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

Test: ../../resources/webgl_test_files/conformance2/reading/read-pixels-into-pixel-pack-buffer.html
[ 1: PASS ] context exists
[ 2: PASS ] getError was expected value: INVALID_OPERATION : should generate INVALID_OPERATION if pixel pack buffer is bound
[ 3: PASS ] getError was expected value: NO_ERROR :
[ 4: FAIL ] getError expected: INVALID_VALUE. Was NO_ERROR : offset < 0
[ 5: FAIL ] getError expected: INVALID_OPERATION. Was NO_ERROR : offset > buffer size
[ 6: FAIL ] getError expected: INVALID_OPERATION. Was NO_ERROR : pixel pack buffer is not large enough
[ 7: PASS ] getError was expected value: NO_ERROR : reading pixels outside of the framebuffer should succeed.
[ 8: PASS ] getError was expected value: NO_ERROR : reading pixels outside of the framebuffer should succeed.
[ 9: FAIL ] getError expected: INVALID_VALUE. Was NO_ERROR : reading pixels with negative width / height should generate INVALID_VALUE.
[ 10: FAIL ] getError expected: INVALID_ENUM. Was NO_ERROR : Format should not be able to read as DEPTH_COMPONENT
[ 11: FAIL ] getError expected: INVALID_ENUM. Was NO_ERROR : Format should not be able to read as DEPTH_STENCIL
[ 12: FAIL ] getError expected: INVALID_ENUM. Was NO_ERROR : Format should not be able to read as R8
[ 13: FAIL ] getError expected: INVALID_ENUM. Was NO_ERROR : Format should not be able to read as RGBA4
[ 14: FAIL ] getError expected: INVALID_ENUM. Was NO_ERROR : Format should not be able to read as LUMINANCE
[ 15: FAIL ] getError expected: INVALID_ENUM. Was NO_ERROR : Format should not be able to read as LUMINANCE_ALPHA
[ 16: FAIL ] getError expected: INVALID_ENUM. Was NO_ERROR : Type should not be able to read as UNSIGNED_INT_24_8
[ 17: PASS ] getError was expected value: NO_ERROR : The combination of format/type should be able to read as RGBA / UNSIGNED_BYTE
[ 18: FAIL ] getError expected: INVALID_OPERATION. Was NO_ERROR : The combination of format/type should not be able to read as RGB / UNSIGNED_BYTE
[ 19: FAIL ] getError expected: INVALID_OPERATION. Was NO_ERROR : The combination of format/type should not be able to read as RGB / UNSIGNED_SHORT_5_6_5
[ 20: FAIL ] getError expected: INVALID_OPERATION. Was NO_ERROR : The combination of format/type should not be able to read as RGBA / UNSIGNED_SHORT_5_5_5_1
[ 21: FAIL ] getError expected: INVALID_OPERATION. Was NO_ERROR : The combination of format/type should not be able to read as RGBA / UNSIGNED_SHORT_4_4_4_4
[ 22: FAIL ] getError expected: INVALID_OPERATION. Was NO_ERROR : The combination of format/type should not be able to read as ALPHA / UNSIGNED_BYTE
[ 23: FAIL ] getError expected: INVALID_OPERATION. Was NO_ERROR : The combination of format/type should not be able to read as RED / UNSIGNED_BYTE
[ 24: FAIL ] getError expected: INVALID_OPERATION. Was NO_ERROR : The combination of format/type should not be able to read as RGBA_INTEGER / UNSIGNED_INT
[ 25: FAIL ] getError expected: INVALID_OPERATION. Was NO_ERROR : The combination of format/type should not be able to read as RGBA_INTEGER / INT
[ 26: PASS ] getError was expected value: NO_ERROR :
[ 27: FAIL ] getError expected: INVALID_OPERATION. Was NO_ERROR : no pixel pack buffer bound
[ 28: PASS ] successfullyParsed is true
[ FAIL ] 20 failures reported