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Copyright (c) 2019 The Khronos Group Inc.
Use of this source code is governed by an MIT-style license that can be
found in the LICENSE.txt file.
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<script type="application/javascript" src="../unit.js"></script>
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Tests.startUnit = function () {
  var canvas = document.createElement('canvas');
  var gl = wrapGLContext(getGLContext(canvas));
  return [gl];
}

Tests.setup = function(gl) {
  assert(0 == gl.getError());
  return [gl];
}

Tests.teardown = function(gl) {
}

Tests.endUnit = function(gl) {
}

Tests.testVertexAttribPointerVBO = function(gl) {
  var vbo = gl.createBuffer();
  gl.bindBuffer(gl.ARRAY_BUFFER, vbo);
  gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(4), gl.STATIC_DRAW);
  gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);
  assertFail("negative offset",
      function(){gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, -4);});
  assertOk("out of range offset (OK because we can change the buffer later)",
      function(){gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 1200);});
  assertFail("Offset that is incompatible with type",
      function(){gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 3);});
  assertFail("negative stride",
      function(){gl.vertexAttribPointer(0, 3, gl.FLOAT, false, -1, 0);});
  assertFail("bad size",
      function(){gl.vertexAttribPointer(0, 5, gl.FLOAT, false, 0, 0);});
  assertFail("stride that doesn't match type",
      function(){gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 1, 0);});
  assertFail("bad type",
      function(){gl.vertexAttribPointer(0, 3, gl.TEXTURE_2D, false, 0, 0);});
  assertFail("bad index",
      function(){gl.vertexAttribPointer(-1, 3, gl.FLOAT, false, 0, 0);});
  assertFail("bad index (big negative)",
      function(){gl.vertexAttribPointer(-8693948, 3, gl.FLOAT, false, 0, 0);});
  assertFail("bad index (big positive)",
      function(){gl.vertexAttribPointer(8693948, 3, gl.FLOAT, false, 0, 0);});
  gl.bindBuffer(gl.ARRAY_BUFFER, null);
  assertOk("binding to null buffer with offset=0",
      function(){gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);});
  assertFail("binding to null buffer with offset!=0",
      function(){gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 16);});
  gl.bindBuffer(gl.ARRAY_BUFFER, vbo);
  gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);
  gl.bindBuffer(gl.ARRAY_BUFFER, null);
  gl.deleteBuffer(vbo);
  throwError(gl);
}

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