This test runs the WebGL Test listed below in an iframe and reports PASS or FAIL.

Test: ../../resources/webgl_test_files/conformance2/context/context-attributes-depth-stencil-antialias-obeyed.html
[ 1: PASS ] Context created with the correct antialias, depth, and stencil.
[ 2: FAIL ] stencil = true is not obeyed
[ 3: FAIL ] stencil = true is not obeyed
[ 4: FAIL ] stencil = true is not obeyed
[ 5: FAIL ] stencil = true is not obeyed
[ 6: PASS ] Context created with the correct antialias, depth, and stencil.
[ 7: PASS ] Context created with the correct antialias, depth, and stencil.
[ 8: PASS ] Context created with the correct antialias, depth, and stencil.
[ 9: PASS ] Context created with the correct antialias, depth, and stencil.
[ 10: PASS ] successfullyParsed is true
[ FAIL ] 4 failures reported