Refactor formatters

spec/ameba/formatter/dot_formatter_spec.cr

@@ -0,0 +1,41 @@
+require "../../spec_helper"
+
+module Ameba::Formatter
+  describe DotFormatter do
+    output = IO::Memory.new
+    subject = DotFormatter.new output
+
+    describe "#started" do
+      it "writes started message" do
+        subject.started [Source.new ""]
+        output.to_s.should eq "Inspecting 1 file.\n\n"
+      end
+    end
+
+    describe "#source_finished" do
+      it "writes valid source" do
+        subject.source_finished Source.new ""
+        output.to_s.should contain "."
+      end
+
+      it "writes invalid source" do
+        s = Source.new ""
+        s.error DummyRule.new, 3, "message"
+        subject.source_finished s
+        output.to_s.should contain "F"
+      end
+    end
+
+    describe "#finished" do
+      it "writes a final message" do
+        subject.finished [Source.new ""]
+        output.to_s.should contain "1 inspected, 0 failures."
+      end
+
+      it "writes the elapsed time" do
+        subject.finished [Source.new ""]
+        output.to_s.should contain "Finished in"
+      end
+    end
+  end
+end