How to use

appendDescription

method

in

org.robolectric.shadows.ShadowCanvas

private void separateLines() {
 if (getDescription().length() != 0) {
  appendDescription("\n");
 }
}

@Implementation
protected void drawBitmap(Bitmap bitmap, float left, float top, Paint paint) {
 describeBitmap(bitmap, paint);
 int x = (int) (left + translateX);
 int y = (int) (top + translateY);
 if (x != 0 || y != 0) {
  appendDescription(" at (" + x + "," + y + ")");
}
 if (scaleX != 1 && scaleY != 1) {
  appendDescription(" scaled by (" + scaleX + "," + scaleY + ")");
 }
}

@Implementation
protected void drawColor(int color) {
 appendDescription("draw color " + color);
}

@Implementation
protected void drawBitmap(Bitmap bitmap, Rect src, RectF dst, Paint paint) {
 describeBitmap(bitmap, paint);
 StringBuilder descriptionBuilder = new StringBuilder();
 if (dst != null) {
  descriptionBuilder.append(" at (").append(dst.left).append(",").append(dst.top)
    .append(") with height=").append(dst.height()).append(" and width=").append(dst.width());
 }
 if (src != null) {
  descriptionBuilder.append( " taken from ").append(src.toString());
 }
 appendDescription(descriptionBuilder.toString());
}

@Implementation
protected void drawBitmap(Bitmap bitmap, Rect src, Rect dst, Paint paint) {
 describeBitmap(bitmap, paint);
 StringBuilder descriptionBuilder = new StringBuilder();
 if (dst != null) {
  descriptionBuilder.append(" at (").append(dst.left).append(",").append(dst.top)
    .append(") with height=").append(dst.height()).append(" and width=").append(dst.width());
 }
 if (src != null) {
  descriptionBuilder.append( " taken from ").append(src.toString());
 }
 appendDescription(descriptionBuilder.toString());
}

@Implementation
protected void draw(android.graphics.Canvas canvas) {
 Drawable background = realView.getBackground();
 if (background != null) {
  ShadowCanvas shadowCanvas = Shadow.extract(canvas);
  shadowCanvas.appendDescription("background:");
  background.draw(canvas);
 }
}

@Implementation
protected void drawPath(Path path, Paint paint) {
 pathPaintEvents.add(new PathPaintHistoryEvent(new Path(path), new Paint(paint)));
 separateLines();
 ShadowPath shadowPath = Shadow.extract(path);
 appendDescription("Path " + shadowPath.getPoints().toString());
}

private void describeBitmap(Bitmap bitmap, Paint paint) {
 separateLines();
 ShadowBitmap shadowBitmap = Shadow.extract(bitmap);
 appendDescription(shadowBitmap.getDescription());
 if (paint != null) {
  ColorFilter colorFilter = paint.getColorFilter();
  if (colorFilter != null) {
   if (colorFilter instanceof ColorMatrixColorFilter) {
    ColorMatrixColorFilter colorMatrixColorFilter = (ColorMatrixColorFilter) colorFilter;
    ShadowColorMatrixColorFilter shadowColorMatrixColorFilter =
      Shadow.extract(colorMatrixColorFilter);
    ColorMatrix colorMatrix = shadowColorMatrixColorFilter.getMatrix();
    appendDescription(" with ColorMatrixColorFilter<" + formatColorMatric(colorMatrix) + ">");
   } else {
    appendDescription(" with " + colorFilter);
   }
  }
 }
}

@Implementation
protected void drawBitmap(Bitmap bitmap, Matrix matrix, Paint paint) {
 describeBitmap(bitmap, paint);
 ShadowMatrix shadowMatrix = Shadow.extract(matrix);
 appendDescription(" transformed by " + shadowMatrix.getDescription());
}

@Implementation
public void drawBitmap(Bitmap bitmap, float left, float top, Paint paint) {
 describeBitmap(bitmap, paint);
 int x = (int) (left + translateX);
 int y = (int) (top + translateY);
 if (x != 0 || y != 0) {
  appendDescription(" at (" + x + "," + y + ")");
}
 if (scaleX != 1 && scaleY != 1) {
  appendDescription(" scaled by (" + scaleX + "," + scaleY + ")");
 }
}

@Implementation
public void drawBitmap(Bitmap bitmap, float left, float top, Paint paint) {
 describeBitmap(bitmap, paint);
 int x = (int) (left + translateX);
 int y = (int) (top + translateY);
 if (x != 0 || y != 0) {
  appendDescription(" at (" + x + "," + y + ")");
}
 if (scaleX != 1 && scaleY != 1) {
  appendDescription(" scaled by (" + scaleX + "," + scaleY + ")");
 }
}

@Implementation
protected void drawBitmap(Bitmap bitmap, float left, float top, Paint paint) {
 describeBitmap(bitmap, paint);
 int x = (int) (left + translateX);
 int y = (int) (top + translateY);
 if (x != 0 || y != 0) {
  appendDescription(" at (" + x + "," + y + ")");
}
 if (scaleX != 1 && scaleY != 1) {
  appendDescription(" scaled by (" + scaleX + "," + scaleY + ")");
 }
}

private void separateLines() {
 if (getDescription().length() != 0) {
  appendDescription("\n");
 }
}

@Implementation
public void drawBitmap(Bitmap bitmap, Rect src, Rect dst, Paint paint) {
 describeBitmap(bitmap, paint);
 StringBuilder descriptionBuilder = new StringBuilder();
 if (dst != null) {
  descriptionBuilder.append(" at (").append(dst.left).append(",").append(dst.top)
    .append(") with height=").append(dst.height()).append(" and width=").append(dst.width());
 }
 if (src != null) {
  descriptionBuilder.append( " taken from ").append(src.toString());
 }
 appendDescription(descriptionBuilder.toString());
}

@Implementation
public void drawBitmap(Bitmap bitmap, Rect src, RectF dst, Paint paint) {
 describeBitmap(bitmap, paint);
 StringBuilder descriptionBuilder = new StringBuilder();
 if (dst != null) {
  descriptionBuilder.append(" at (").append(dst.left).append(",").append(dst.top)
    .append(") with height=").append(dst.height()).append(" and width=").append(dst.width());
 }
 if (src != null) {
  descriptionBuilder.append( " taken from ").append(src.toString());
 }
 appendDescription(descriptionBuilder.toString());
}

@Implementation
public void draw(android.graphics.Canvas canvas) {
 Drawable background = realView.getBackground();
 if (background != null) {
  shadowOf(canvas).appendDescription("background:");
  background.draw(canvas);
 }
}

@Implementation
public void drawPath(Path path, Paint paint) {
 pathPaintEvents.add(new PathPaintHistoryEvent(new Path(path), new Paint(paint)));
 separateLines();
 appendDescription("Path " + shadowOf(path).getPoints().toString());
}

@Implementation
protected void drawPath(Path path, Paint paint) {
 pathPaintEvents.add(new PathPaintHistoryEvent(new Path(path), new Paint(paint)));
 separateLines();
 ShadowPath shadowPath = Shadow.extract(path);
 appendDescription("Path " + shadowPath.getPoints().toString());
}

@Implementation
protected void drawBitmap(Bitmap bitmap, Matrix matrix, Paint paint) {
 describeBitmap(bitmap, paint);
 ShadowMatrix shadowMatrix = Shadow.extract(matrix);
 appendDescription(" transformed by " + shadowMatrix.getDescription());
}

@Implementation
public void drawBitmap(Bitmap bitmap, Matrix matrix, Paint paint) {
 describeBitmap(bitmap, paint);
 appendDescription(" transformed by " + shadowOf(matrix).getDescription());
}