def test_grabPropsTempAndPressure(self):
database = db.DataBase(NIST_PATH)
result = database.grabProps(5, T=273, P=1)
assert result["T"] == 273
assert result["P"] == pytest.approx(451.08, rel=1e-4)
assert result["rho_L_NIST"] == pytest.approx(907.827, rel=1e-4)
assert result["h_L_NIST"] == pytest.approx(165.2363, rel=1e-4)
assert result["s_L_NIST"] == pytest.approx(0.7137, rel=1e-4)
assert result["rho_V_NIST"] == pytest.approx(84.7932, rel=1e-4)
assert result["h_V_NIST"] == pytest.approx(398.3009, rel=1e-4)
assert result["s_V_NIST"] == pytest.approx(1.5674, rel=1e-4)
assert result["X"] == pytest.approx(3.7412, rel=1e-4)
assert result["h"] == pytest.approx(1037.1684, rel=1e-4)
assert result["s"] == pytest.approx(3.9074, rel=1e-4)
def test_grabPropsNoTempOrPressure(self):
database = db.DataBase(NIST_PATH)
assert pytest.raises(ValueError, database.grabProps, 5, None, None)
def test_grabPropsInvalidRho(self):
database = db.DataBase(NIST_PATH)
assert pytest.raises(ValueError, database.grabProps, 0, 273, None)