceTestCase
-from nose.tools import ok_
+from nose.tools import ok_, eq_
 
 class BinaryFileTests(DxrInstanceTestCase):
     """Tests that we show something for binary files like images."""
@@ -9,21 +9,21 @@ def test_png(self):
         response = self.client().get('/code/source/red_circle.png')
         ok_('src="/code/raw/red_circle.png"' in response.data)
         response = self.client().get('/code/raw/red_circle.png')
-        ok_(response.status_code, 200)
+        eq_(response.status_code, 200)
 
     def test_jpeg(self):
         """Make sure we show a preview of the jpeg."""
         response = self.client().get('/code/source/small_blue_circle.jpeg')
         ok_('src="/code/raw/small_blue_circle.jpeg"' in response.data)
         response = self.client().get('/code/raw/small_blue_circle.jpeg')
-        ok_(response.status_code, 200)
+        eq_(response.status_code, 200)
 
     def test_jpg(self):
         """Make sure we show a preview of the jpg."""
         response = self.client().get('/code/source/Green circle.jpg')
         ok_('src="/code/raw/Green%20circle.jpg"' in response.data)
         response = self.client().get('/code/raw/Green circle.jpg')
-        ok_(response.status_code, 200)
+        eq_(response.status_code, 200)
 
     def test_too_fat(self):
         """Make sure we don't show the preview icon for a file that's too big."""
@@ -35,14 +35,13 @@ def test_svg(self):
         response = self.client().get('/code/source/yellow_circle.svg')
         ok_('href="/code/raw/yellow_circle.svg"' in response.data)
         response = self.client().get('/code/raw/yellow_circle.svg')
-        ok_(response.status_code, 200)
+        eq_(response.status_code, 200)
 
     def test_some_bytes_visible(self):
-        """We want some_bytes to show in the folder index, but without its own page."""
+        """We want some_bytes to show in the folder index, but not be clickable."""
         response = self.client().get('/code/source/')
         ok_('some_bytes' in response.data)
-        response = self.client().get('/code/source/some_bytes')
-        ok_(response.status_code, 404)
+        ok_('href="/code/source/some_bytes"' not in response.data)
 
     def test_some_bytes_not_searchable(self):
         """We want some_bytes to show on search page, but not be clickable."""

tests/test_vcs_hg/test_vcs_hg.py

@@ -4,7 +4,7 @@
 from dxr.testing import DxrInstanceTestCaseMakeFirst
 
 from nose import SkipTest
-from nose.tools import ok_
+from nose.tools import ok_, eq_
 
 
 class MercurialTests(DxrInstanceTestCaseMakeFirst):
@@ -46,4 +46,4 @@ def test_permalink(self):
         response = self.client().get('/code/source/Colon: name')
         ok_('/rev/84798105c9ab5897f8c7d630d133d9003b44a62f/Colon:%20name" title="Permalink" class="permalink icon">Permalink</a>' in response.data)
         response = self.client().get('/code/rev/84798105c9ab5897f8c7d630d133d9003b44a62f/Colon: name')
-        ok_(response.status_code, 200)
+        eq_(response.status_code, 200)