feat: support response assertions

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## Master (Unreleased)
 
 - Add `RSpecRails/HttpStatusNameConsistency` cop. ([@taketo1113])
+- Support correcting `assert_response` assertion in in `RSpec/Rails/MinitestAssertions`. ([@nzlaura])
 
 ## 2.31.0 (2025-03-10)
 
@@ -84,6 +85,7 @@
 [@jojos003]: https://github.com/jojos003
 [@mothonmars]: https://github.com/MothOnMars
 [@mvz]: https://github.com/mvz
+[@nzlaura]: https://github.com/nzlaura
 [@paydaylight]: https://github.com/paydaylight
 [@pirj]: https://github.com/pirj
 [@r7kamura]: https://github.com/r7kamura

docs/modules/ROOT/pages/cops_rspecrails.adoc

@@ -364,6 +364,7 @@ assert_nil a
 refute_empty(b)
 assert_true(a)
 assert_false(a)
+assert_response :ok
 
 # good
 expect(b).to eq(a)
@@ -374,6 +375,7 @@ expect(a).to eq(nil)
 expect(a).not_to be_empty
 expect(a).to be(true)
 expect(a).to be(false)
+expect(response).to have_http_status(:ok)
 ----
 
 [#references-rspecrailsminitestassertions]

lib/rubocop/cop/rspec_rails/minitest_assertions.rb

@@ -18,6 +18,7 @@ module RSpecRails
       #   refute_empty(b)
       #   assert_true(a)
       #   assert_false(a)
+      #   assert_response :ok
       #
       #   # good
       #   expect(b).to eq(a)
@@ -28,6 +29,7 @@ module RSpecRails
       #   expect(a).not_to be_empty
       #   expect(a).to be(true)
       #   expect(a).to be(false)
+      #   expect(response).to have_http_status(:ok)
       #
       class MinitestAssertions < ::RuboCop::Cop::Base
         extend AutoCorrector
@@ -315,6 +317,28 @@ def assertion
           end
         end
 
+        # :nodoc:
+        class ResponseAssertion < BasicAssertion
+          MATCHERS = %i[
+            assert_response
+          ].freeze
+
+          ASSERT_ACTUAL_NODE = Struct.new(:source).new('response')
+
+          # @!method self.minitest_assertion(node)
+          def_node_matcher 'self.minitest_assertion', <<~PATTERN # rubocop:disable InternalAffairs/NodeMatcherDirective
+            (send nil? {:assert_response} $_ $_?)
+          PATTERN
+
+          def self.match(expected, failure_message)
+            new(expected, ASSERT_ACTUAL_NODE, failure_message.first)
+          end
+
+          def assertion
+            "have_http_status(#{expected})"
+          end
+        end
+
         MSG = 'Use `%<prefer>s`.'
 
         # TODO: replace with `BasicAssertion.subclasses` in Ruby 3.1+

spec/rubocop/cop/rspec_rails/minitest_assertions_spec.rb

@@ -947,4 +947,90 @@
       RUBY
     end
   end
+
+  context 'with response assertions' do
+    it 'registers an offense when using `assert_response`' do
+      expect_offense(<<~RUBY)
+        assert_response :redirect
+        ^^^^^^^^^^^^^^^^^^^^^^^^^ Use `expect(response).to have_http_status(:redirect)`.
+      RUBY
+
+      expect_correction(<<~RUBY)
+        expect(response).to have_http_status(:redirect)
+      RUBY
+    end
+
+    it 'registers an offense when using `assert_response` with a number' do
+      expect_offense(<<~RUBY)
+        assert_response 302
+        ^^^^^^^^^^^^^^^^^^^ Use `expect(response).to have_http_status(302)`.
+      RUBY
+
+      expect_correction(<<~RUBY)
+        expect(response).to have_http_status(302)
+      RUBY
+    end
+
+    it 'registers an offense when using `assert_response` with parentheses' do
+      expect_offense(<<~RUBY)
+        assert_response(:success)
+        ^^^^^^^^^^^^^^^^^^^^^^^^^ Use `expect(response).to have_http_status(:success)`.
+      RUBY
+
+      expect_correction(<<~RUBY)
+        expect(response).to have_http_status(:success)
+      RUBY
+    end
+
+    it 'registers an offense when using `assert_response` with ' \
+       'failure message' do
+      expect_offense(<<~RUBY)
+        assert_response :success, "expected success status"
+        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Use `expect(response).to(have_http_status(:success), "expected success status")`.
+      RUBY
+
+      expect_correction(<<~RUBY)
+        expect(response).to(have_http_status(:success), "expected success status")
+      RUBY
+    end
+
+    it 'registers an offense when using `assert_response` with ' \
+       'multi-line arguments' do
+      expect_offense(<<~RUBY)
+        assert_response(:redirect,
+        ^^^^^^^^^^^^^^^^^^^^^^^^^^ Use `expect(response).to(have_http_status(:redirect), "expected redirect status")`.
+                        "expected redirect status")
+      RUBY
+
+      expect_correction(<<~RUBY)
+        expect(response).to(have_http_status(:redirect), "expected redirect status")
+      RUBY
+    end
+
+    it 'registers an offense when using `assert_response` with ' \
+       'numeric status' do
+      expect_offense(<<~RUBY)
+        assert_response 200
+        ^^^^^^^^^^^^^^^^^^^ Use `expect(response).to have_http_status(200)`.
+      RUBY
+
+      expect_correction(<<~RUBY)
+        expect(response).to have_http_status(200)
+      RUBY
+    end
+
+    it 'does not register an offense when using ' \
+       '`expect(response).to have_http_status`' do
+      expect_no_offenses(<<~RUBY)
+        expect(response).to have_http_status(:success)
+      RUBY
+    end
+
+    it 'does not register an offense when using ' \
+       '`expect(response).to have_http_status` with numeric status' do
+      expect_no_offenses(<<~RUBY)
+        expect(response).to have_http_status(200)
+      RUBY
+    end
+  end
 end