Add application id suffix command

lib/replicant/commands.rb

@@ -8,3 +8,4 @@
 require_relative "commands/package_command"
 require_relative "commands/reset_command"
 require_relative "commands/restart_command"
+require_relative "commands/suffix_command"

lib/replicant/commands/suffix_command.rb

@@ -0,0 +1,19 @@
+class SuffixCommand < Command
+
+  def description
+    "set an application id suffix"
+  end
+
+  def usage
+    "#{name} .development"
+  end
+
+  def valid_args?
+    args.present? && /^\.\w+(\.\w+)*$/ =~ args
+  end
+
+  def run
+    output "Setting application id suffix to \"#{@repl.default_package+args}\""
+    @repl.default_package += args
+  end
+end

test/commands/suffix_command_spec.rb

@@ -0,0 +1,39 @@
+require 'helper'
+
+class SuffixCommandSpec < CommandSpecBase
+
+  describe "with valid arguments" do
+    it "accepts a suffix with one element" do
+      @repl.default_package = 'myapp'
+      command = silent SuffixCommand.new(@repl, ".debug")
+      command.execute
+      @repl.default_package.must_equal "myapp.debug"
+    end
+
+    it "accepts a package with two elements" do
+      @repl.default_package = 'myapp'
+      command = silent SuffixCommand.new(@repl, ".debug.me")
+      command.execute
+      @repl.default_package.must_equal "myapp.debug.me"
+    end
+  end
+
+  describe "with invalid arguments" do
+    it "refuses a suffix not starting with a dot" do
+      @repl.default_package = 'myapp'
+      command = silent SuffixCommand.new(@repl, 'debug')
+      command.expects(:run).never
+      command.execute
+      @repl.default_package.must_equal 'myapp'
+    end
+
+    it "refuses a suffix containing non-alphanumeric characters" do
+      @repl.default_package = 'myapp'
+      command = silent PackageCommand.new(@repl, ".myapp.some$thing")
+      command.expects(:run).never
+      command.execute
+      @repl.default_package.must_equal 'myapp'
+    end
+  end
+end
+