Fix binary diffs unable to be viewed in history. Resolves #1650 (#1649)

* Fix binary diffs cause error when viewed
* Change color of git lines to #000000a0
* Update assets

test/examples/lotr.git/logs/HEAD

@@ -10,3 +10,4 @@ cfea406f5f77afc7fb673a43e97721234385b1bd 629aa678272b017a4d136d35e77ac94d80b08dc
 563cc3701db990caf63e4ce9c3697a062890ca48 874f597a5659b4c3b153674ea04e406ff393975e Charles Pence <charles@charlespence.net> 1363478075 -0400	push
 874f597a5659b4c3b153674ea04e406ff393975e 7bdfe65face6f7cf9877d8c1d8c1dd974a63745e Nathan Lowe <techwiz96@gmail.com> 1421012322 -0500	push
 7bdfe65face6f7cf9877d8c1d8c1dd974a63745e f803c64d11407b23797325e3843f3f378b78f611 Dawa Ometto <dawa.ometto@phil.uu.nl> 1492034760 +0200	push
+f803c64d11407b23797325e3843f3f378b78f611 181c757cca395d4da18701d069a6b8123e88e040 ViChyavIn <nikita.vyach.ivanov@gmail.com> 1609841455 +0500	push

test/examples/lotr.git/logs/refs/heads/master

@@ -10,3 +10,4 @@ cfea406f5f77afc7fb673a43e97721234385b1bd 629aa678272b017a4d136d35e77ac94d80b08dc
 563cc3701db990caf63e4ce9c3697a062890ca48 874f597a5659b4c3b153674ea04e406ff393975e Charles Pence <charles@charlespence.net> 1363478075 -0400	push
 874f597a5659b4c3b153674ea04e406ff393975e 7bdfe65face6f7cf9877d8c1d8c1dd974a63745e Nathan Lowe <techwiz96@gmail.com> 1421012322 -0500	push
 7bdfe65face6f7cf9877d8c1d8c1dd974a63745e f803c64d11407b23797325e3843f3f378b78f611 Dawa Ometto <dawa.ometto@phil.uu.nl> 1492034760 +0200	push
+f803c64d11407b23797325e3843f3f378b78f611 181c757cca395d4da18701d069a6b8123e88e040 ViChyavIn <nikita.vyach.ivanov@gmail.com> 1609841455 +0500	push

test/examples/lotr.git/refs/heads/master

@@ -1 +1 @@
-f803c64d11407b23797325e3843f3f378b78f611
+181c757cca395d4da18701d069a6b8123e88e040

test/test_compare.rb

@@ -0,0 +1,47 @@
+# ~*~ encoding: utf-8 ~*~
+require File.expand_path(File.join(File.dirname(__FILE__), 'helper'))
+require File.expand_path '../../lib/gollum/views/commit', __FILE__
+
+def get_commit_diff(sha1)
+  commit = @wiki.repo.commit(sha1)
+  @wiki.repo.diff(commit.parent.id, sha1)
+end
+
+context "Precious::Views::Compare" do
+  setup do
+    @path    = cloned_testpath('examples/lotr.git')
+    # Precious::App.set(:gollum_path, @path)
+    @wiki = Gollum::Wiki.new(@path)
+  end
+
+  test 'file addition diff' do
+    view = Precious::Views::Compare.new
+    diff = get_commit_diff 'fbabba862dfa7ac35b39042dd4ad780c9f67b8cb'
+    view.instance_variable_set(:@diff, diff)
+
+    assert_equal [
+      {:line=>"@@ -0,0 +1 @@", :class=>"gc", :ldln=>"...", :rdln=>"..."},
+      {:line=>"+# Eye Of Sauron", :class=>"gi", :ldln=>" ", :rdln=>"1"}
+    ], view.lines
+  end
+
+  test 'empty file addition diff' do
+    view = Precious::Views::Compare.new
+    diff = get_commit_diff '181c757cca395d4da18701d069a6b8123e88e040'
+    view.instance_variable_set(:@diff, diff)
+
+    assert_equal [], view.lines
+  end
+
+  test 'binary file addition diff' do
+    view = Precious::Views::Compare.new
+    diff = get_commit_diff 'afe2034d400ba21e13361f38f74900c51dbc7fde'
+    view.instance_variable_set(:@diff, diff)
+
+    lines = view.lines
+    line = lines[0].delete :line
+
+    assert_match %r{Binary files (/dev/null and b/Mordor/eye.jpg )?differ}, line
+    assert_equal [{:class=>"gg", :ldln=>"...", :rdln=>"..."}], lines
+  end
+end

test/test_latest_changes_view.rb

@@ -35,9 +35,11 @@ context 'Precious::Views::LatestChanges' do
     get(@url)
     body = last_response.body
 
+    commits_list_elements = body.scan(%r{<li class="Box-row Box-row--hover-gray border-top d-flex flex-items-center">})
+    assert !commits_list_elements.nil?, "the commits should be listed with this tag"
+    assert commits_list_elements.length == 10, "/latest_changes should include the :pagination_count commit"
+
     assert body.include?("Charles Pence</span>"), "/latest_changes should include Author Charles Pence"
-    assert body.include?('1db89eb'), "/latest_changes should include the :pagination_count commit"
-    assert !body.include?('a8ad3c0'), "/latest_changes should not include more than :pagination_count commits"
     assert body.include?('<a href="/Data-Two.csv/874f597a5659b4c3b153674ea04e406ff393975e">Data-Two.csv</a>'), "/latest_changes include links to modified files in #{body}"
     assert body.include?('<a href="/Hobbit.md/874f597a5659b4c3b153674ea04e406ff393975e">Hobbit.md</a>'), "/latest_changes should include links to modified pages in #{body}"
   end