Add support for starting procfile in tmux session

spec/foreman/tmux_engine_spec.rb

@@ -0,0 +1,73 @@
+require "spec_helper"
+require "foreman/tmux_engine"
+
+describe "Foreman::TmuxEngine", :fakefs do
+  subject { Foreman::TmuxEngine.new("Procfile", {}) }
+  let(:session) { Time.now.to_i }
+
+  before do
+    any_instance_of(Foreman::TmuxEngine) do |engine|
+      stub(engine).proctitle
+      stub(engine).termtitle
+    end
+    Timecop.freeze(Time.now)
+  end
+
+  after do
+    FileUtils.rm_f("foreman.#{session}.log")
+    Timecop.return
+  end
+
+  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
+      before { write_procfile }
+
+      it "reads the processes" do
+        subject.procfile["alpha"].command.should == "./alpha"
+        subject.procfile["bravo"].command.should == "./bravo"
+      end
+    end
+  end
+
+  describe "start" do
+    before do
+      write_procfile
+      @pid = fork do
+        exec("tmux start-server")
+      end
+    end
+
+    after do
+      Process.waitpid(@pid)
+      %x{tmux kill-session -t #{session} &> /dev/null}
+    end
+
+    it "creates a tmux session and attaches" do
+      %x{tmux has-session -t #{session} &> /dev/null}
+      $?.exitstatus.should == 1
+
+      mock(Kernel).exec("tmux attach-session -t #{session}")
+      subject.start
+
+      %x{tmux has-session -t #{session}}
+      $?.exitstatus.should == 0
+
+      %x{tmux list-windows -t #{session}}.split("\n").map { |window|
+        if window =~ /[0-9]+:\s(.+?)\s/
+          $1
+        end
+      }.should == ["alpha.1", "bravo.1", "all"]
+      sleep 1
+      %x{tmux kill-session -t #{session}}
+      output = %x[cat /tmp/foreman.#{session}.log]
+      output.should =~ /alpha\.1.+\.\/alpha: No such file or directory/
+      output.should =~ /bravo\.1.+\.\/bravo: No such file or directory/
+    end
+  end
+end

spec/spec_helper.rb

@@ -6,6 +6,7 @@ SimpleCov.start do
 end
 
 require "rspec"
+require "timecop"
 require "fakefs/safe"
 require "fakefs/spec_helpers"