Various test cleanups

A bit less code, faster in some situations but mostly just better readability.

PS: Tests on develop failed even before these changes so the updated images are included.

test/test.go

@@ -134,10 +134,8 @@ func AssertRendersToMarkup(t *testing.T, masterFilename string, c fyne.Canvas, m
 // deltaX/Y is the dragging distance: <0 for dragging up/left, >0 for dragging down/right.
 func Drag(c fyne.Canvas, pos fyne.Position, deltaX, deltaY float32) {
 	matches := func(object fyne.CanvasObject) bool {
-		if _, ok := object.(fyne.Draggable); ok {
-			return true
-		}
-		return false
+		_, ok := object.(fyne.Draggable)
+		return ok
 	}
 	o, p, _ := driver.FindObjectAtPositionMatching(pos, matches, c.Overlays().Top(), c.Content())
 	if o == nil {
@@ -189,10 +187,8 @@ func MoveMouse(c fyne.Canvas, pos fyne.Position) {
 		oldHovered = tc.hovered
 	}
 	matches := func(object fyne.CanvasObject) bool {
-		if _, ok := object.(desktop.Hoverable); ok {
-			return true
-		}
-		return false
+		_, ok := object.(desktop.Hoverable)
+		return ok
 	}
 	o, p, _ := driver.FindObjectAtPositionMatching(pos, matches, c.Overlays().Top(), c.Content())
 	if o != nil {
@@ -223,10 +219,8 @@ func MoveMouse(c fyne.Canvas, pos fyne.Position) {
 // deltaX/Y is the scrolling distance: <0 for scrolling up/left, >0 for scrolling down/right.
 func Scroll(c fyne.Canvas, pos fyne.Position, deltaX, deltaY float32) {
 	matches := func(object fyne.CanvasObject) bool {
-		if _, ok := object.(fyne.Scrollable); ok {
-			return true
-		}
-		return false
+		_, ok := object.(fyne.Scrollable)
+		return ok
 	}
 	o, _, _ := driver.FindObjectAtPositionMatching(pos, matches, c.Overlays().Top(), c.Content())
 	if o == nil {
@@ -343,18 +337,15 @@ func handleFocusOnTap(c fyne.Canvas, obj any) {
 	if c == nil {
 		return
 	}
-	unfocus := true
+
 	if focus, ok := obj.(fyne.Focusable); ok {
-		if dis, ok := obj.(fyne.Disableable); !ok || !dis.Disabled() {
-			unfocus = false
-			if focus != c.Focused() {
-				unfocus = true
-			}
+		dis, ok := obj.(fyne.Disableable)
+		if (!ok || !dis.Disabled()) && focus == c.Focused() {
+			return
 		}
 	}
-	if unfocus {
-		c.Unfocus()
-	}
+
+	c.Unfocus()
 }
 
 func typeChars(chars []rune, keyDown func(rune)) {

test/testapp.go

@@ -25,7 +25,7 @@ type testApp struct {
 	prefs        fyne.Preferences
 	propertyLock sync.RWMutex
 	storage      fyne.Storage
-	lifecycle    fyne.Lifecycle
+	lifecycle    app.Lifecycle
 	cloud        fyne.CloudProvider
 
 	// user action variables
@@ -99,7 +99,7 @@ func (a *testApp) Storage() fyne.Storage {
 }
 
 func (a *testApp) Lifecycle() fyne.Lifecycle {
-	return a.lifecycle
+	return &a.lifecycle
 }
 
 func (a *testApp) Metadata() fyne.AppMetadata {
@@ -152,8 +152,7 @@ func NewApp() fyne.App {
 	settings := &testSettings{scale: 1.0, theme: Theme()}
 	prefs := internal.NewInMemoryPreferences()
 	store := &testStorage{}
-	test := &testApp{settings: settings, prefs: prefs, storage: store, driver: NewDriver().(*testDriver),
-		lifecycle: &app.Lifecycle{}}
+	test := &testApp{settings: settings, prefs: prefs, storage: store, driver: NewDriver().(*testDriver)}
 	root, _ := store.docRootURI()
 	store.Docs = &internal.Docs{RootDocURI: root}
 	painter.ClearFontCache()

test/testcanvas.go

@@ -14,9 +14,7 @@ import (
 	"fyne.io/fyne/v2/theme"
 )
 
-var (
-	dummyCanvas fyne.Canvas
-)
+var dummyCanvas WindowlessCanvas
 
 // WindowlessCanvas provides functionality for a canvas to operate without a window
 type WindowlessCanvas interface {
@@ -91,7 +89,8 @@ func NewTransparentCanvasWithPainter(painter SoftwarePainter) WindowlessCanvas {
 
 func (c *testCanvas) Capture() image.Image {
 	cache.Clean(true)
-	bounds := image.Rect(0, 0, scale.ToScreenCoordinate(c, c.Size().Width), scale.ToScreenCoordinate(c, c.Size().Height))
+	size := c.Size()
+	bounds := image.Rect(0, 0, scale.ToScreenCoordinate(c, size.Width), scale.ToScreenCoordinate(c, size.Height))
 	img := image.NewNRGBA(bounds)
 	if !c.transparent {
 		draw.Draw(img, bounds, image.NewUniform(theme.BackgroundColor()), image.Point{}, draw.Src)
@@ -194,8 +193,9 @@ func (c *testCanvas) Resize(size fyne.Size) {
 	}
 
