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"use strict";
description("Tests deletion behavior for WebGL2 buffer, sampler, vertexArray and transformFeedback objects.");

var wtu = WebGLTestUtils;
var gl = wtu.create3DContext(undefined, undefined, 2);
var shouldGenerateGLError = wtu.shouldGenerateGLError;

debug("");
debug("buffer deletion");

var bufferBaseUniform = gl.createBuffer();
shouldBeNonNull("bufferBaseUniform");
shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindBufferBase(gl.UNIFORM_BUFFER, 0, bufferBaseUniform)");
shouldBe("gl.getParameter(gl.UNIFORM_BUFFER_BINDING)", "bufferBaseUniform");
shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteBuffer(bufferBaseUniform)");
shouldBeFalse("gl.isBuffer(bufferBaseUniform)");
shouldBeNull("gl.getParameter(gl.UNIFORM_BUFFER_BINDING)");
shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.bindBufferBase(gl.UNIFORM_BUFFER, 0, bufferBaseUniform)");
shouldBeNull("gl.getParameter(gl.UNIFORM_BUFFER_BINDING)");

var bufferBaseTransformFeedback = gl.createBuffer();
shouldBeNonNull("bufferBaseTransformFeedback");
shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindBufferBase(gl.TRANSFORM_FEEDBACK_BUFFER, 0, bufferBaseTransformFeedback)");
shouldBe("gl.getParameter(gl.TRANSFORM_FEEDBACK_BUFFER_BINDING)", "bufferBaseTransformFeedback");
shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteBuffer(bufferBaseTransformFeedback)");
shouldBeFalse("gl.isBuffer(bufferBaseTransformFeedback)");
shouldBeNull("gl.getParameter(gl.TRANSFORM_FEEDBACK_BUFFER_BINDING)");
shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.bindBufferBase(gl.TRANSFORM_FEEDBACK_BUFFER, 0, bufferBaseTransformFeedback)");
shouldBeNull("gl.getParameter(gl.TRANSFORM_FEEDBACK_BUFFER_BINDING)");

var bufferRangeUniform = gl.createBuffer();
shouldBeNonNull("bufferRangeUniform");
shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindBufferRange(gl.UNIFORM_BUFFER, 0, bufferRangeUniform, 0, gl.UNIFORM_BUFFER_OFFSET_ALIGNMENT)");
shouldBe("gl.getParameter(gl.UNIFORM_BUFFER_BINDING)", "bufferRangeUniform");
shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteBuffer(bufferRangeUniform)");
shouldBeFalse("gl.isBuffer(bufferRangeUniform)");
shouldBeNull("gl.getParameter(gl.UNIFORM_BUFFER_BINDING)");
shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.bindBufferRange(gl.UNIFORM_BUFFER, 0, bufferRangeUniform, 0, gl.UNIFORM_BUFFER_OFFSET_ALIGNMENT)");
shouldBeNull("gl.getParameter(gl.UNIFORM_BUFFER_BINDING)");

var bufferRangeTransformFeedback = gl.createBuffer();
shouldBeNonNull("bufferRangeTransformFeedback");
shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindBufferRange(gl.TRANSFORM_FEEDBACK_BUFFER, 0, bufferRangeTransformFeedback, 0, 4)");
shouldBe("gl.getParameter(gl.TRANSFORM_FEEDBACK_BUFFER_BINDING)", "bufferRangeTransformFeedback");
shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteBuffer(bufferRangeTransformFeedback)");
shouldBeFalse("gl.isBuffer(bufferRangeTransformFeedback)");
shouldBeNull("gl.getParameter(gl.TRANSFORM_FEEDBACK_BUFFER_BINDING)");
shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.bindBufferRange(gl.TRANSFORM_FEEDBACK_BUFFER, 0, bufferRangeTransformFeedback, 0, 4)");
shouldBeNull("gl.getParameter(gl.TRANSFORM_FEEDBACK_BUFFER_BINDING)");

debug("");
debug("sampler deletion");

var sampler = gl.createSampler();
shouldBeNonNull("sampler");
shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindSampler(0, sampler)");
shouldBe("gl.getParameter(gl.SAMPLER_BINDING)", "sampler");
shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteSampler(sampler)");
shouldBeFalse("gl.isSampler(sampler)");
shouldBeNull("gl.getParameter(gl.SAMPLER_BINDING)");
shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.bindSampler(0, sampler)");
shouldBeNull("gl.getParameter(gl.SAMPLER_BINDING)");

debug("");
debug("vertexArray deletion");

var vertexArray = gl.createVertexArray();
shouldBeNonNull("vertexArray");
shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindVertexArray(vertexArray)");
shouldBe("gl.getParameter(gl.VERTEX_ARRAY_BINDING)", "vertexArray");
shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteVertexArray(vertexArray)");
shouldBeFalse("gl.isVertexArray(vertexArray)");
shouldBeNull("gl.getParameter(gl.VERTEX_ARRAY_BINDING)");
shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.bindVertexArray(vertexArray)");
shouldBeNull("gl.getParameter(gl.VERTEX_ARRAY_BINDING)");

debug("");
debug("transformFeedback deletion");

var transformFeedback = gl.createTransformFeedback();
shouldBeNonNull("transformFeedback");
shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindTransformFeedback(gl.TRANSFORM_FEEDBACK, transformFeedback)");
shouldBe("gl.getParameter(gl.TRANSFORM_FEEDBACK_BINDING)", "transformFeedback");
shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteTransformFeedback(transformFeedback)");
shouldBeFalse("gl.isTransformFeedback(transformFeedback)");
shouldBeNull("gl.getParameter(gl.TRANSFORM_FEEDBACK_BINDING)");
shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.bindTransformFeedback(gl.TRANSFORM_FEEDBACK, transformFeedback)");
shouldBeNull("gl.getParameter(gl.TRANSFORM_FEEDBACK_BINDING)");

var successfullyParsed = true;
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