XTURE_2D, 0, ext.COMPRESSED_SRGB_ALPHA_BPTC_UNORM_EXT, 4, 4, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
    wtu.glErrorShouldBe(gl, [gl.INVALID_VALUE, gl.INVALID_OPERATION], "COMPRESSED_SRGB_ALPHA_BPTC_UNORM_EXT fails with texImage2D");

    if (contextVersion >= 2) {
      gl.texImage2D(gl.TEXTURE_2D, 0, ext.COMPRESSED_RGB_BPTC_SIGNED_FLOAT_EXT, 4, 4, 0, gl.RGB, gl.FLOAT, null);
      wtu.glErrorShouldBe(gl, [gl.INVALID_VALUE, gl.INVALID_OPERATION], "COMPRESSED_RGB_BPTC_SIGNED_FLOAT_EXT fails with texImage2D");
