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Tests.startUnit = function () {
    var canvas = document.getElementById('gl');
    var gl = wrapGLContext(getGLContext(canvas));
    return [gl];
}

Tests.setup = function(gl) {
    var tex = gl.createTexture();
    gl.bindTexture(gl.TEXTURE_2D, tex);
    return [gl]
}

Tests.teardown = function(gl,tex) {
    gl.bindTexture(gl.TEXTURE_2D, null);
    gl.deleteTexture(tex);
}

Tests.testTexImage2D = function(gl) {
    var data = new Uint8Array(4);
    assertGLError(gl, gl.INVALID_OPERATION, "not enough data", function(){
        gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 2,1,0,gl.RGBA,gl.UNSIGNED_BYTE, data);
    });
    assertGLError(gl, gl.INVALID_OPERATION, "not enough data", function(){
        gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 1,2,0,gl.RGBA,gl.UNSIGNED_BYTE, data);
    });
    assertGLError(gl, gl.INVALID_ENUM, "bad target", function(){
        gl.texImage2D(gl.FLOAT, 0, gl.RGBA, 1,1,0,gl.RGBA,gl.UNSIGNED_BYTE, null);
    });
    assertGLErrorIn(gl, [gl.INVALID_ENUM, gl.INVALID_VALUE],
                    "bad internal format/format", function(){
        gl.texImage2D(gl.TEXTURE_2D, 0, gl.FLOAT, 1,1,0,gl.FLOAT,gl.UNSIGNED_BYTE, null);
    });
    assertGLError(gl, gl.INVALID_VALUE, "border > 0", function(){
        gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 1,1,48,gl.RGBA,gl.UNSIGNED_BYTE, null);
    });
    // The spec says zero size is OK. If you disagree please list the section
    // in the spec that details this issue.
    assertOk("zero size", function(){
        gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 0,0,0,gl.RGBA,gl.UNSIGNED_BYTE, null);
    });
    assertGLError(gl, gl.INVALID_VALUE, "negative width", function(){
        gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, -1,1,0,gl.RGBA,gl.UNSIGNED_BYTE, null);
    });
    assertGLError(gl, gl.INVALID_VALUE, "negative height", function(){
        gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 1,-1,0,gl.RGBA,gl.UNSIGNED_BYTE, null);
    });
    assertGLErrorIn(gl, [gl.INVALID_ENUM, gl.INVALID_OPERATION], "bad format", function(){
        gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 1,1,0,gl.FLOAT,gl.UNSIGNED_BYTE, null);
    });
    assertGLErrorIn(gl, [gl.INVALID_ENUM, gl.INVALID_OPERATION], "bad type", function(){
        gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 1,1,0,gl.RGBA,gl.TEXTURE_2D, null);
    });
    assertGLError(gl, gl.INVALID_OPERATION, "not enough data", function(){
        gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 1,1,0,gl.RGBA,gl.UNSIGNED_BYTE, new Uint8Array(3));
    });
    assertGLError(gl, gl.INVALID_OPERATION, "format and type incompatible",function(){
        gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 1,1,0,gl.RGBA,gl.UNSIGNED_SHORT_5_6_5, null);
    });
    assertGLError(gl, gl.INVALID_OPERATION, "format and type incompatible",function(){
        gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGB, 1,1,0,gl.RGB,gl.UNSIGNED_SHORT_4_4_4_4, null);
    });

    assertThrows(gl, true, "too few args", function(){
        gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 2, 2, 0, gl.RGBA, gl.UNSIGNED_BYTE);
    });
    assertThrows(gl, false, "too many args", function(){
        gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 2, 2, 0, gl.RGBA, gl.UNSIGNED_BYTE, null, null);
    });

    assertThrows(gl, true, "bad TexSourceType", function(){
        gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, window);
    });
    assertThrows(gl, true, "fake TexSourceType", function(){
        var fakeObj = {
            get width() { throw 7 },
            get height() { throw 7 },
            data: new Uint8ClampedArray(10)
        };
        gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, fakeObj);
    });
}


Tests.endUnit = function(gl) {
}

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