picogl.tests.test_vertex_array_object

Unit tests for the VertexArrayObject class in the PicoGL OpenGL backend.

This module contains a comprehensive suite of unit tests for verifying the correctness, robustness, and interface of the picogl.backend.modern.core.vertex.array.object.VertexArrayObject class, which manages OpenGL Vertex Array Objects (VAOs) in modern OpenGL rendering workflows.

The tests cover:

• Object initialization with and without handle parameter

• VAO binding/unbinding operations

• VBO management and attribute configuration

• EBO (Element Buffer Object) management

• Layout descriptor configuration

• Drawing operations with various modes

• Buffer cleanup and memory management

• Error handling and edge cases

Dependencies:

• unittest (standard library)

• unittest.mock.MagicMock for OpenGL function mocking

• numpy for test data

• picogl.backend.modern.core.vertex.array.object.VertexArrayObject

• picogl.buffers.attributes.LayoutDescriptor

To run the tests:

python -m unittest picogl.tests.test_vertex_array_object

Classes

TestVertexArrayObject

Test cases for VertexArrayObject class.

Module Contents

class picogl.tests.test_vertex_array_object.TestVertexArrayObject(methodName='runTest')

Bases: unittest.TestCase

Test cases for VertexArrayObject class.

setUp()

Set up test fixtures before each test method.

tearDown()

Clean up after each test method.

test_initialization_with_handle()

Test VertexArrayObject initialization with provided handle.

test_initialization_without_handle()

Test VertexArrayObject initialization without handle (auto-generate).

test_initialization_raises_error_when_no_context()

Test that initialization raises error when OpenGL context is not ready.

test_bind()

Test bind method.

test_unbind()

Test unbind method.

test_delete()

Test delete method.

test_add_vbo()

Test add_vbo method.

test_add_attribute()

Test add_attribute method.

test_add_ebo()

Test add_ebo method.

test_set_ebo()

Test set_ebo method.

test_set_layout()

Test set_layout method with LayoutDescriptor.

test_set_layout_with_none_vao()

Test set_layout method when vao is None.

test_add_vbo_object()

Test add_vbo_object method for VBO management.

test_get_vbo_object()

Test get_vbo_object method for VBO retrieval.

test_index_count_property()

Test index_count property.

test_draw_with_arrays()

Test draw method with vertex arrays (no EBO).

test_draw_with_elements()

Test draw method with element arrays (EBO present).

test_draw_with_auto_index_count()

Test draw method with automatic index count from EBO.

test_delete_buffers()

Test delete_buffers method.

test_context_manager()

Test that VertexArrayObject can be used as a context manager.

test_repr_string()

Test string representation of VertexArrayObject.

test_error_handling_in_set_layout()

Test error handling in set_layout method.

test_error_handling_in_index_count()

Test error handling in index_count property.