text: const CanvasPool = Phaser.Display.Canvas.CanvasPool;
  
  var TestFont = function (familyName, testString) {
      // Get canvas from pool
      var canvas = CanvasPool.create();
      var context = canvas.getContext('2d');
  
      // Resize canvas
      var font = `8px ${familyName}`;
      context.font = font;
      var width = Math.ceil(context.measureText(testString).width);
      var baseline = width;
      var height = 2 * baseline;
      if ((width !== canvas.width) || (height !== canvas.height)) {
          canvas.width = width;
          canvas.height = height;
      }
  
      // Clear canvas
      context.fillStyle = '#000';
      context.fillRect(0, 0, width, height);
  
      // Draw text
      context.textBaseline = 'alphabetic';
      context.fillStyle = '#fff';
      context.font = font;
      context.fillText(testString, 0, baseline);
  
      // Check image data array
      var imagedata = context.getImageData(0, 0, width, height).data;
      var hasPixel = false;
      for (var i = 0, cnt = imagedata.length; i < cnt; i += 4) {
          if (imagedata[i] > 0) {
              hasPixel = true;
              break;
          }
      }
  
      // Recycle canvas
      CanvasPool.remove(canvas);
      return hasPixel;
  }
  
  export default TestFont;