 	if padded {
-		content.Resize(size.Subtract(fyne.NewSize(theme.Padding()*2, theme.Padding()*2)))
-		content.Move(fyne.NewPos(theme.Padding(), theme.Padding()))
+		padding := theme.Padding()
+		content.Resize(size.Subtract(fyne.NewSquareSize(padding * 2)))
+		content.Move(fyne.NewSquareOffsetPos(padding))
 	} else {
 		content.Resize(size)
 		content.Move(fyne.NewPos(0, 0))
@@ -221,7 +221,7 @@ func (c *testCanvas) SetContent(content fyne.CanvasObject) {
 
 	padding := fyne.NewSize(0, 0)
 	if c.padded {
-		padding = fyne.NewSize(theme.Padding()*2, theme.Padding()*2)
+		padding = fyne.NewSquareSize(theme.Padding() * 2)
 	}
 	c.Resize(content.MinSize().Add(padding))
 }
@@ -276,11 +276,12 @@ func (c *testCanvas) focusManager() *app.FocusManager {
 }
 
 func (c *testCanvas) objectTrees() []fyne.CanvasObject {
-	trees := make([]fyne.CanvasObject, 0, len(c.Overlays().List())+1)
+	overlays := c.Overlays().List()
+	trees := make([]fyne.CanvasObject, 0, len(overlays)+1)
 	if c.content != nil {
 		trees = append(trees, c.content)
 	}
-	trees = append(trees, c.Overlays().List()...)
+	trees = append(trees, overlays...)
 	return trees
 }
 

test/testdriver.go

@@ -19,7 +19,7 @@ type SoftwarePainter interface {
 }
 
 type testDriver struct {
-	device       *device
+	device       device
 	painter      SoftwarePainter
 	windows      []fyne.Window
 	windowsMutex sync.RWMutex
@@ -42,10 +42,7 @@ func NewDriver() fyne.Driver {
 // NewDriverWithPainter creates a new dummy driver that will pass the given
 // painter to all canvases created
 func NewDriverWithPainter(painter SoftwarePainter) fyne.Driver {
-	return &testDriver{
-		painter:      painter,
-		windowsMutex: sync.RWMutex{},
-	}
+	return &testDriver{painter: painter}
 }
 
 func (d *testDriver) AbsolutePositionForObject(co fyne.CanvasObject) fyne.Position {
@@ -80,7 +77,6 @@ func (d *testDriver) CreateWindow(string) fyne.Window {
 	}
 
 	window := &testWindow{canvas: canvas, driver: d}
-	window.clipboard = &testClipboard{}
 
 	d.windowsMutex.Lock()
 	d.windows = append(d.windows, window)
@@ -89,10 +85,7 @@ func (d *testDriver) CreateWindow(string) fyne.Window {
 }
 
 func (d *testDriver) Device() fyne.Device {
-	if d.device == nil {
-		d.device = &device{}
-	}
-	return d.device
+	return &d.device
 }
 
 // RenderedTextSize looks up how bit a string would be if drawn on screen
@@ -127,7 +120,10 @@ func (d *testDriver) removeWindow(w *testWindow) {
 		i++
 	}
 
-	d.windows = append(d.windows[:i], d.windows[i+1:]...)
+	copy(d.windows[i:], d.windows[i+1:])
+	d.windows[len(d.windows)-1] = nil // Allow the garbage collector to reclaim the memory.
+	d.windows = d.windows[:len(d.windows)-1]
+
 	d.windowsMutex.Unlock()
 }
 

test/testfile.go

@@ -1,6 +1,7 @@
 package test
 
 import (
+	"errors"
 	"fmt"
 	"io"
 	"os"
@@ -44,14 +45,16 @@ func (f *file) URI() fyne.URI {
 
 func openFile(uri fyne.URI, create bool) (*file, error) {
 	if uri.Scheme() != "file" {
-		return nil, fmt.Errorf("unsupported URL protocol")
+		return nil, errors.New("unsupported URL protocol")
 	}
 
-	path := uri.String()[7:]
-	f, err := os.Open(path)
-	if err != nil && create {
-		f, err = os.Create(path)
+	path := uri.Path()
+	if create {
+		f, err := os.Create(path)
+		return &file{File: f, path: path}, err
 	}
+
+	f, err := os.Open(path)
 	return &file{File: f, path: path}, err
 }
 
@@ -65,7 +68,7 @@ func (d *testDriver) FileWriterForURI(uri fyne.URI) (fyne.URIWriteCloser, error)
 
 func (d *testDriver) ListerForURI(uri fyne.URI) (fyne.ListableURI, error) {
 	if uri.Scheme() != "file" {
-		return nil, fmt.Errorf("unsupported URL protocol")
+		return nil, errors.New("unsupported URL protocol")
 	}
 
 	path := uri.String()[len(uri.Scheme())+3 : len(uri.String())]

test/testwindow.go

@@ -13,7 +13,7 @@ type testWindow struct {
 	onCloseIntercepted func()
 
 	canvas    *testCanvas
-	clipboard fyne.Clipboard
+	clipboard testClipboard
 	driver    *testDriver
 	menu      *fyne.MainMenu
 }
@@ -34,7 +34,7 @@ func (w *testWindow) CenterOnScreen() {
 }
 
 func (w *testWindow) Clipboard() fyne.Clipboard {
-	return w.clipboard
+	return &w.clipboard
 }
 
 func (w *testWindow) Close() {