text: from . import utils
  from bead import Layout, export_layout
  import filecmp
  import pytest
  
  
  def test_export_valid(tmpdir):
      baseline_path = utils.get_baseline_path('export_valid.png')
      p = utils.create_project(tmpdir, 'p', 2, 2)
      with open(p.layout_path, 'w') as f:
          layout = Layout.create_new(f, 2, 2)
          layout.set_value(0, 0, 'BLK')
          layout.set_value(1, 0, 'WHT')
          layout.set_value(0, 1, 'BLK')
  
      export_layout(p)
  
      assert filecmp.cmp(baseline_path, p.final_path) is True
  
  
  def test_export_overwrite(tmpdir):
      baseline_path = utils.get_baseline_path('export_valid.png')
      p = utils.create_project(tmpdir, 'p', 2, 2)
      with open(p.layout_path, 'w') as f:
          layout = Layout.create_new(f, 2, 2)
          layout.set_value(0, 0, 'BLK')
          layout.set_value(1, 0, 'WHT')
          layout.set_value(0, 1, 'BLK')
  
      export_layout(p)
      export_layout(p)
  
      assert filecmp.cmp(baseline_path, p.final_path) is True
  
  
  def test_export_missing_input(tmpdir):
      p = utils.create_project(tmpdir, 'p', 2, 2)
  
      with pytest.raises(ValueError):
          export_layout(p)
  
  
  def test_export_width_mismatch(tmpdir):
      p = utils.create_project(tmpdir, 'p', 2, 2)
      with open(p.layout_path, 'w') as f:
          Layout.create_new(f, 1, 2)
  
      with pytest.raises(ValueError):
          export_layout(p)
  
  
  def test_export_height_mismatch(tmpdir):
      p = utils.create_project(tmpdir, 'p', 2, 2)
      with open(p.layout_path, 'w') as f:
          Layout.create_new(f, 2, 1)
  
      with pytest.raises(ValueError):
          export_layout(p)
  