198 lines
6.7 KiB
Python
198 lines
6.7 KiB
Python
"""Tests for LoadingCondition feature."""
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import pytest
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import json
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import tempfile
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from pathlib import Path
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class TestMassCategory:
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"""Tests for MassCategory enum."""
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def test_create_categories(self):
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from navaltoolbox import MassCategory
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ls = MassCategory.lightship()
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dw = MassCategory.deadweight()
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ot = MassCategory.other()
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assert repr(ls) # Should not raise
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assert repr(dw)
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assert repr(ot)
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class TestMassItem:
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"""Tests for MassItem class."""
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def test_create_with_defaults(self):
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from navaltoolbox import MassItem
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item = MassItem("Test", 1000.0, (10.0, 0.0, 5.0))
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assert item.name == "Test"
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assert item.mass == 1000.0
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assert item.cog == (10.0, 0.0, 5.0)
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def test_create_with_category(self):
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from navaltoolbox import MassItem, MassCategory
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item = MassItem("Lightship", 5_000_000.0, (45.0, 0.0, 4.5), MassCategory.lightship())
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assert item.name == "Lightship"
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assert item.mass == 5_000_000.0
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class TestLoadingCondition:
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"""Tests for LoadingCondition class."""
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def test_create(self):
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from navaltoolbox import LoadingCondition
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lc = LoadingCondition("Test Loading")
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assert lc.name == "Test Loading"
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assert lc.num_masses() == 0
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assert lc.num_tank_overrides() == 0
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def test_add_masses(self):
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from navaltoolbox import LoadingCondition, MassCategory
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lc = LoadingCondition("Test")
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lc.add_mass_simple("Lightship", 5_000_000, (45.0, 0.0, 4.5), MassCategory.lightship())
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lc.add_mass_simple("Crew", 3_000, (35.0, 0.0, 8.0))
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assert lc.num_masses() == 2
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masses = lc.get_masses()
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assert len(masses) == 2
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assert masses[0].name == "Lightship"
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assert masses[1].name == "Crew"
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def test_remove_mass(self):
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from navaltoolbox import LoadingCondition
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lc = LoadingCondition("Test")
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lc.add_mass_simple("A", 1000, (0.0, 0.0, 0.0))
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lc.add_mass_simple("B", 2000, (0.0, 0.0, 0.0))
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assert lc.num_masses() == 2
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assert lc.remove_mass("A") == True
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assert lc.num_masses() == 1
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assert lc.remove_mass("X") == False
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def test_tank_fill_overrides(self):
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from navaltoolbox import LoadingCondition
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lc = LoadingCondition("Test")
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lc.set_tank_fill_percent("FO_1P", 95.0)
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lc.set_tank_fill("FW_1", 0.5)
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assert lc.num_tank_overrides() == 2
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fills = lc.get_tank_fills()
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assert abs(fills["FO_1P"] - 0.95) < 1e-6
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assert abs(fills["FW_1"] - 0.5) < 1e-6
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def test_apply_and_resolve(self):
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"""Test apply/resolve with a vessel that has tanks."""
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from navaltoolbox import LoadingCondition, Hull, Vessel, Tank
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hull = Hull.from_box(length=100.0, breadth=20.0, depth=10.0)
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vessel = Vessel(hull)
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# Add a tank: 10x10x2 = 200 m³, density 1000 kg/m³
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tank = Tank.from_box("FO_1P", 20.0, 30.0, -5.0, 5.0, 0.0, 2.0, 1000.0)
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tank.fill_percent = 0.0 # Start empty
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vessel.add_tank(tank)
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lc = LoadingCondition("Test")
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lc.add_mass_simple("Lightship", 100_000, (50.0, 0.0, 5.0))
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lc.set_tank_fill_percent("FO_1P", 50.0)
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# Apply and resolve
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lc.apply(vessel)
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# Tank should now be 50% filled
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tanks = vessel.get_tanks()
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assert abs(tanks[0].fill_percent - 50.0) < 1e-6
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disp, cog = lc.resolve(vessel)
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# Total = 100_000 + tank_mass (~100_000 kg for 100m³ at 1000 kg/m³)
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assert disp > 100_000 # Must include tank mass
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assert cog[0] > 0 # LCG should be positive
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def test_unaffected_tanks_keep_fill(self):
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"""Tanks not in the override list must keep their current fill."""
