update tests

lib/foreman/cli.rb

@@ -32,8 +32,6 @@ class Foreman::CLI < Thor
     config = Foreman::Configuration.new(app)
     error "No such process: #{process}." unless config.processes[process]
     config.scale(process, amount)
-  rescue Foreman::AppDoesNotExist
-    error "No such app: #{app}."
   end
 
 private ######################################################################

lib/foreman/configuration.rb

@@ -17,9 +17,9 @@ class Foreman::Configuration
     amount = amount.to_i
 
     if (old_amount < amount)
-      ((old_amount + 1) .. amount).each { |num| run "start #{app}-#{process} NUM=#{num}" }
+      ((old_amount + 1) .. amount).each { |num| system "start #{app}-#{process} NUM=#{num}" }
     elsif (amount < old_amount)
-      ((amount + 1) .. old_amount).each { |num| run "stop #{app}-#{process} NUM=#{num}" }
+      ((amount + 1) .. old_amount).each { |num| system "stop #{app}-#{process} NUM=#{num}" }
     end
 
     write
@@ -27,8 +27,8 @@ class Foreman::Configuration
 
   def write
     write_file "/etc/foreman/#{app}.conf", <<-UPSTART_CONFIG
-#{app}_processes="#{processes.keys.join(' ')}"
-#{processes.keys.map { |k| "#{app}_#{k}=\"#{processes[k]}\"" }.join("\n")}
+#{app}_processes="#{processes.keys.sort.join(' ')}"
+#{processes.keys.sort.map { |k| "#{app}_#{k}=\"#{processes[k]}\"" }.join("\n")}
     UPSTART_CONFIG
   end
 
@@ -46,10 +46,6 @@ private ######################################################################
   rescue Errno::ENOENT
   end
 
-  def run(command)
-    system command
-  end
-
   def write_file(filename, contents)
     File.open(filename, "w") do |file|
       file.puts contents

lib/foreman/engine.rb

@@ -31,12 +31,7 @@ class Foreman::Engine
     trap("TERM") { kill_and_exit("TERM") }
     trap("INT")  { kill_and_exit("INT")  }
 
-    while true
-      pid, status = Process.wait2
-      process = running_processes.delete(pid)
-      info "exited with code #{status}", process
-      fork process
-    end
+    run_loop
   end
 
 private ######################################################################
@@ -76,16 +71,25 @@ private ######################################################################
     end
   end
 
+  def proctitle(title)
+    $0 = title
+  end
+
   def read_procfile(procfile)
     File.read(procfile)
   end
 
+  def run_loop
+    while true
+      pid, status = Process.wait2
+      process = running_processes.delete(pid)
+      info "exited with code #{status}", process
+      fork process
+    end
+  end
+
   def running_processes
     @running_processes ||= {}
   end
 
-  def proctitle(title)
-    $0 = title
-  end
-
 end

spec/foreman/cli_spec.rb

@@ -62,7 +62,7 @@ describe "Foreman::CLI" do
   describe "scale" do
     describe "without an existing configuration" do
       it "displays an error" do
-        mock_error(subject, "No such app: testapp.") do
+        mock_error(subject, "No such process: alpha.") do
           subject.scale("testapp", "alpha", "2")
         end
       end

spec/foreman/configuration_spec.rb

@@ -1,2 +1,49 @@
 require "spec_helper"
 require "foreman/configuration"
+
+describe "Foreman::Configuration" do
+  subject { Foreman::Configuration.new("testapp") }
+
+  describe "initialize" do
+    describe "without an existing config" do
+      it "has no processes" do
+        subject.processes.length.should == 0
+      end
+    end
+
+    describe "with an existing config" do
+      it "has processes" do
+        write_foreman_config("testapp")
+        subject.processes["alpha"].should == 1
+        subject.processes["bravo"].should == 2
+      end
+    end
+  end
+
+  describe "scale" do
+    before(:each) { write_foreman_config("testapp") }
+
+    it "can scale up" do
+      mock(subject).system("start testapp-alpha NUM=2")
+      mock(subject).system("start testapp-alpha NUM=3")
+      subject.scale("alpha", 3)
+    end
+
+    it "can scale down" do
+      mock(subject).system("stop testapp-bravo NUM=2")
+      subject.scale("bravo", 1)
+    end
+  end
+  
+  describe "wite" do
+    it "can write a configuration file" do
+      subject.scale("charlie", 3)
+      subject.scale("delta", 4)
+      File.read("/etc/foreman/testapp.conf").should == <<-FOREMAN_CONFIG
+testapp_processes="charlie delta"
+testapp_charlie="3"
+testapp_delta="4"
+      FOREMAN_CONFIG
+    end
+  end
+end

spec/foreman/engine_spec.rb

@@ -1,2 +1,32 @@
 require "spec_helper"
 require "foreman/engine"
+
+describe "Foreman::Engine" do
+  subject { Foreman::Engine.new("Procfile") }
+
+  describe "initialize" do
+    describe "without an existing Procfile" do
+      it "raises an error" do
+        lambda { subject }.should raise_error
+      end
+    end
+    
+    describe "with a Procfile" do
+      it "reads the processes" do
+        write_procfile
+        subject.processes["alpha"].command.should == "./alpha"
+        subject.processes["bravo"].command.should == "./bravo"
+      end
+    end
+  end
+  
+  describe "start" do
+    it "forks the processes" do
+      write_procfile
+      mock(subject).fork(subject.processes["alpha"])
+      mock(subject).fork(subject.processes["bravo"])
+      mock(subject).run_loop
+      subject.start
+    end
+  end
+end