progress: Add test for error event

Signed-off-by: Christopher Crone <christopher.crone@docker.com>

progress/tty_test.go

@@ -18,6 +18,7 @@ package progress
 
 import (
 	"fmt"
+	"sync"
 	"testing"
 	"time"
 
@@ -54,3 +55,32 @@ func TestLineText(t *testing.T) {
 	out = lineText(ev, 50, lineWidth, true)
 	assert.Equal(t, "\x1b[31m . id Text Status                            0.0s\n\x1b[0m", out)
 }
+
+func TestErrorEvent(t *testing.T) {
+	w := &ttyWriter{
+		events: map[string]Event{},
+		mtx:    &sync.RWMutex{},
+	}
+	e := Event{
+		ID:         "id",
+		Text:       "Text",
+		Status:     Working,
+		StatusText: "Working",
+		startTime:  time.Now(),
+		spinner: &spinner{
+			chars: []string{"."},
+		},
+	}
+	// Fire "Working" event and check end time isn't touched
+	w.Event(e)
+	event, ok := w.events[e.ID]
+	assert.True(t, ok)
+	assert.True(t, event.endTime.Equal(time.Time{}))
+
+	// Fire "Error" event and check end time is set
+	e.Status = Error
+	w.Event(e)
+	event, ok = w.events[e.ID]
+	assert.True(t, ok)
+	assert.True(t, event.endTime.After(time.Now().Add(-10*time.Second)))
+}