Make it possible to handle toasts in integration tests

Use it in two selected tests to demonstrate what it looks like.

pkg/integration/components/test_driver.go

@@ -102,8 +102,19 @@ func (self *TestDriver) ExpectPopup() *Popup {
 	return &Popup{t: self}
 }
 
-func (self *TestDriver) ExpectToast(matcher *TextMatcher) {
-	self.Views().AppStatus().Content(matcher)
+func (self *TestDriver) ExpectToast(matcher *TextMatcher) *TestDriver {
+	t := self.gui.NextToast()
+	if t == nil {
+		self.gui.Fail("Expected toast, but didn't get one")
+	} else {
+		self.matchString(matcher, "Unexpected toast message",
+			func() string {
+				return *t
+			},
+		)
+	}
+
+	return self
 }
 
 func (self *TestDriver) ExpectClipboard(matcher *TextMatcher) {

pkg/integration/components/test_test.go

@@ -78,6 +78,10 @@ func (self *fakeGuiDriver) SetCaption(string) {
 func (self *fakeGuiDriver) SetCaptionPrefix(string) {
 }
 
+func (self *fakeGuiDriver) NextToast() *string {
+	return nil
+}
+
 func TestManualFailure(t *testing.T) {
 	test := NewIntegrationTest(NewIntegrationTestArgs{
 		Description: unitTestDescription,

pkg/integration/tests/tag/crud_annotated.go

@@ -65,6 +65,7 @@ var CrudAnnotated = NewIntegrationTest(NewIntegrationTestArgs{
 					Title(Equals("Delete tag 'new-tag'?")).
 					Content(Equals("Are you sure you want to delete the remote tag 'new-tag' from 'origin'?")).
 					Confirm()
+				t.ExpectToast(Equals("Remote tag deleted"))
 			}).
 			Lines(
 				MatchesRegexp(`new-tag.*message`).IsSelected(),

pkg/integration/tests/tag/crud_lightweight.go

@@ -70,6 +70,7 @@ var CrudLightweight = NewIntegrationTest(NewIntegrationTestArgs{
 					Title(Equals("Delete tag 'new-tag'?")).
 					Content(Equals("Are you sure you want to delete the remote tag 'new-tag' from 'origin'?")).
 					Confirm()
+				t.ExpectToast(Equals("Remote tag deleted"))
 			}).
 			Lines(
 				MatchesRegexp(`new-tag.*initial commit`).IsSelected(),

pkg/integration/types/types.go

@@ -43,4 +43,6 @@ type GuiDriver interface {
 	View(viewName string) *gocui.View
 	SetCaption(caption string)
 	SetCaptionPrefix(prefix string)
+	// Pop the next toast that was displayed; returns nil if there was none
+	NextToast() *string
 }