6 files changed, 146 insertions, 4 deletions
diff --git a/spec/controllers/api/v1/followed_tags_controller_spec.rb b/spec/controllers/api/v1/followed_tags_controller_spec.rb
new file mode 100644
index 000000000..2191350ef
--- /dev/null
+++ b/spec/controllers/api/v1/followed_tags_controller_spec.rb
@@ -0,0 +1,23 @@
+require 'rails_helper'
+
+RSpec.describe Api::V1::FollowedTagsController, type: :controller do
+  render_views
+
+  let(:user)   { Fabricate(:user) }
+  let(:scopes) { 'read:follows' }
+  let(:token)  { Fabricate(:accessible_access_token, resource_owner_id: user.id, scopes: scopes) }
+
+  before { allow(controller).to receive(:doorkeeper_token) { token } }
+
+  describe 'GET #index' do
+    let!(:tag_follows) { Fabricate.times(5, :tag_follow, account: user.account) }
+
+    before do
+      get :index, params: { limit: 1 }
+    end
+
+    it 'returns http success' do
+      expect(response).to have_http_status(:success)
+    end
+  end
+end
diff --git a/spec/controllers/api/v1/tags_controller_spec.rb b/spec/controllers/api/v1/tags_controller_spec.rb
new file mode 100644
index 000000000..ac42660df
--- /dev/null
+++ b/spec/controllers/api/v1/tags_controller_spec.rb
@@ -0,0 +1,82 @@
+require 'rails_helper'
+
+RSpec.describe Api::V1::TagsController, type: :controller do
+  render_views
+
+  let(:user)   { Fabricate(:user) }
+  let(:scopes) { 'write:follows' }
+  let(:token)  { Fabricate(:accessible_access_token, resource_owner_id: user.id, scopes: scopes) }
+
+  before { allow(controller).to receive(:doorkeeper_token) { token } }
+
+  describe 'GET #show' do
+    before do
+      get :show, params: { id: name }
+    end
+
+    context 'with existing tag' do
+      let!(:tag) { Fabricate(:tag) }
+      let(:name) { tag.name }
+
+      it 'returns http success' do
+        expect(response).to have_http_status(:success)
+      end
+    end
+
+    context 'with non-existing tag' do
+      let(:name) { 'hoge' }
+
+      it 'returns http success' do
+        expect(response).to have_http_status(:success)
+      end
+    end
+  end
+
+  describe 'POST #follow' do
+    before do
+      post :follow, params: { id: name }
+    end
+
+    context 'with existing tag' do
+      let!(:tag) { Fabricate(:tag) }
+      let(:name) { tag.name }
+
+      it 'returns http success' do
+        expect(response).to have_http_status(:success)
+      end
+
+      it 'creates follow' do
+        expect(TagFollow.where(tag: tag, account: user.account).exists?).to be true
+      end
+    end
+
+    context 'with non-existing tag' do
+      let(:name) { 'hoge' }
+
+      it 'returns http success' do
+        expect(response).to have_http_status(:success)
+      end
+
+      it 'creates follow' do
+        expect(TagFollow.where(tag: Tag.find_by!(name: name), account: user.account).exists?).to be true
+      end
+    end
+  end
+
+  describe 'POST #unfollow' do
+    let!(:tag) { Fabricate(:tag, name: 'foo') }
+    let!(:tag_follow) { Fabricate(:tag_follow, account: user.account, tag: tag) }
+
+    before do
+      post :unfollow, params: { id: tag.name }
+    end
+
+    it 'returns http success' do
+      expect(response).to have_http_status(:success)
+    end
+
+    it 'removes the follow' do
+      expect(TagFollow.where(tag: tag, account: user.account).exists?).to be false
+    end
+  end
+end
diff --git a/spec/fabricators/tag_follow_fabricator.rb b/spec/fabricators/tag_follow_fabricator.rb
new file mode 100644
index 000000000..a2cccb07a
--- /dev/null
+++ b/spec/fabricators/tag_follow_fabricator.rb
@@ -0,0 +1,4 @@
+Fabricator(:tag_follow) do
+  tag
+  account
+end
diff --git a/spec/lib/hashtag_normalizer_spec.rb b/spec/lib/hashtag_normalizer_spec.rb
new file mode 100644
index 000000000..fbb9f37c0
--- /dev/null
+++ b/spec/lib/hashtag_normalizer_spec.rb
@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe HashtagNormalizer do
+  subject { described_class.new }
+
+  describe '#normalize' do
+    it 'converts full-width Latin characters into basic Latin characters' do
+      expect(subject.normalize('Ｓｙｎｔｈｗａｖｅ')).to eq 'synthwave'
+    end
+
+    it 'converts half-width Katakana into Kana characters' do
+      expect(subject.normalize('ｼｰｻｲﾄﾞﾗｲﾅｰ')).to eq 'シーサイドライナー'
+    end
+
+    it 'converts modified Latin characters into basic Latin characters' do
+      expect(subject.normalize('BLÅHAJ')).to eq 'blahaj'
+    end
+
+    it 'strips out invalid characters' do
+      expect(subject.normalize('#foo')).to eq 'foo'
+    end
+
+    it 'keeps valid characters' do
+      expect(subject.normalize('a·b')).to eq 'a·b'
+    end
+  end
+end
diff --git a/spec/models/tag_follow_spec.rb b/spec/models/tag_follow_spec.rb
new file mode 100644
index 000000000..50c04d2e4
--- /dev/null
+++ b/spec/models/tag_follow_spec.rb
@@ -0,0 +1,4 @@
+require 'rails_helper'
+
+RSpec.describe TagFollow, type: :model do
+end
diff --git a/spec/models/tag_spec.rb b/spec/models/tag_spec.rb
index 3949dbce5..b16f99a79 100644
--- a/spec/models/tag_spec.rb
+++ b/spec/models/tag_spec.rb
@@ -91,7 +91,7 @@ RSpec.describe Tag, type: :model do
       upcase_string   = 'abcABCａｂｃＡＢＣやゆよ'
       downcase_string = 'abcabcａｂｃａｂｃやゆよ';
 
