Merge pull request #4625 from DomT4/please_stop_evading_the_audit

class_cop: tighten test audit

Library/Homebrew/rubocops/class_cop.rb

@@ -25,13 +25,24 @@ module RuboCop
     end
 
     module FormulaAuditStrict
-      # - `test do ..end` should be defined in the formula
+      # - `test do ..end` should be meaningfully defined in the formula
       class Test < FormulaCop
-        MSG = "A `test do` test block should be added".freeze
-
         def audit_formula(_node, _class_node, _parent_class_node, body_node)
-          return if find_block(body_node, :test)
+          test = find_block(body_node, :test)
-          problem MSG
+
+          unless test
+            problem "A `test do` test block should be added"
+            return
+          end
+
+          if test.body.nil?
+            problem "`test do` should not be empty"
+            return
+          end
+
+          return unless test.body.single_line? &&
+                        test.body.source.to_s == "true"
+          problem "`test do` should contain a real test"
         end
       end
     end

Library/Homebrew/test/rubocops/class_cop_spec.rb

@@ -59,4 +59,29 @@ describe RuboCop::Cop::FormulaAuditStrict::Test do
       end
     RUBY
   end
+
+  it "reports an offense when there is an empty test block" do
+    expect_offense(<<~RUBY)
+      class Foo < Formula
+        url 'https://example.com/foo-1.0.tgz'
+
+        test do
+        ^^^^^^^ `test do` should not be empty
+        end
+      end
+    RUBY
+  end
+
+  it "reports an offense when test is falsely true" do
+    expect_offense(<<~RUBY)
+      class Foo < Formula
+        url 'https://example.com/foo-1.0.tgz'
+
+        test do
+        ^^^^^^^ `test do` should contain a real test
+          true
+        end
+      end
+    RUBY
+  end
 end