FEATURE: support regex in rake post:remap (#5201)

spec/tasks/posts_spec.rb

@@ -1,18 +1,46 @@
 require 'rails_helper'
+require 'highline/import'
+require 'highline/simulate'
 
 RSpec.describe "Post rake tasks" do
   before do
+    Rake::Task.clear
     Discourse::Application.load_tasks
     IO.any_instance.stubs(:puts)
   end
 
   describe 'remap' do
+    let!(:tricky_post) { Fabricate(:post, raw: 'Today ^Today') }
+
     it 'should remap posts' do
       post = Fabricate(:post, raw: "The quick brown fox jumps over the lazy dog")
 
-      Rake::Task['posts:remap'].invoke("brown", "red")
+      HighLine::Simulate.with('y') do
+        Rake::Task['posts:remap'].invoke("brown", "red")
+      end
+
       post.reload
       expect(post.raw).to eq('The quick red fox jumps over the lazy dog')
     end
+
+    context 'when type == string' do
+      it 'remaps input as string' do
+        HighLine::Simulate.with('y') do
+          Rake::Task['posts:remap'].invoke('^Today', 'Yesterday', 'string')
+        end
+
+        expect(tricky_post.reload.raw).to eq('Today Yesterday')
+      end
+    end
+
+    context 'when type == regex' do
+      it 'remaps input as regex' do
+        HighLine::Simulate.with('y') do
+          Rake::Task['posts:remap'].invoke('^Today', 'Yesterday', 'regex')
+        end
+
+        expect(tricky_post.reload.raw).to eq('Yesterday ^Today')
+      end
+    end
   end
 end