Made crystal spec tests run the code

spec/andrew_spec.cr

@@ -1,9 +1,10 @@
 require "./spec_helper"
 
 describe Andrew do
-  # TODO: Write tests
-
-  it "works" do
-    false.should eq(true)
+  it "generate record.yml" do
+	File.open("tests/record.yml") do |file|
+		fg = FileGenerator.from_yaml(file)
+	end
+    true.should eq(true)
   end
 end

src/andrew.cr

@@ -128,6 +128,10 @@ class AttributeAfterGenerator
 	end
 end
 
-File.open(ARGV[0]) do |file|
-	puts FileGenerator.from_yaml(file).to_s
+if(ARGV.size != 0)
+	File.open(ARGV[0]) do |file|
+		puts FileGenerator.from_yaml(file).to_s
+	end
+else
+	puts "Andrew code generator\n\tExpects a single YAML file as argument"
 end