Add Naming/AccessorMethodName rule

spec/ameba/rule/naming/accessor_method_name_spec.cr

@@ -0,0 +1,93 @@
+require "../../../spec_helper"
+
+module Ameba::Rule::Naming
+  subject = AccessorMethodName.new
+
+  describe AccessorMethodName do
+    it "passes if accessor method name is correct" do
+      expect_no_issues subject, <<-CRYSTAL
+        class Foo
+          def self.instance
+          end
+
+          def self.instance=(value)
+          end
+
+          def user
+          end
+
+          def user=(user)
+          end
+        end
+        CRYSTAL
+    end
+
+    it "passes if accessor method is defined in top-level scope" do
+      expect_no_issues subject, <<-CRYSTAL
+        def get_user
+        end
+
+        def set_user(user)
+        end
+        CRYSTAL
+    end
+
+    it "fails if accessor method is defined with receiver in top-level scope" do
+      expect_issue subject, <<-CRYSTAL
+        def Foo.get_user
+              # ^^^^^^^^ error: Favour method name 'user' over 'get_user'
+        end
+
+        def Foo.set_user(user)
+              # ^^^^^^^^ error: Favour method name 'user=' over 'set_user'
+        end
+        CRYSTAL
+    end
+
+    it "fails if accessor method name is wrong" do
+      expect_issue subject, <<-CRYSTAL
+        class Foo
+          def self.get_instance
+                 # ^^^^^^^^^^^^ error: Favour method name 'instance' over 'get_instance'
+          end
+
+          def self.set_instance(value)
+                 # ^^^^^^^^^^^^ error: Favour method name 'instance=' over 'set_instance'
+          end
+
+          def get_user
+            # ^^^^^^^^ error: Favour method name 'user' over 'get_user'
+          end
+
+          def set_user(user)
+            # ^^^^^^^^ error: Favour method name 'user=' over 'set_user'
+          end
+        end
+        CRYSTAL
+    end
+
+    it "ignores if alternative name isn't valid syntax" do
+      expect_no_issues subject, <<-CRYSTAL
+        class Foo
+          def get_404
+          end
+
+          def set_404(value)
+          end
+        end
+        CRYSTAL
+    end
+
+    it "ignores if the method has unexpected arity" do
+      expect_no_issues subject, <<-CRYSTAL
+        class Foo
+          def get_user(type)
+          end
+
+          def set_user(user, type)
+          end
+        end
+        CRYSTAL
+    end
+  end
+end