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|
package tui
import (
"testing"
"time"
)
type mockViewable struct {
root *Element
watchers []Watcher
}
func newMockViewable(root *Element, watchers ...Watcher) *mockViewable {
return &mockViewable{root: root, watchers: watchers}
}
func (m *mockViewable) GetRoot() *Element {
return m.root
}
func (m *mockViewable) GetWatchers() []Watcher {
return m.watchers
}
type mockWatcher struct {
started bool
eventQueue chan<- func()
stopCh <-chan struct{}
startCalled chan struct{}
}
func newMockWatcher() *mockWatcher {
return &mockWatcher{
startCalled: make(chan struct{}),
}
}
func (m *mockWatcher) Start(eventQueue chan<- func(), stopCh <-chan struct{}) {
m.started = true
m.eventQueue = eventQueue
m.stopCh = stopCh
close(m.startCalled)
}
type mockComponentRoot struct{}
func (m *mockComponentRoot) Render(app *App) *Element { return New() }
type stopAwareWatcher struct {
stopped chan struct{}
}
func newStopAwareWatcher() *stopAwareWatcher {
return &stopAwareWatcher{stopped: make(chan struct{}, 1)}
}
func (w *stopAwareWatcher) Start(eventQueue chan<- func(), stopCh <-chan struct{}) {
go func() {
<-stopCh
w.stopped <- struct{}{}
}()
}
func TestApp_SetRoot_WithViewable(t *testing.T) {
type tc struct {
numWatchers int
expectRoot bool
}
tests := map[string]tc{
"viewable with no watchers": {
numWatchers: 0,
expectRoot: true,
},
"viewable with one watcher": {
numWatchers: 1,
expectRoot: true,
},
"viewable with multiple watchers": {
numWatchers: 3,
expectRoot: true,
},
}
for name, tt := range tests {
t.Run(name, func(t *testing.T) {
app := &App{
focus: newFocusManager(),
buffer: NewBuffer(80, 24),
watcherQueue: make(chan func(), 256),
merged: make(chan Event, 256),
stopCh: make(chan struct{}),
}
root := New()
watchers := make([]Watcher, tt.numWatchers)
mockWatchers := make([]*mockWatcher, tt.numWatchers)
for i := 0; i < tt.numWatchers; i++ {
mw := newMockWatcher()
mockWatchers[i] = mw
watchers[i] = mw
}
view := newMockViewable(root, watchers...)
app.SetRootView(view)
if tt.expectRoot && app.Root() != root {
t.Error("Root() should return the root from Viewable")
}
for i, mw := range mockWatchers {
if !mw.started {
t.Errorf("Watcher %d was not started", i)
}
if mw.eventQueue != app.watcherQueue {
t.Errorf("Watcher %d received wrong eventQueue", i)
}
}
})
}
}
func TestApp_SetRoot_WithElement(t *testing.T) {
app := &App{
focus: newFocusManager(),
buffer: NewBuffer(80, 24),
watcherQueue: make(chan func(), 256),
merged: make(chan Event, 256),
stopCh: make(chan struct{}),
}
root := New()
app.SetRoot(root)
if app.Root() != root {
t.Error("Root() should return the element passed to SetRoot()")
}
}
func TestApp_Run_EventLoopLogic(t *testing.T) {
app := &App{
focus: newFocusManager(),
buffer: NewBuffer(80, 24),
merged: make(chan Event, 256),
watcherQueue: make(chan func(), 256),
stopCh: make(chan struct{}),
stopped: false,
}
var eventProcessed bool
app.merged <- UpdateEvent{fn: func() {
eventProcessed = true
}}
select {
case ev := <-app.merged:
app.Dispatch(ev)
case <-time.After(100 * time.Millisecond):
t.Fatal("Expected event in queue")
}
if !eventProcessed {
t.Error("Event was not processed")
}
app.Stop()
select {
case <-app.stopCh:
default:
t.Error("Stop() should close stopCh")
}
}
func TestApp_Stop_IsIdempotent(t *testing.T) {
app := &App{
focus: newFocusManager(),
buffer: NewBuffer(80, 24),
merged: make(chan Event, 256),
watcherQueue: make(chan func(), 256),
stopCh: make(chan struct{}),
stopped: false,
}
app.Stop()
if !app.stopped {
t.Error("Stop() should set stopped to true")
}
app.Stop()
if !app.stopped {
t.Error("stopped should still be true after second Stop() call")
}
}
func TestApp_SetRoot_ClearsRootComponent(t *testing.T) {
app := &App{
focus: newFocusManager(),
buffer: NewBuffer(80, 24),
merged: make(chan Event, 256),
watcherQueue: make(chan func(), 256),
stopCh: make(chan struct{}),
mounts: newMountState(),
}
app.SetRootComponent(&mockComponentRoot{})
if app.rootComponent == nil {
t.Fatal("expected rootComponent to be set after SetRootComponent")
}
app.SetRoot(New())
if app.rootComponent != nil {
t.Fatal("expected rootComponent to be cleared after SetRoot")
}
}
func TestApp_SetRoot_StopsPreviousRootWatchers(t *testing.T) {
app := &App{
focus: newFocusManager(),
buffer: NewBuffer(80, 24),
merged: make(chan Event, 256),
watcherQueue: make(chan func(), 256),
stopCh: make(chan struct{}),
mounts: newMountState(),
}
w1 := newStopAwareWatcher()
view1 := newMockViewable(New(), w1)
app.SetRootView(view1)
app.SetRoot(New())
select {
case <-w1.stopped:
case <-time.After(200 * time.Millisecond):
t.Fatal("expected previous root watcher to be stopped")
}
}
|