Tests Set operations of FontFaceSet. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS document.fonts.size is 3 check forEach PASS callbackArgs[0] is an instance of FontFace PASS callbackArgs[0] === callbackArgs[1] is true PASS callbackArgs[2] === document.fonts is true PASS thisValue === thisArg is true PASS faces.length is 3 PASS faces[0].family is "Font1" PASS faces[1].family is "Font2" PASS faces[2].family is "Font3" PASS document.fonts.has(faces[0]) is true PASS document.fonts.has(faces[1]) is true PASS document.fonts.has(faces[2]) is true check keys PASS faces.length is 3 PASS faces[0].family is "Font1" PASS faces[1].family is "Font2" PASS faces[2].family is "Font3" PASS document.fonts.has(faces[0]) is true PASS document.fonts.has(faces[1]) is true PASS document.fonts.has(faces[2]) is true check values PASS faces.length is 3 PASS faces[0].family is "Font1" PASS faces[1].family is "Font2" PASS faces[2].family is "Font3" PASS document.fonts.has(faces[0]) is true PASS document.fonts.has(faces[1]) is true PASS document.fonts.has(faces[2]) is true check entries PASS entry[0] === entry[1] is true PASS entry[0] === entry[1] is true PASS entry[0] === entry[1] is true PASS faces.length is 3 PASS faces[0].family is "Font1" PASS faces[1].family is "Font2" PASS faces[2].family is "Font3" PASS document.fonts.has(faces[0]) is true PASS document.fonts.has(faces[1]) is true PASS document.fonts.has(faces[2]) is true PASS document.fonts.has(null) threw exception TypeError: Failed to execute 'has' on 'FontFaceSet': parameter 1 is not of type 'FontFace'.. PASS document.fonts.has("Font1") threw exception TypeError: Failed to execute 'has' on 'FontFaceSet': parameter 1 is not of type 'FontFace'.. PASS document.fonts.add(null) threw exception TypeError: Failed to execute 'add' on 'FontFaceSet': parameter 1 is not of type 'FontFace'.. PASS document.fonts.add("Font1") threw exception TypeError: Failed to execute 'add' on 'FontFaceSet': parameter 1 is not of type 'FontFace'.. PASS document.fonts.delete(null) threw exception TypeError: Failed to execute 'delete' on 'FontFaceSet': parameter 1 is not of type 'FontFace'.. PASS document.fonts.delete("Font1") threw exception TypeError: Failed to execute 'delete' on 'FontFaceSet': parameter 1 is not of type 'FontFace'.. PASS document.fonts.has(nonCssConnectedFace) is false PASS document.fonts.add(faces[0]) did not throw exception. PASS document.fonts.size is 3 PASS document.fonts.delete(faces[0]) is false PASS document.fonts.size is 3 PASS document.fonts.size is 4 PASS document.fonts.has(nonCssConnectedFace) is true PASS document.fonts.size is 4 PASS document.fonts.size is 3 PASS document.fonts.has(nonCssConnectedFace) is false PASS document.fonts.size is 3 PASS document.fonts.size is 4 PASS document.fonts.size is 3 PASS successfullyParsed is true TEST COMPLETE