packer-cn/packer/ui_test.go

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package packer
import (
"bytes"
"os"
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"strings"
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"testing"
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)
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// This reads the output from the bytes.Buffer in our test object
// and then resets the buffer.
func readWriter(ui *BasicUi) (result string) {
buffer := ui.Writer.(*bytes.Buffer)
result = buffer.String()
buffer.Reset()
return
}
// Reset the input Reader than add some input to it.
func writeReader(ui *BasicUi, input string) {
buffer := ui.Reader.(*bytes.Buffer)
buffer.WriteString(input)
}
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func readErrorWriter(ui *BasicUi) (result string) {
buffer := ui.ErrorWriter.(*bytes.Buffer)
result = buffer.String()
buffer.Reset()
return
}
func testUi() *BasicUi {
return &BasicUi{
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Reader: new(bytes.Buffer),
Writer: new(bytes.Buffer),
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ErrorWriter: new(bytes.Buffer),
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}
}
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func TestColoredUi(t *testing.T) {
bufferUi := testUi()
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ui := &ColoredUi{UiColorYellow, UiColorRed, bufferUi}
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if !ui.supportsColors() {
t.Skip("skipping for ui without color support")
}
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ui.Say("foo")
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result := readWriter(bufferUi)
if result != "\033[1;33mfoo\033[0m\n" {
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t.Fatalf("invalid output: %s", result)
}
ui.Message("foo")
result = readWriter(bufferUi)
if result != "\033[0;33mfoo\033[0m\n" {
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t.Fatalf("invalid output: %s", result)
}
ui.Error("foo")
result = readWriter(bufferUi)
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if result != "" {
t.Fatalf("invalid output: %s", result)
}
result = readErrorWriter(bufferUi)
if result != "\033[1;31mfoo\033[0m\n" {
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t.Fatalf("invalid output: %s", result)
}
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}
func TestColoredUi_noColorEnv(t *testing.T) {
bufferUi := testUi()
ui := &ColoredUi{UiColorYellow, UiColorRed, bufferUi}
// Set the env var to get rid of the color
oldenv := os.Getenv("PACKER_NO_COLOR")
os.Setenv("PACKER_NO_COLOR", "1")
defer os.Setenv("PACKER_NO_COLOR", oldenv)
ui.Say("foo")
result := readWriter(bufferUi)
if result != "foo\n" {
t.Fatalf("invalid output: %s", result)
}
ui.Message("foo")
result = readWriter(bufferUi)
if result != "foo\n" {
t.Fatalf("invalid output: %s", result)
}
ui.Error("foo")
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result = readErrorWriter(bufferUi)
if result != "foo\n" {
t.Fatalf("invalid output: %s", result)
}
}
func TestTargettedUi(t *testing.T) {
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bufferUi := testUi()
targettedUi := &TargettedUi{
Target: "foo",
Ui: bufferUi,
}
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var actual, expected string
targettedUi.Say("foo")
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actual = readWriter(bufferUi)
expected = "==> foo: foo\n"
if actual != expected {
t.Fatalf("bad: %#v", actual)
}
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targettedUi.Message("foo")
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actual = readWriter(bufferUi)
expected = " foo: foo\n"
if actual != expected {
t.Fatalf("bad: %#v", actual)
}
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targettedUi.Error("bar")
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actual = readErrorWriter(bufferUi)
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expected = "==> foo: bar\n"
if actual != expected {
t.Fatalf("bad: %#v", actual)
}
targettedUi.Say("foo\nbar")
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actual = readWriter(bufferUi)
expected = "==> foo: foo\n==> foo: bar\n"
if actual != expected {
t.Fatalf("bad: %#v", actual)
}
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}
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func TestColoredUi_ImplUi(t *testing.T) {
var raw interface{}
raw = &ColoredUi{}
