Refactor TODOFormatter spec

spec/ameba/formatter/todo_formatter_spec.cr

@@ -2,43 +2,52 @@ require "../../spec_helper"
 require "file_utils"
 
 module Ameba
+  private def with_formatter
+    io = IO::Memory.new
+    formatter = Formatter::TODOFormatter.new(io)
+
+    yield formatter, io
+  end
+
   private def create_todo
-    formatter = Formatter::TODOFormatter.new IO::Memory.new
+    with_formatter do |formatter|
       s = Source.new "a = 1", "source.cr"
       s.add_issue DummyRule.new, {1, 2}, "message"
       file = formatter.finished([s])
       file ? File.read(file.path) : ""
     end
+  end
 
   describe Formatter::TODOFormatter do
     ::Spec.after_each do
-      FileUtils.rm(Ameba::Config::PATH) if File.exists?(Ameba::Config::PATH)
+      FileUtils.rm_rf(Ameba::Config::PATH)
     end
 
     context "problems not found" do
       it "does not create file" do
-        formatter = Formatter::TODOFormatter.new IO::Memory.new
+        with_formatter do |formatter|
           file = formatter.finished [Source.new ""]
           file.should be_nil
         end
+      end
 
       it "reports a message saying file is not created" do
-        io = IO::Memory.new
+        with_formatter do |formatter, io|
-        formatter = Formatter::TODOFormatter.new io
           formatter.finished [Source.new ""]
           io.to_s.should contain "No issues found. File is not generated"
         end
       end
+    end
 
     context "problems found" do
       it "prints a message saying file is created" do
-        io = IO::Memory.new
+        with_formatter do |formatter, io|
-        formatter = Formatter::TODOFormatter.new io
           s = Source.new "a = 1", "source.cr"
           s.add_issue DummyRule.new, {1, 2}, "message"
           formatter.finished([s])
           io.to_s.should contain "Created .ameba.yml"
         end
+      end
 
       it "creates a valid YAML document" do
         YAML.parse(create_todo).should_not be_nil
@@ -77,8 +86,8 @@ module Ameba
       end
 
       context "with multiple issues" do
-        formatter = Formatter::TODOFormatter.new IO::Memory.new
+        it "does generate todo file" do
-
+          with_formatter do |formatter|
             s1 = Source.new "a = 1", "source1.cr"
             s2 = Source.new "a = 1", "source2.cr"
             s1.add_issue DummyRule.new, {1, 2}, "message1"
@@ -100,20 +109,22 @@ module Ameba
                 Severity: Convention
               CONTENT
           end
+        end
+      end
 
       context "when invalid syntax" do
         it "does generate todo file" do
-          formatter = Formatter::TODOFormatter.new IO::Memory.new
+          with_formatter do |formatter|
             s = Source.new "def invalid_syntax"
             s.add_issue Rule::Lint::Syntax.new, {1, 2}, "message"
 
             file = formatter.finished [s]
             file.should be_nil
           end
+        end
 
         it "prints an error message" do
-          io = IO::Memory.new
+          with_formatter do |formatter, io|
-          formatter = Formatter::TODOFormatter.new io
             s = Source.new "def invalid_syntax"
             s.add_issue Rule::Lint::Syntax.new, {1, 2}, "message"
 
@@ -125,3 +136,4 @@ module Ameba
       end
     end
   end
+end

spec/spec_helper.cr

@@ -74,14 +74,14 @@ module Ameba
 
   # A rule that always raises an error
   class RaiseRule < Rule::Base
-    property should_raise = false
+    property? should_raise = false
 
     properties do
       description "Internal rule that always raises"
     end
 
     def test(source)
-      should_raise && raise "something went wrong"
+      should_raise? && raise "something went wrong"
     end
   end