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from navaltoolbox import LoadingCondition, Hull, Vessel, Tank
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hull = Hull.from_box(length=100.0, breadth=20.0, depth=10.0)
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vessel = Vessel(hull)
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tank1 = Tank.from_box("FO_1P", 20.0, 30.0, -5.0, 0.0, 0.0, 2.0, 1000.0)
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tank1.fill_percent = 80.0
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vessel.add_tank(tank1)
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tank2 = Tank.from_box("FW_1", 40.0, 50.0, -5.0, 5.0, 0.0, 2.0, 1000.0)
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tank2.fill_percent = 60.0
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vessel.add_tank(tank2)
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# Only override FO_1P, FW_1 should stay at 60%
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lc = LoadingCondition("Test")
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lc.add_mass_simple("Lightship", 100_000, (50.0, 0.0, 5.0))
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lc.set_tank_fill_percent("FO_1P", 10.0)
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lc.apply(vessel)
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tanks = vessel.get_tanks()
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assert abs(tanks[0].fill_percent - 10.0) < 1e-6 # FO_1P changed
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assert abs(tanks[1].fill_percent - 60.0) < 1e-6 # FW_1 unchanged
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def test_json_serialization(self):
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"""Test JSON round-trip."""
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from navaltoolbox import LoadingCondition, MassCategory
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lc = LoadingCondition("Departure")
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lc.add_mass_simple("Lightship", 5_000_000, (45.0, 0.0, 4.5), MassCategory.lightship())
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lc.add_mass_simple("Crew", 3_000, (35.0, 0.0, 8.0))
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lc.set_tank_fill_percent("FO_1P", 95.0)
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lc.set_tank_fill("FW_1", 0.5)
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# Serialize
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json_str = lc.to_json()
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data = json.loads(json_str)
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assert data["name"] == "Departure"
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assert len(data["masses"]) == 2
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assert "FO_1P" in data["tank_fills"]
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# Deserialize
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lc2 = LoadingCondition.from_json(json_str)
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assert lc2.name == "Departure"
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assert lc2.num_masses() == 2
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assert lc2.num_tank_overrides() == 2
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def test_json_file_io(self):
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"""Test JSON file save/load."""
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from navaltoolbox import LoadingCondition
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lc = LoadingCondition("Test File")
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lc.add_mass_simple("Test", 1000.0, (10.0, 0.0, 5.0))
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with tempfile.NamedTemporaryFile(suffix=".json", delete=False) as f:
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path = f.name
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try:
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lc.save_json(path)
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lc2 = LoadingCondition.load_json(path)
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assert lc2.name == "Test File"
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assert lc2.num_masses() == 1
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finally:
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Path(path).unlink(missing_ok=True)
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def test_copy(self):
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"""Test copy with optional new name."""
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from navaltoolbox import LoadingCondition
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lc = LoadingCondition("Original")
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lc.add_mass_simple("A", 1000, (0.0, 0.0, 0.0))
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lc.set_tank_fill_percent("FO_1P", 95.0)
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# Copy without name -> keeps original
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lc2 = lc.copy()
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assert lc2.name == "Original"
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assert lc2.num_masses() == 1
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# Copy with new name
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lc3 = lc.copy("Arrival")
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assert lc3.name == "Arrival"
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assert lc3.num_masses() == 1
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assert lc3.num_tank_overrides() == 1
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def test_set_name(self):
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from navaltoolbox import LoadingCondition
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lc = LoadingCondition("Original")
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lc.name = "Modified"
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assert lc.name == "Modified"
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