import pytest
from unittest.mock import patch, MagicMock

def test_shader_manager_initialization_and_compilation():
 # Import inside test to allow patching OpenGL before import if needed
 # In this case, we patch the OpenGL.GL functions used by ShaderManager
 with patch("src.shader_manager.gl") as mock_gl:
  mock_gl.glCreateProgram.return_value = 1
  mock_gl.glCreateShader.return_value = 2
  mock_gl.glGetShaderiv.return_value = mock_gl.GL_TRUE
  mock_gl.glGetProgramiv.return_value = mock_gl.GL_TRUE
  
  from src.shader_manager import ShaderManager
  
  manager = ShaderManager()
  
  # Basic vertex and fragment shader source
  vert_src = "void main() {}"
  frag_src = "void main() {}"
  
  program_id = manager.compile_shader(vert_src, frag_src)
  
  assert program_id == 1
  assert mock_gl.glCreateProgram.called
  assert mock_gl.glCreateShader.called