ChromeDevToolsUrlFilter.java

    @Test
    public void filterUrls() {

        //enable Network
        chromeDevTools.send(Network.enable(Optional.empty(), Optional.empty(), Optional.empty()));

        //set blocked URL patterns
        chromeDevTools.send(Network.setBlockedURLs(ImmutableList.of("*.css", "*.png")));

        //add event listener to verify that css and png are blocked
        chromeDevTools.addListener(Network.loadingFailed(), loadingFailed -> {

            if (loadingFailed.getResourceType().equals(ResourceType.Stylesheet)) {
                Assert.assertEquals(loadingFailed.getBlockedReason(), BlockedReason.inspector);
            }

            else if (loadingFailed.getResourceType().equals(ResourceType.Image)) {
                Assert.assertEquals(loadingFailed.getBlockedReason(), BlockedReason.inspector);
            }

        });

        chromeDriver.get("https://apache.org");

    }