1 files changed, 15 insertions, 2 deletions
diff --git a/spec/lib/gitlab/diff/inline_diff_spec.rb b/spec/lib/gitlab/diff/inline_diff_spec.rb
index 056917df893..95a993d26cf 100644
--- a/spec/lib/gitlab/diff/inline_diff_spec.rb
+++ b/spec/lib/gitlab/diff/inline_diff_spec.rb
@@ -1,7 +1,7 @@
 require 'spec_helper'
 
 describe Gitlab::Diff::InlineDiff, lib: true do
-  describe '#inline_diffs' do
+  describe '.for_lines' do
     let(:diff) do
       <<eos
  class Test
@@ -13,7 +13,7 @@ describe Gitlab::Diff::InlineDiff, lib: true do
 eos
     end
 
-    let(:subject) { Gitlab::Diff::InlineDiff.new(diff.lines).inline_diffs }
+    let(:subject) { described_class.for_lines(diff.lines) }
 
     it 'finds all inline diffs' do
       expect(subject[0]).to be_nil
@@ -24,4 +24,17 @@ eos
       expect(subject[5]).to be_nil
     end
   end
+
+  describe "#inline_diffs" do
+    let(:old_line) { "XXX def initialize(test = true)" }
+    let(:new_line) { "YYY def initialize(test = false)" }
+    let(:subject) { described_class.new(old_line, new_line, offset: 3).inline_diffs }
+
+    it "finds the inline diff" do
+      old_diffs, new_diffs = subject
+
+      expect(old_diffs).to eq([26..28])
+      expect(new_diffs).to eq([26..29])
+    end
+  end
 end