TODO formatter

spec/ameba/formatter/todo_formatter_spec.cr

@@ -0,0 +1,44 @@
+require "../../spec_helper"
+
+module Ameba
+  private def create_todo(formatter)
+    s = Source.new "a = 1"
+    s.error DummyRule.new, s.location(1, 2), "message"
+    formatter.finished [s]
+  end
+
+  describe Formatter::TODOFormatter do
+    file = IO::Memory.new
+    subject = Formatter::TODOFormatter.new IO::Memory.new, file
+
+    context "problems not reported" do
+      it "does not create todo" do
+        subject.finished [Source.new ""]
+        file.to_s.empty?.should be_true
+      end
+    end
+
+    context "problems reported" do
+      it "creates a todo with header" do
+        create_todo subject
+        file.to_s.should contain "# This configuration file was generated by"
+        file.to_s.should contain "Ameba version #{VERSION}"
+      end
+
+      it "creates a todo with rule name" do
+        create_todo subject
+        file.to_s.should contain "DummyRule"
+      end
+
+      it "creates a todo with problems count" do
+        create_todo subject
+        file.to_s.should contain "Problems found: 1"
+      end
+
+      it "creates a valid YAML document" do
+        create_todo subject
+        YAML.parse(file.to_s).should_not be_nil
+      end
+    end
+  end
+end