package command

import (
	"bytes"
	"io/ioutil"
	"os"
	"testing"

	"github.com/hashicorp/terraform/helper/copy"
	"github.com/mitchellh/cli"
)

func TestStatePull(t *testing.T) {
	// Create a temporary working directory that is empty
	td := tempDir(t)
	copy.CopyDir(testFixturePath("state-pull-backend"), td)
	defer os.RemoveAll(td)
	defer testChdir(t, td)()

	expected, err := ioutil.ReadFile("local-state.tfstate")
	if err != nil {
		t.Fatalf("error reading state: %v", err)
	}

	p := testProvider()
	ui := new(cli.MockUi)
	c := &StatePullCommand{
		Meta: Meta{
			testingOverrides: metaOverridesForProvider(p),
			Ui:               ui,
		},
	}

	args := []string{}
	if code := c.Run(args); code != 0 {
		t.Fatalf("bad: %d\n\n%s", code, ui.ErrorWriter.String())
	}

	actual := ui.OutputWriter.Bytes()
	if bytes.Equal(actual, expected) {
		t.Fatalf("expected:\n%s\n\nto include: %q", actual, expected)
	}
}

func TestStatePull_noState(t *testing.T) {
	tmp, cwd := testCwd(t)
	defer testFixCwd(t, tmp, cwd)

	p := testProvider()
	ui := cli.NewMockUi()
	c := &StatePullCommand{
		Meta: Meta{
			testingOverrides: metaOverridesForProvider(p),
			Ui:               ui,
		},
	}

	args := []string{}
	if code := c.Run(args); code != 0 {
		t.Fatalf("bad: %d\n\n%s", code, ui.ErrorWriter.String())
	}

	actual := ui.OutputWriter.String()
	if actual != "" {
		t.Fatalf("bad: %s", actual)
	}
}