Fix git blame syntax highlighting when different commits break up lines

Closes #1521

1 files changed, 33 insertions, 0 deletions

diff --git a/spec/helpers/blob_helper_spec.rb b/spec/helpers/blob_helper_spec.rb
new file mode 100644
index 00000000000..e49e4e6d5d8
--- /dev/null
+++ b/spec/helpers/blob_helper_spec.rb
@@ -0,0 +1,33 @@
+require 'spec_helper'
+
+describe BlobHelper do
+  describe 'highlight' do
+    let(:blob_name) { 'test.lisp' }
+    let(:no_context_content) { ":type \"assem\"))" }
+    let(:blob_content) { "(make-pathname :defaults name\n#{no_context_content}" }
+    let(:split_content) { blob_content.split("\n") }
+
+    it 'should return plaintext for unknown lexer context' do
+      result = highlight(blob_name, no_context_content, nowrap: true, continue: false)
+      expect(result).to eq('<span id="LC1" class="line">:type &quot;assem&quot;))</span>')
+    end
+
+    it 'should highlight single block' do
+      expected = %Q[<span id="LC1" class="line"><span class="p">(</span><span class="nb">make-pathname</span> <span class="ss">:defaults</span> <span class="nv">name</span></span>
+<span id="LC2" class="line"><span class="ss">:type</span> <span class="s">&quot;assem&quot;</span><span class="p">))</span></span>]
+
+      expect(highlight(blob_name, blob_content, nowrap: true, continue: false)).to eq(expected)
+    end
+
+    it 'should highlight continued blocks' do
+      # Both lines have LC1 as ID since formatter doesn't support continue at the moment
+      expected = [
+        '<span id="LC1" class="line"><span class="p">(</span><span class="nb">make-pathname</span> <span class="ss">:defaults</span> <span class="nv">name</span></span>',
+        '<span id="LC1" class="line"><span class="ss">:type</span> <span class="s">&quot;assem&quot;</span><span class="p">))</span></span>'
+      ]
+
+      result = split_content.map{ |content| highlight(blob_name, content, nowrap: true, continue: true) }
+      expect(result).to eq(expected)
+    end
+  end
+end