Complete cat command

lib/packages/cat.rb

@@ -3,8 +3,10 @@
 class Cat
   def self.main params
     # read the file whose name has been passed as the parameter, line-by-line
-    File.foreach(params[0]) do |line|
-      puts line
+    params.each do |p|
+      File.foreach(p) do |line|
+        puts line
+      end
     end
 
     rescue

spec/packages/cat_spec.rb

@@ -17,5 +17,15 @@
       end
     end
 
+    context "given multiple existing files" do
+      it "prints the text in the file" do
+        File.write("first.txt", "Hello World!")
+        File.write("second.txt", "Goodbye World!")
+        expect(Cat.main("first.txt", "second.txt")).to eql(puts `cat first.txt second.txt`)
+        `rm first.txt`
+        `rm second.txt`
+      end
+    end
+
   end
 end