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| 1 | +"""Unit tests for grid export functionality.""" |
| 2 | + |
| 3 | +import tempfile |
| 4 | +from pathlib import Path |
| 5 | +from unittest.mock import MagicMock |
| 6 | + |
| 7 | +import numpy as np |
| 8 | +import pytest |
| 9 | + |
| 10 | + |
| 11 | +def test_export_grid_ascii_basic(): |
| 12 | + """Test ASCII export of a simple grid with scalar data.""" |
| 13 | + # Create a mock mesh object that simulates a PyVista UniformGrid |
| 14 | + mock_mesh = MagicMock() |
| 15 | + mock_mesh.n_cells = 8 |
| 16 | + |
| 17 | + # Mock cell centers |
| 18 | + mock_cell_centers = MagicMock() |
| 19 | + mock_cell_centers.points = np.array([ |
| 20 | + [0.5, 0.5, 0.5], |
| 21 | + [1.5, 0.5, 0.5], |
| 22 | + [0.5, 1.5, 0.5], |
| 23 | + [1.5, 1.5, 0.5], |
| 24 | + [0.5, 0.5, 1.5], |
| 25 | + [1.5, 0.5, 1.5], |
| 26 | + [0.5, 1.5, 1.5], |
| 27 | + [1.5, 1.5, 1.5], |
| 28 | + ]) |
| 29 | + mock_mesh.cell_centers.return_value = mock_cell_centers |
| 30 | + |
| 31 | + # Mock scalar data |
| 32 | + mock_mesh.active_scalars_name = "scalar_field" |
| 33 | + mock_mesh.cell_data = { |
| 34 | + "scalar_field": np.array([1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0]) |
| 35 | + } |
| 36 | + |
| 37 | + # Create a temporary file for export |
| 38 | + with tempfile.NamedTemporaryFile(mode='w', suffix='.txt', delete=False) as f: |
| 39 | + temp_path = f.name |
| 40 | + |
| 41 | + try: |
| 42 | + # Import the ObjectListWidget to get the export method |
| 43 | + # We'll test the export method in isolation |
| 44 | + from loopstructural.gui.visualisation.object_list_widget import ObjectListWidget |
| 45 | + |
| 46 | + # Create a minimal instance (viewer and properties_widget can be None for this test) |
| 47 | + widget = ObjectListWidget(viewer=MagicMock(), properties_widget=None) |
| 48 | + |
| 49 | + # Call the export method |
| 50 | + widget._export_grid_ascii(mock_mesh, temp_path, "test_grid") |
| 51 | + |
| 52 | + # Read the exported file |
| 53 | + with open(temp_path, 'r') as f: |
| 54 | + lines = f.readlines() |
| 55 | + |
| 56 | + # Verify header |
| 57 | + assert lines[0].strip() == "# ASCII Grid Export: test_grid" |
| 58 | + assert lines[1].strip() == "# Format: x y z value" |
| 59 | + assert lines[2].strip() == "# Number of cells: 8" |
| 60 | + assert lines[3].strip() == "# Scalar field: scalar_field" |
| 61 | + assert lines[4].strip() == "#" |
| 62 | + |
| 63 | + # Verify data lines |
| 64 | + data_lines = lines[5:] |
| 65 | + assert len(data_lines) == 8 |
| 66 | + |
| 67 | + # Verify first data line |
| 68 | + first_line = data_lines[0].strip().split() |
| 69 | + assert len(first_line) == 4 |
| 70 | + assert float(first_line[0]) == pytest.approx(0.5, abs=1e-5) |
| 71 | + assert float(first_line[1]) == pytest.approx(0.5, abs=1e-5) |
| 72 | + assert float(first_line[2]) == pytest.approx(0.5, abs=1e-5) |
| 73 | + assert float(first_line[3]) == pytest.approx(1.0, abs=1e-5) |
| 74 | + |
| 75 | + finally: |
| 76 | + # Clean up |
| 77 | + Path(temp_path).unlink(missing_ok=True) |
| 78 | + |
| 79 | + |
| 80 | +def test_export_grid_ascii_no_scalars(): |
| 81 | + """Test ASCII export when grid has no scalar data.""" |
| 82 | + # Create a mock mesh without scalar data |
| 83 | + mock_mesh = MagicMock() |
| 84 | + mock_mesh.n_cells = 4 |
| 85 | + |
| 86 | + mock_cell_centers = MagicMock() |
| 87 | + mock_cell_centers.points = np.array([ |
| 88 | + [0.5, 0.5, 0.5], |
| 89 | + [1.5, 0.5, 0.5], |
| 90 | + [0.5, 1.5, 0.5], |
| 91 | + [1.5, 1.5, 0.5], |
| 92 | + ]) |
| 93 | + mock_mesh.cell_centers.return_value = mock_cell_centers |
| 94 | + |
| 95 | + # No scalar data |
| 96 | + mock_mesh.active_scalars_name = None |
| 97 | + mock_mesh.cell_data = {} |
| 98 | + |
| 99 | + with tempfile.NamedTemporaryFile(mode='w', suffix='.txt', delete=False) as f: |
| 100 | + temp_path = f.name |
| 101 | + |
| 102 | + try: |
| 103 | + from loopstructural.gui.visualisation.object_list_widget import ObjectListWidget |
| 104 | + |
| 105 | + widget = ObjectListWidget(viewer=MagicMock(), properties_widget=None) |
| 106 | + widget._export_grid_ascii(mock_mesh, temp_path, "test_grid_no_scalars") |
| 107 | + |
| 108 | + with open(temp_path, 'r') as f: |
| 109 | + lines = f.readlines() |
| 110 | + |
| 111 | + # Should still create file with zeros |
| 112 | + assert "# ASCII Grid Export: test_grid_no_scalars" in lines[0] |
| 113 | + assert len(lines) >= 9 # Header + 4 data lines |
| 114 | + |
| 115 | + # Verify that values are zero |
| 116 | + data_lines = lines[5:] |
| 117 | + for line in data_lines: |
| 118 | + if line.strip(): |
| 119 | + parts = line.strip().split() |
| 120 | + if len(parts) == 4: |
| 121 | + value = float(parts[3]) |
| 122 | + assert value == pytest.approx(0.0, abs=1e-5) |
| 123 | + |
| 124 | + finally: |
| 125 | + Path(temp_path).unlink(missing_ok=True) |
| 126 | + |
| 127 | + |
| 128 | +def test_mesh_type_detection(): |
| 129 | + """Test that grid mesh types are correctly detected.""" |
| 130 | + test_cases = [ |
| 131 | + ("UniformGrid", True), |
| 132 | + ("ImageData", True), |
| 133 | + ("StructuredGrid", True), |
| 134 | + ("RectilinearGrid", True), |
| 135 | + ("PolyData", False), |
| 136 | + ("UnstructuredGrid", False), |
| 137 | + ] |
| 138 | + |
| 139 | + for mesh_type, expected_is_grid in test_cases: |
| 140 | + mock_mesh = MagicMock() |
| 141 | + mock_mesh.__class__.__name__ = mesh_type |
| 142 | + |
| 143 | + is_grid = type(mock_mesh).__name__ in ['UniformGrid', 'ImageData', 'StructuredGrid', 'RectilinearGrid'] |
| 144 | + |
| 145 | + assert is_grid == expected_is_grid, f"Failed for mesh type: {mesh_type}" |
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