use lazy ajax filter dropdown for runner tags

the potential number of available runner tags is too large to load it
statically to a dropdown. we use the same lazy loaded dropdown as is
used for the users dropdown already.

1 files changed, 66 insertions, 0 deletions

diff --git a/spec/finders/autocomplete/acts_as_taggable_on/tags_finder_spec.rb b/spec/finders/autocomplete/acts_as_taggable_on/tags_finder_spec.rb
new file mode 100644
index 00000000000..9d1fac20362
--- /dev/null
+++ b/spec/finders/autocomplete/acts_as_taggable_on/tags_finder_spec.rb
@@ -0,0 +1,66 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Autocomplete::ActsAsTaggableOn::TagsFinder do
+  describe '#execute' do
+    context 'with empty params' do
+      it 'returns all tags' do
+        create :ci_runner, tag_list: ['tag1']
+        create :ci_runner, tag_list: ['tag2']
+
+        tags = described_class.new(taggable_type: Ci::Runner, params: {}).execute.map(&:name)
+
+        expect(tags).to match_array %w(tag1 tag2)
+      end
+    end
+
+    context 'filter by search' do
+      context 'with an empty search term' do
+        it 'returns an empty collection' do
+          create :ci_runner, tag_list: ['tag1']
+          create :ci_runner, tag_list: ['tag2']
+
+          tags = described_class.new(taggable_type: Ci::Runner, params: { search: '' }).execute.map(&:name)
+
+          expect(tags).to be_empty
+        end
+      end
+
+      context 'with a search containing 2 characters' do
+        it 'returns the tag that strictly matches the search term' do
+          create :ci_runner, tag_list: ['t1']
+          create :ci_runner, tag_list: ['t11']
+
+          tags = described_class.new(taggable_type: Ci::Runner, params: { search: 't1' }).execute.map(&:name)
+
+          expect(tags).to match_array ['t1']
+        end
+      end
+
+      context 'with a search containing 3 characters' do
+        it 'returns the tag that partially matches the search term' do
+          create :ci_runner, tag_list: ['tag1']
+          create :ci_runner, tag_list: ['tag11']
+
+          tags = described_class.new(taggable_type: Ci::Runner, params: { search: 'ag1' }).execute.map(&:name)
+
+          expect(tags).to match_array %w(tag1 tag11)
+        end
+      end
+    end
+
+    context 'limit' do
+      it 'limits the result set by the limit constant' do
+        stub_const("#{described_class}::LIMIT", 1)
+
+        create :ci_runner, tag_list: ['tag1']
+        create :ci_runner, tag_list: ['tag2']
+
+        tags = described_class.new(taggable_type: Ci::Runner, params: { search: 'tag' }).execute
+
+        expect(tags.count).to eq 1
+      end
+    end
+  end
+end