Package com.vaadin.testbench.screenshot

Class ImageComparison

java.lang.Object

com.vaadin.testbench.screenshot.ImageComparison

public class ImageComparison
extends Object

Class with features for comparing 2 images.

Constructor Summary

Constructors

Constructor	Description
ImageComparison()

Method Summary

Modifier and Type	Method	Description
boolean	compareImages(BufferedImage referenceImage, BufferedImage screenshotImage, double errorTolerance)
boolean	imageEqualToReference(BufferedImage screenshotImage, BufferedImage referenceImage, String referenceFileName, double errorTolerance)
boolean	imageEqualToReference(BufferedImage screenshotImage, String referenceFileId, double errorTolerance, org.openqa.selenium.Capabilities capabilities)	Compare image [name] to image under /reference/.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ImageComparison

public ImageComparison()

Method Detail

imageEqualToReference

public boolean imageEqualToReference(BufferedImage screenshotImage,
                                     String referenceFileId,
                                     double errorTolerance,
                                     org.openqa.selenium.Capabilities capabilities)
                              throws IOException

Compare image [name] to image under /reference/. Images may differ in RGB hues 0.1% (default) per macroblock of 16x16

Parameters:

screenshotImage - Image of canvas (must have proper dimensions)

referenceFileId - File id for this image without .png extension

errorTolerance - Allowed RGB error for a macroblock (value range 0-1 default 0.025 == 2.5%)

capabilities - browser capabilities

Returns:

true if images are the same

Throws:

IOException - if the reference image cannot be read or error screenshot cannot be written

imageEqualToReference

public boolean imageEqualToReference(BufferedImage screenshotImage,
                                     BufferedImage referenceImage,
                                     String referenceFileName,
                                     double errorTolerance)

compareImages

public boolean compareImages(BufferedImage referenceImage,
                             BufferedImage screenshotImage,
                             double errorTolerance)