-      tag = Fabricate(:tag, name: downcase_string)
+      tag = Fabricate(:tag, name: HashtagNormalizer.new.normalize(downcase_string))
       expect(Tag.find_normalized(upcase_string)).to eq tag
     end
   end
@@ -101,12 +101,12 @@ RSpec.describe Tag, type: :model do
       upcase_string   = 'abcABCａｂｃＡＢＣやゆよ'
       downcase_string = 'abcabcａｂｃａｂｃやゆよ';
 
-      tag = Fabricate(:tag, name: downcase_string)
+      tag = Fabricate(:tag, name: HashtagNormalizer.new.normalize(downcase_string))
       expect(Tag.matches_name(upcase_string)).to eq [tag]
     end
 
     it 'uses the LIKE operator' do
-      expect(Tag.matches_name('100%abc').to_sql).to eq %q[SELECT "tags".* FROM "tags" WHERE LOWER("tags"."name") LIKE LOWER('100\\%abc%')]
+      expect(Tag.matches_name('100%abc').to_sql).to eq %q[SELECT "tags".* FROM "tags" WHERE LOWER("tags"."name") LIKE LOWER('100abc%')]
     end
   end
 
@@ -115,7 +115,7 @@ RSpec.describe Tag, type: :model do
       upcase_string   = 'abcABCａｂｃＡＢＣやゆよ'
       downcase_string = 'abcabcａｂｃａｂｃやゆよ';
 
-      tag = Fabricate(:tag, name: downcase_string)
+      tag = Fabricate(:tag, name: HashtagNormalizer.new.normalize(downcase_string))
       expect(Tag.matching_name(upcase_string)).to eq [tag]
     end
   end