Fix bugs in Gitlab::Template::Finders preventing instances from BaseTemplate.all from loading content

lib/gitlab/template/finders/base_template_finder.rb

@@ -21,7 +21,7 @@ module Gitlab
         def category_directory(category)
           return @base_dir unless category.present?
 
-          @base_dir + @categories[category]
+          File.join(@base_dir, @categories[category])
         end
 
         class << self

lib/gitlab/template/finders/repo_template_finder.rb

@@ -27,7 +27,7 @@ module Gitlab
           directory = select_directory(file_name)
           raise FileNotFoundError if directory.nil?
 
-          category_directory(directory) + file_name
+          File.join(category_directory(directory), file_name)
         end
 
         def list_files_for(dir)
@@ -37,8 +37,8 @@ module Gitlab
 
           entries = @repository.tree(:head, dir).entries
 
-          names = entries.map(&:name)
-          names.select { |f| f =~ self.class.filter_regex(@extension) }
+          paths = entries.map(&:path)
+          paths.select { |f| f =~ self.class.filter_regex(@extension) }
         end
 
         private
@@ -47,10 +47,10 @@ module Gitlab
           return [] unless @commit
 
           # Insert root as directory
-          directories = ["", @categories.keys]
+          directories = ["", *@categories.keys]
 
           directories.find do |category|
-            path = category_directory(category) + file_name
+            path = File.join(category_directory(category), file_name)
             @repository.blob_at(@commit.id, path)
           end
         end

spec/lib/gitlab/template/finders/repo_template_finders_spec.rb

@@ -0,0 +1,37 @@
+require 'spec_helper'
+
+describe Gitlab::Template::Finders::RepoTemplateFinder do
+  set(:project) { create(:project, :repository) }
+
+  let(:categories) { { 'HTML' => 'html' } }
+
+  subject(:finder) { described_class.new(project, 'files/', '.html', categories) }
+
+  describe '#read' do
+    it 'returns the content of the given path' do
+      result = finder.read('files/html/500.html')
+
+      expect(result).to be_present
+    end
+
+    it 'raises an error if the path does not exist' do
+      expect { finder.read('does/not/exist') }.to raise_error(described_class::FileNotFoundError)
+    end
+  end
+
+  describe '#find' do
+    it 'returns the full path of the found template' do
+      result = finder.find('500')
+
+      expect(result).to eq('files/html/500.html')
+    end
+  end
+
+  describe '#list_files_for' do
+    it 'returns the full path of the found files' do
+      result = finder.list_files_for('files/html')
+
+      expect(result).to contain_exactly('files/html/500.html')
+    end
+  end
+end