Add presenter specs

spec/ameba/presenter/rule_collection_presenter_spec.cr

@@ -0,0 +1,32 @@
+require "../../spec_helper"
+
+module Ameba
+  private def with_rule_collection_presenter(&)
+    with_presenter(Presenter::RuleCollectionPresenter) do |presenter, io|
+      rules = Config.load.rules
+      presenter.run(rules)
+
+      output = io.to_s
+      output = Formatter::Util.deansify(output).to_s
+
+      yield rules, output, presenter
+    end
+  end
+
+  describe Presenter::RuleCollectionPresenter do
+    it "outputs rule collection details" do
+      with_rule_collection_presenter do |rules, output|
+        rules.each do |rule|
+          output.should contain rule.name
+          output.should contain rule.severity.symbol
+
+          if description = rule.description
+            output.should contain description
+          end
+        end
+        output.should contain "Total rules: #{rules.size}"
+        output.should match /\d+ enabled/
+      end
+    end
+  end
+end

spec/ameba/presenter/rule_presenter_spec.cr

@@ -0,0 +1,30 @@
+require "../../spec_helper"
+
+module Ameba
+  private def rule_presenter_each_rule(&)
+    with_presenter(Presenter::RulePresenter) do |presenter, io|
+      rules = Config.load.rules
+      rules.each do |rule|
+        presenter.run(rule)
+
+        output = io.to_s
+        output = Formatter::Util.deansify(output).to_s
+
+        yield rule, output, presenter
+      end
+    end
+  end
+
+  describe Presenter::RulePresenter do
+    it "outputs rule details" do
+      rule_presenter_each_rule do |rule, output|
+        output.should contain rule.name
+        output.should contain rule.severity.to_s
+
+        if description = rule.description
+          output.should contain description
+        end
+      end
+    end
+  end
+end

spec/spec_helper.cr

@@ -282,6 +282,13 @@ module Ameba
   end
 end
 
+def with_presenter(klass, &)
+  io = IO::Memory.new
+  presenter = klass.new(io)
+
+  yield presenter, io
+end
+
 def as_node(source)
   Crystal::Parser.new(source).parse
 end