1 files changed, 175 insertions, 0 deletions
diff --git a/spec/services/notes/diff_position_update_service_spec.rb b/spec/services/notes/diff_position_update_service_spec.rb
new file mode 100644
index 00000000000..110efb54fa0
--- /dev/null
+++ b/spec/services/notes/diff_position_update_service_spec.rb
@@ -0,0 +1,175 @@
+require 'spec_helper'
+
+describe Notes::DiffPositionUpdateService, services: true do
+  let(:project) { create(:project) }
+  let(:create_commit) { project.commit("913c66a37b4a45b9769037c55c2d238bd0942d2e") }
+  let(:modify_commit) { project.commit("874797c3a73b60d2187ed6e2fcabd289ff75171e") }
+  let(:edit_commit) { project.commit("570e7b2abdd848b95f2f578043fc23bd6f6fd24d") }
+
+  let(:path) { "files/ruby/popen.rb" }
+
+  let(:old_diff_refs) do
+    Gitlab::Diff::DiffRefs.new(
+      base_sha: create_commit.parent_id,
+      head_sha: modify_commit.sha
+    )
+  end
+
+  let(:new_diff_refs) do
+    Gitlab::Diff::DiffRefs.new(
+      base_sha: create_commit.parent_id,
+      head_sha: edit_commit.sha
+    )
+  end
+
+  subject do
+    described_class.new(
+      project,
+      nil,
+      old_diff_refs: old_diff_refs,
+      new_diff_refs: new_diff_refs,
+      paths: [path]
+    )
+  end
+
+  # old diff:
+  #     1 + require 'fileutils'
+  #     2 + require 'open3'
+  #     3 +
+  #     4 + module Popen
+  #     5 +   extend self
+  #     6 +
+  #     7 +   def popen(cmd, path=nil)
+  #     8 +     unless cmd.is_a?(Array)
+  #     9 +       raise "System commands must be given as an array of strings"
+  #    10 +     end
+  #    11 +
+  #    12 +     path ||= Dir.pwd
+  #    13 +     vars = { "PWD" => path }
+  #    14 +     options = { chdir: path }
+  #    15 +
+  #    16 +     unless File.directory?(path)
+  #    17 +       FileUtils.mkdir_p(path)
+  #    18 +     end
+  #    19 +
+  #    20 +     @cmd_output = ""
+  #    21 +     @cmd_status = 0
+  #    22 +     Open3.popen3(vars, *cmd, options) do |stdin, stdout, stderr, wait_thr|
+  #    23 +       @cmd_output << stdout.read
+  #    24 +       @cmd_output << stderr.read
+  #    25 +       @cmd_status = wait_thr.value.exitstatus
+  #    26 +     end
+  #    27 +
+  #    28 +     return @cmd_output, @cmd_status
+  #    29 +   end
+  #    30 + end
+  #
+  # new diff:
+  #     1 + require 'fileutils'
+  #     2 + require 'open3'
+  #     3 +
+  #     4 + module Popen
+  #     5 +   extend self
+  #     6 +
+  #     7 +   def popen(cmd, path=nil)
+  #     8 +     unless cmd.is_a?(Array)
+  #     9 +       raise RuntimeError, "System commands must be given as an array of strings"
+  #    10 +     end
+  #    11 +
+  #    12 +     path ||= Dir.pwd
+  #    13 +
+  #    14 +     vars = {
+  #    15 +       "PWD" => path
+  #    16 +     }
+  #    17 +
+  #    18 +     options = {
+  #    19 +       chdir: path
+  #    20 +     }
+  #    21 +
+  #    22 +     unless File.directory?(path)
+  #    23 +       FileUtils.mkdir_p(path)
+  #    24 +     end
+  #    25 +
+  #    26 +     @cmd_output = ""
+  #    27 +     @cmd_status = 0
+  #    28 +
+  #    29 +     Open3.popen3(vars, *cmd, options) do |stdin, stdout, stderr, wait_thr|
+  #    30 +       @cmd_output << stdout.read
+  #    31 +       @cmd_output << stderr.read
+  #    32 +       @cmd_status = wait_thr.value.exitstatus
+  #    33 +     end
+  #    34 +
+  #    35 +     return @cmd_output, @cmd_status
+  #    36 +   end
+  #    37 + end
+  #
+  # old->new diff:
+  # .. .. @@ -6,12 +6,18 @@ module Popen
+  #  6  6
+  #  7  7    def popen(cmd, path=nil)
+  #  8  8      unless cmd.is_a?(Array)
+  #  9    -      raise "System commands must be given as an array of strings"
+  #     9 +      raise RuntimeError, "System commands must be given as an array of strings"
+  # 10 10      end
+  # 11 11
+  # 12 12      path ||= Dir.pwd
+  # 13    -    vars = { "PWD" => path }
+  # 14    -    options = { chdir: path }
+  #    13 +
+  #    14 +    vars = {
+  #    15 +      "PWD" => path
+  #    16 +    }
+  #    17 +
+  #    18 +    options = {
+  #    19 +      chdir: path
+  #    20 +    }
+  # 15 21
+  # 16 22      unless File.directory?(path)
+  # 17 23        FileUtils.mkdir_p(path)
+  # 18 24      end
+  # 19 25
+  # 20 26      @cmd_output = ""
+  # 21 27      @cmd_status = 0
+  #    28 +
+  # 22 29      Open3.popen3(vars, *cmd, options) do |stdin, stdout, stderr, wait_thr|
+  # 23 30        @cmd_output << stdout.read
+  # 24 31        @cmd_output << stderr.read
+  # .. ..
+
+  describe "#execute" do
+    let(:note) { create(:diff_note_on_merge_request, project: project, position: old_position) }
+
+    let(:old_position) do
+      Gitlab::Diff::Position.new(
+        old_path: path,
+        new_path: path,
+        old_line: nil,
+        new_line: line,
+        diff_refs: old_diff_refs
+      )
+    end
+
+    context "when the diff line is the same" do
+      let(:line) { 16 }
+
+      it "updates the position" do
+        subject.execute(note)
+
+        expect(note.original_position).to eq(old_position)
+        expect(note.position).not_to eq(old_position)
+        expect(note.position.new_line).to eq(22)
+      end
+    end
+
+    context "when the diff line has changed" do
+      let(:line) { 9 }
+
+      it "doesn't update the position" do
+        subject.execute(note)
+
+        expect(note.original_position).to eq(old_position)
+        expect(note.position).to eq(old_position)
+      end
+    end
+  end
+end