package engine
 
 import (

 	"bytes"

 	"strings"

 	"testing"
 )
 
 func TestRegister(t *testing.T) {
 	if err := Register("dummy1", nil); err != nil {
 		t.Fatal(err)
 	}
 
 	if err := Register("dummy1", nil); err == nil {
 		t.Fatalf("Expecting error, got none")
 	}

 	// Register is global so let's cleanup to avoid conflicts
 	defer unregister("dummy1")

 	eng := New()

 	//Should fail because global handlers are copied

 	//at the engine creation
 	if err := eng.Register("dummy1", nil); err == nil {
 		t.Fatalf("Expecting error, got none")
 	}
 
 	if err := eng.Register("dummy2", nil); err != nil {
 		t.Fatal(err)
 	}
 
 	if err := eng.Register("dummy2", nil); err == nil {
 		t.Fatalf("Expecting error, got none")
 	}

 	defer unregister("dummy2")

 }
 
 func TestJob(t *testing.T) {

 	eng := New()

 	job1 := eng.Job("dummy1", "--level=awesome")
 
 	if job1.handler != nil {
 		t.Fatalf("job1.handler should be empty")
 	}
 

 	h := func(j *Job) Status {
 		j.Printf("%s\n", j.Name)
 		return 42

 	}
 
 	eng.Register("dummy2", h)

 	defer unregister("dummy2")

 	job2 := eng.Job("dummy2", "--level=awesome")
 
 	if job2.handler == nil {
 		t.Fatalf("job2.handler shouldn't be nil")
 	}
 

 	if job2.handler(job2) != 42 {

 		t.Fatalf("handler dummy2 was not found in job2")
 	}
 }

 func TestEngineCommands(t *testing.T) {

 	eng := New()

 	handler := func(job *Job) Status { return StatusOK }
 	eng.Register("foo", handler)
 	eng.Register("bar", handler)
 	eng.Register("echo", handler)
 	eng.Register("die", handler)
 	var output bytes.Buffer
 	commands := eng.Job("commands")
 	commands.Stdout.Add(&output)
 	commands.Run()
 	expected := "bar\ncommands\ndie\necho\nfoo\n"
 	if result := output.String(); result != expected {
 		t.Fatalf("Unexpected output:\nExpected = %v\nResult   = %v\n", expected, result)
 	}
 }
 

 func TestEngineString(t *testing.T) {

 	eng1 := New()
 	eng2 := New()

 	s1 := eng1.String()
 	s2 := eng2.String()
 	if eng1 == eng2 {
 		t.Fatalf("Different engines should have different names (%v == %v)", s1, s2)
 	}
 }
 
 func TestEngineLogf(t *testing.T) {

 	eng := New()

 	input := "Test log line"
 	if n, err := eng.Logf("%s\n", input); err != nil {
 		t.Fatal(err)
 	} else if n < len(input) {
 		t.Fatalf("Test: Logf() should print at least as much as the input\ninput=%d\nprinted=%d", len(input), n)
 	}
 }

 
 func TestParseJob(t *testing.T) {

 	eng := New()

 	// Verify that the resulting job calls to the right place
 	var called bool
 	eng.Register("echo", func(job *Job) Status {
 		called = true
 		return StatusOK
 	})
 	input := "echo DEBUG=1 hello world VERBOSITY=42"
 	job, err := eng.ParseJob(input)
 	if err != nil {
 		t.Fatal(err)
 	}
 	if job.Name != "echo" {
 		t.Fatalf("Invalid job name: %v", job.Name)
 	}
 	if strings.Join(job.Args, ":::") != "hello:::world" {
 		t.Fatalf("Invalid job args: %v", job.Args)
 	}
 	if job.Env().Get("DEBUG") != "1" {
 		t.Fatalf("Invalid job env: %v", job.Env)
 	}
 	if job.Env().Get("VERBOSITY") != "42" {
 		t.Fatalf("Invalid job env: %v", job.Env)
 	}
 	if len(job.Env().Map()) != 2 {
 		t.Fatalf("Invalid job env: %v", job.Env)
 	}
 	if err := job.Run(); err != nil {
 		t.Fatal(err)
 	}
 	if !called {
 		t.Fatalf("Job was not called")
 	}
 }

 
 func TestCatchallEmptyName(t *testing.T) {
 	eng := New()
 	var called bool
 	eng.RegisterCatchall(func(job *Job) Status {
 		called = true
 		return StatusOK
 	})
 	err := eng.Job("").Run()
 	if err == nil {
 		t.Fatalf("Engine.Job(\"\").Run() should return an error")
 	}
 	if called {
 		t.Fatalf("Engine.Job(\"\").Run() should return an error")
 	}
 }