if _, ok := raw.(Ui); !ok {
t.Fatalf("ColoredUi must implement Ui")
}
}
func TestTargettedUi_ImplUi(t *testing.T) {
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var raw interface{}
raw = &TargettedUi{}
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if _, ok := raw.(Ui); !ok {
t.Fatalf("TargettedUi must implement Ui")
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}
}
func TestBasicUi_ImplUi(t *testing.T) {
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var raw interface{}
raw = &BasicUi{}
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if _, ok := raw.(Ui); !ok {
t.Fatalf("BasicUi must implement Ui")
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}
}
func TestBasicUi_Error(t *testing.T) {
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bufferUi := testUi()
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var actual, expected string
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bufferUi.Error("foo")
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actual = readErrorWriter(bufferUi)
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expected = "foo\n"
if actual != expected {
t.Fatalf("bad: %#v", actual)
}
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bufferUi.ErrorWriter = nil
bufferUi.Error("5")
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actual = readWriter(bufferUi)
expected = "5\n"
if actual != expected {
t.Fatalf("bad: %#v", actual)
}
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}
func TestBasicUi_Say(t *testing.T) {
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bufferUi := testUi()
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var actual, expected string
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bufferUi.Say("foo")
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actual = readWriter(bufferUi)
expected = "foo\n"
if actual != expected {
t.Fatalf("bad: %#v", actual)
}
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bufferUi.Say("5")
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actual = readWriter(bufferUi)
expected = "5\n"
if actual != expected {
t.Fatalf("bad: %#v", actual)
}
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}
func TestBasicUi_Ask(t *testing.T) {
var actual, expected string
var err error
var testCases = []struct {
Prompt, Input, Answer string
}{
{"[c]ontinue or [a]bort", "c\n", "c"},
{"[c]ontinue or [a]bort", "c", "c"},
// Empty input shouldn't give an error
{"Name", "Joe Bloggs\n", "Joe Bloggs"},
{"Name", "Joe Bloggs", "Joe Bloggs"},
{"Name", "\n", ""},
}
for _, testCase := range testCases {
// Because of the internal bufio we can't eaily reset the input, so create a new one each time
bufferUi := testUi()
writeReader(bufferUi, testCase.Input)
actual, err = bufferUi.Ask(testCase.Prompt)
if err != nil {
t.Fatal(err)
}
if actual != testCase.Answer {
t.Fatalf("bad answer: %#v", actual)
}
actual = readWriter(bufferUi)
expected = testCase.Prompt + " "
if actual != expected {
t.Fatalf("bad prompt: %#v", actual)
}
}
}
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func TestMachineReadableUi_ImplUi(t *testing.T) {
var raw interface{}
raw = &MachineReadableUi{}
if _, ok := raw.(Ui); !ok {
t.Fatalf("MachineReadableUi must implement Ui")
}
}
func TestMachineReadableUi(t *testing.T) {
var data, expected string
buf := new(bytes.Buffer)
ui := &MachineReadableUi{Writer: buf}
// No target
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ui.Machine("foo", "bar", "baz")
data = strings.SplitN(buf.String(), ",", 2)[1]
expected = ",foo,bar,baz\n"
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if data != expected {
t.Fatalf("bad: %s", data)
}
// Target
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buf.Reset()
ui.Machine("mitchellh,foo", "bar", "baz")
data = strings.SplitN(buf.String(), ",", 2)[1]
expected = "mitchellh,foo,bar,baz\n"
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if data != expected {
t.Fatalf("bad: %s", data)
}
// Commas
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buf.Reset()
ui.Machine("foo", "foo,bar")
data = strings.SplitN(buf.String(), ",", 2)[1]
expected = ",foo,foo%!(PACKER_COMMA)bar\n"
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if data != expected {
t.Fatalf("bad: %s", data)
}
// New lines
buf.Reset()
ui.Machine("foo", "foo\n")
data = strings.SplitN(buf.String(), ",", 2)[1]
expected = ",foo,foo\\n\n"
if data != expected {
t.Fatalf("bad: %#v", data)
}
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}