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

Test: ../../resources/webgl_test_files/conformance2/buffers/get-buffer-sub-data.html
[ 1: PASS ] getError was expected value: NO_ERROR : Should be no errors from setup.
[ 2: PASS ] getError was expected value: NO_ERROR : Should be no errors from buffer setup.
[ 3: PASS ] getError was expected value: NO_ERROR : after evaluating: gl.getBufferSubData(gl.ARRAY_BUFFER, 0, retArray)
[ 4: PASS ] gl.getBufferSubData(gl.ARRAY_BUFFER, 0, new ArrayBuffer(4)) threw exception TypeError: Argument 3 ('dstData') to WebGL2RenderingContext.getBufferSubData must be an instance of ArrayBufferView.
[ 5: PASS ] getError was expected value: NO_ERROR : Should not generate GL error
[ 6: PASS ] gl.getBufferSubData(gl.ARRAY_BUFFER, 0, null) threw exception TypeError: Argument 3 ('dstData') to WebGL2RenderingContext.getBufferSubData must be an instance of ArrayBufferView.
[ 7: PASS ] getError was expected value: NO_ERROR : Should not generate GL error
[ 8: PASS ] The returned array buffer matches original data
[ 9: PASS ] getError was expected value: NO_ERROR : after evaluating: gl.getBufferSubData(gl.ARRAY_BUFFER, 0, retArray, 2)
[ 10: PASS ] areArraysEqual(retArray.slice(0, 2), [0, 0]) is true
[ 11: PASS ] areArraysEqual(retArray.slice(2), floatArray.slice(0, floatArray.length - 2)) is true
[ 12: PASS ] getError was expected value: NO_ERROR : after evaluating: gl.getBufferSubData(gl.ARRAY_BUFFER, 0, retArray, retArray.length)
[ 13: PASS ] areArraysEqual(retArray, [0, 0, 0, 0, 0, 0, 0, 0, 0]) is true
[ 14: FAIL ] getError expected: INVALID_VALUE. Was INVALID_OPERATION : after evaluating: gl.getBufferSubData(gl.ARRAY_BUFFER, 0, retArray, retArray.length + 1)
[ 15: PASS ] getError was expected value: NO_ERROR : after evaluating: gl.getBufferSubData(gl.ARRAY_BUFFER, 0, retArray, 2, 2)
[ 16: PASS ] areArraysEqual(retArray.slice(0, 2), [0, 0]) is true
[ 17: PASS ] areArraysEqual(retArray.slice(2, 4), floatArray.slice(0, 2)) is true
[ 18: PASS ] areArraysEqual(retArray.slice(4), [0, 0, 0, 0, 0]) is true
[ 19: PASS ] getError was expected value: NO_ERROR : after evaluating: gl.getBufferSubData(gl.ARRAY_BUFFER, 0, retArray, retArray.length - 1, 1)
[ 20: PASS ] areArraysEqual(retArray.slice(0, 8), [0, 0, 0, 0, 0, 0, 0, 0]) is true
[ 21: PASS ] areArraysEqual(retArray.slice(8), floatArray.slice(0, 1)) is true
[ 22: FAIL ] getError expected: INVALID_VALUE. Was INVALID_OPERATION : after evaluating: gl.getBufferSubData(gl.ARRAY_BUFFER, 0, retArray, retArray.length - 1, 2)
[ 23: FAIL ] getError expected: INVALID_VALUE. Was INVALID_OPERATION : Extra length should generate INVALID_VALUE.
[ 24: FAIL ] getError expected: INVALID_VALUE. Was INVALID_OPERATION : after evaluating: gl.getBufferSubData(gl.ARRAY_BUFFER, retArray.byteLength + 1, retArray)
[ 25: FAIL ] getError expected: INVALID_VALUE. Was INVALID_OPERATION : after evaluating: gl.getBufferSubData(gl.ARRAY_BUFFER, 1, retArray)
[ 26: PASS ] getError was expected value: INVALID_OPERATION : after evaluating: gl.getBufferSubData(gl.ELEMENT_ARRAY_BUFFER, 0, retArray)
[ 27: FAIL ] getError expected: INVALID_VALUE. Was INVALID_OPERATION : after evaluating: gl.getBufferSubData(gl.ARRAY_BUFFER, -1, retArray)
[ 28: PASS ] getError was expected value: NO_ERROR : after evaluating: gl.getBufferSubData(gl.ARRAY_BUFFER, 0, retArray)
[ 29: PASS ] areArraysEqual(retArray, [0, 0, 0, 0, 0, 0, 0, 0, 0]) is true
[ 30: PASS ] getError was expected value: NO_ERROR : after evaluating: gl.getBufferSubData(gl.ARRAY_BUFFER, 0, retArray)
[ 31: PASS ] areArraysEqual(retArray, floatArray) is true
[ 32: PASS ] getError was expected value: NO_ERROR : after evaluating: gl.getBufferSubData(gl.ARRAY_BUFFER, 0, retArray)
[ 33: PASS ] areArraysEqual(retArray, floatArray) is true
[ 34: PASS ] successfullyParsed is true
[ FAIL ] 6 failures reported