bubbletea/tea_test.go

152 lines
2.4 KiB
Go

package tea
import (
"bytes"
"sync/atomic"
"testing"
"time"
)
type incrementMsg struct{}
type testModel struct {
executed atomic.Value
counter atomic.Value
}
func (m testModel) Init() Cmd {
return nil
}
func (m *testModel) Update(msg Msg) (Model, Cmd) {
switch msg.(type) {
case incrementMsg:
i := m.counter.Load()
if i == nil {
m.counter.Store(1)
} else {
m.counter.Store(i.(int) + 1)
}
case KeyMsg:
return m, Quit
}
return m, nil
}
func (m *testModel) View() string {
m.executed.Store(true)
return "success\n"
}
func TestTeaModel(t *testing.T) {
var buf bytes.Buffer
var in bytes.Buffer
in.Write([]byte("q"))
p := NewProgram(&testModel{}, WithInput(&in), WithOutput(&buf))
if _, err := p.Run(); err != nil {
t.Fatal(err)
}
if buf.Len() == 0 {
t.Fatal("no output")
}
}
func TestTeaQuit(t *testing.T) {
var buf bytes.Buffer
var in bytes.Buffer
m := &testModel{}
p := NewProgram(m, WithInput(&in), WithOutput(&buf))
go func() {
for {
time.Sleep(time.Millisecond)
if m.executed.Load() != nil {
p.Quit()
return
}
}
}()
if _, err := p.Run(); err != nil {
t.Fatal(err)
}
}
func TestTeaKill(t *testing.T) {
var buf bytes.Buffer
var in bytes.Buffer
m := &testModel{}
p := NewProgram(m, WithInput(&in), WithOutput(&buf))
go func() {
for {
time.Sleep(time.Millisecond)
if m.executed.Load() != nil {
p.Kill()
return
}
}
}()
if _, err := p.Run(); err != ErrProgramKilled {
t.Fatalf("Expected %v, got %v", ErrProgramKilled, err)
}
}
func TestTeaBatchMsg(t *testing.T) {
var buf bytes.Buffer
var in bytes.Buffer
inc := func() Msg {
return incrementMsg{}
}
m := &testModel{}
p := NewProgram(m, WithInput(&in), WithOutput(&buf))
go func() {
p.Send(batchMsg{inc, inc})
for {
time.Sleep(time.Millisecond)
i := m.counter.Load()
if i != nil && i.(int) >= 2 {
p.Quit()
return
}
}
}()
if _, err := p.Run(); err != nil {
t.Fatal(err)
}
if m.counter.Load() != 2 {
t.Fatalf("counter should be 2, got %d", m.counter.Load())
}
}
func TestTeaSequenceMsg(t *testing.T) {
var buf bytes.Buffer
var in bytes.Buffer
inc := func() Msg {
return incrementMsg{}
}
m := &testModel{}
p := NewProgram(m, WithInput(&in), WithOutput(&buf))
go p.Send(sequenceMsg{inc, inc, Quit})
if _, err := p.Run(); err != nil {
t.Fatal(err)
}
if m.counter.Load() != 2 {
t.Fatalf("counter should be 2, got %d", m.counter.Load())
}
}