Use validation matchers for DisallowedHashtagValidator spec (#37636)

spec/validators/disallowed_hashtags_validator_spec.rb

@@ -3,46 +3,47 @@
 require 'rails_helper'
 
 RSpec.describe DisallowedHashtagsValidator do
-  let(:disallowed_tags) { [] }
+  subject { Fabricate.build :status }
 
-  describe '#validate' do
-    before do
-      disallowed_tags.each { |name| Fabricate(:tag, name: name, usable: false) }
-      described_class.new.validate(status)
+  let(:tag_string) { 'ok #a #b #c then' }
+
+  context 'when local' do
+    before { subject.local = true }
+
+    context 'when reblog? is true' do
+      before { subject.reblog = Fabricate(:status) }
+
+      it { is_expected.to allow_values(nil, tag_string).for(:text) }
     end
 
-    let(:status) { instance_double(Status, errors: errors, local?: local, reblog?: reblog, text: disallowed_tags.map { |x| "##{x}" }.join(' ')) }
-    let(:errors) { instance_double(ActiveModel::Errors, add: nil) }
+    context 'when reblog? is false' do
+      context 'when text does not contain unusable tags' do
+        it { is_expected.to allow_values('text', tag_string).for(:text) }
+      end
 
-    context 'with a remote reblog' do
-      let(:local)  { false }
-      let(:reblog) { true }
+      context 'when text contains unusable tags' do
+        before { Fabricate :tag, name: 'a', usable: false }
 
-      it 'does not add errors' do
-        expect(errors).to_not have_received(:add).with(:text, any_args)
+        it { is_expected.to_not allow_values(tag_string).for(:text).with_message(disallow_message) }
+
+        def disallow_message
+          I18n.t('statuses.disallowed_hashtags', tags: 'a', count: 1)
+        end
+      end
     end
   end
 
-    context 'with a local original status' do
-      let(:local)  { true }
-      let(:reblog) { false }
+  context 'when remote' do
+    before { subject.local = false }
 
-      context 'when does not contain any disallowed hashtags' do
-        let(:disallowed_tags) { [] }
+    context 'when reblog? is true' do
+      before { subject.reblog = Fabricate(:status) }
 
-        it 'does not add errors' do
-          expect(errors).to_not have_received(:add).with(:text, any_args)
-        end
+      it { is_expected.to allow_values(nil, tag_string).for(:text) }
     end
 
-      context 'when contains disallowed hashtags' do
-        let(:disallowed_tags) { %w(a b c) }
-
-        it 'adds an error' do
-          expect(errors).to have_received(:add)
-            .with(:text, I18n.t('statuses.disallowed_hashtags', tags: disallowed_tags.join(', '), count: disallowed_tags.size))
-        end
-      end
+    context 'when reblog? is false' do
+      it { is_expected.to allow_values('text', tag_string).for(:text) }
     end
   end
 end