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

Test: ../../../resources/webgl_test_files/conformance/textures/misc/texture-copying-feedback-loops.html
[ 1: PASS ] framebuffer should be FRAMEBUFFER_COMPLETE.
[ 2: PASS ] getError was expected value: NO_ERROR : after setup
[ 3: PASS ] getError was expected value: NO_ERROR : after copyTexImage2D to same texture but different level
[ 4: FAIL ] getError expected: INVALID_OPERATION. Was NO_ERROR : after copyTexImage2D to same texture same level, invalid feedback loop
[ 5: PASS ] getError was expected value: NO_ERROR : after copyTexImage2D to different texture
[ 6: PASS ] getError was expected value: NO_ERROR : after copyTexSubImage2D to same texture but different level
[ 7: FAIL ] getError expected: INVALID_OPERATION. Was NO_ERROR : after copyTexSubImage2D to same texture same level, invalid feedback loop
[ 8: PASS ] getError was expected value: NO_ERROR : after copyTexSubImage2D to different texture
[ 9: PASS ] successfullyParsed is true
[ FAIL ] 2 failures reported