def setUp(self):
"""Sets up shared test data files and shared instances"""
# Test data directory
self.test_dir = "{}/test_data/".format(os.path.dirname(__file__))
# Vulnerability curves
self.good_curve = "{}/good_curve.tsv".format(self.test_dir)
self.good_curve_2 = "{}/good_curve_2.tsv".format(self.test_dir)
self.bad_curve_1 = "{}/bad_curve_1.tsv".format(self.test_dir)
self.bad_curve_2 = "{}/bad_curve_2.tsv".format(self.test_dir)
# Depth files
self.good_depths = "{}/good_depths.tsv".format(self.test_dir)
self.bad_depths_1 = "{}/bad_depths_1.tsv".format(self.test_dir)
self.bad_depths_2 = "{}/bad_depths_2.tsv".format(self.test_dir)
# Test instances
self.vulnerability_curve = VulnerabilityCurve(self.good_curve)
self.vulnerability_curve_2 = VulnerabilityCurve(
self.good_curve_2, max_depth=12, bin_width=2)
self.postcode = PostCode("AA1 1AA", "Foo", 10)
self.flood_event = FloodEvent(self.good_depths, self.postcode)
self.risk = Risk(self.postcode)
self.bad_flood_event_1 = FloodEvent(self.bad_depths_1, self.postcode)
self.bad_flood_event_2 = FloodEvent(self.bad_depths_2, self.postcode)
def test_risk(self):
"""Tests the Risk class
Tests are as follows:
1. Tests the constructor with good and bad calls
2. Tests that the expected values for floods are correctly calculated
3. Tests that incorrect depth files raise suitable exceptions
"""
#
# 1. Tests the constructor with good and bad calls
with self.assertRaises(
TypeError, msg="Non-postcode instance should raise TypeError"):
Risk(None)
#
# 2. Tests that the expected values for floods are correctly calculated
self.assertAlmostEqual(
self.risk.calculate_expected_damage(
self.flood_event, self.vulnerability_curve),
10,
msg="Expected damage for this calculation should be 10")
#
# 3. Tests that incorrect depth files raise suitable exceptions
# Test bad curve value
with self.assertRaises(
TypeError,
msg="Non-vulnerability curve argument should raise TypeError"):
self.risk.calculate_expected_damage(self.flood_event, "bar")
# Test bad flood event value
with self.assertRaises(
TypeError,
msg="Non-vulnerability curve argument should raise TypeError"):
self.risk.calculate_expected_damage(
"foo", self.vulnerability_curve)
# Test non-matching flood event and risk postcodes
with self.assertRaises(
ValueError,
msg="Postcode of Risk does not match postcode of flood event"):
postcode2 = PostCode("AA2 2AA", "Bar", 10)
risk2 = Risk(postcode2)
risk2.calculate_expected_damage(
self.flood_event, self.vulnerability_curve)
# Test incorrect header in depths file
with self.assertRaises(
IOError,
msg="Incorrect header for depths file should raise IOError"):
self.risk.calculate_expected_damage(
self.bad_flood_event_1, self.vulnerability_curve)
# Test out of range value in depths file
with self.assertRaises(
ValueError,
msg="Out-of-range depth values should raise ValueError"):
self.risk.calculate_expected_damage(
self.bad_flood_event_2, self.vulnerability_curve)
class TestFloodDamage(unittest.TestCase):
"""Unit tests for the Flood Damage package"""
def setUp(self):
"""Sets up shared test data files and shared instances"""
# Test data directory
self.test_dir = "{}/test_data/".format(os.path.dirname(__file__))
# Vulnerability curves
self.good_curve = "{}/good_curve.tsv".format(self.test_dir)
self.good_curve_2 = "{}/good_curve_2.tsv".format(self.test_dir)
self.bad_curve_1 = "{}/bad_curve_1.tsv".format(self.test_dir)
self.bad_curve_2 = "{}/bad_curve_2.tsv".format(self.test_dir)
# Depth files
self.good_depths = "{}/good_depths.tsv".format(self.test_dir)
self.bad_depths_1 = "{}/bad_depths_1.tsv".format(self.test_dir)
self.bad_depths_2 = "{}/bad_depths_2.tsv".format(self.test_dir)
# Test instances
self.vulnerability_curve = VulnerabilityCurve(self.good_curve)
self.vulnerability_curve_2 = VulnerabilityCurve(
self.good_curve_2, max_depth=12, bin_width=2)
self.postcode = PostCode("AA1 1AA", "Foo", 10)
self.flood_event = FloodEvent(self.good_depths, self.postcode)
self.risk = Risk(self.postcode)
self.bad_flood_event_1 = FloodEvent(self.bad_depths_1, self.postcode)
self.bad_flood_event_2 = FloodEvent(self.bad_depths_2, self.postcode)
def test_postcode(self):
"""Tests the PostCode class
:return:
"""
#
# Test constructor with good and bad values
self.assertIsInstance(
self.flood_event, FloodEvent, msg="Expected FloodEvent object")
with self.assertRaises(
ValueError, msg="Invalid postcode should raise value error"):
self.postcode = PostCode("Foo", "Bar", 10)
with self.assertRaises(
ValueError, msg="Invalid postcode should raise value error"):
self.postcode = PostCode(1, "Bar", 10)
with self.assertRaises(
TypeError, msg="Non-string town should raise type error"):
self.postcode = PostCode("AA1 1AA", None, 10)
with self.assertRaises(
TypeError, msg="Non-int town should raise type error"):
self.postcode = PostCode("AA1 1AA", "Foo", "Bar")
def test_curve(self):
"""Tests the Vulnerability Curve classes and methods
Tests are as follows:
1. Tests that damage_from_depth function returns correct output
2. Test exceptions raised by damage_from_depth function
3. Tests suitable exceptions are raised with an invalid curve file
"""
#
# 1. Test Damage outputs from a valid curve
self.assertEqual(
self.vulnerability_curve.damage_from_depth(0), 0,
"Depth zero should return zero damage")
self.assertEqual(
self.vulnerability_curve.damage_from_depth(0.1), 10,
"Depth 0.1 should return damage = 10 with the 'good' test curve")
self.assertEqual(
self.vulnerability_curve.damage_from_depth(4), 40,
"Depth 4 should return damage = 40 with the 'good' test curve")
# Test non-standard vulnerability curve (max_depth=12, bin_width=2)
self.assertEqual(
self.vulnerability_curve_2.damage_from_depth(11.0), 120,
"Depth 11 should return damage = 120 with the second test curve")
#
# 2. Test suitable exceptions are raise with out-of-range depth values
with self.assertRaises(
ValueError, msg="Out-of-range depth should raise ValueError"):
self.vulnerability_curve.damage_from_depth(11)
with self.assertRaises(
ValueError, msg="Out-of-range depth should raise ValueError"):
self.vulnerability_curve.damage_from_depth(-1.1)
with self.assertRaises(
TypeError, msg="Non-numeric value should raise TypeError"):
self.vulnerability_curve.damage_from_depth("foo")
with self.assertRaises(
ValueError, msg="Out-of-range depth should raise ValueError"):
self.vulnerability_curve.damage_from_depth(11)
#
# 3). Tests suitable exceptions are raised with an invalid curve file
# Check test file 'bad_curve_1.tsv' exists
self.assertTrue(
os.path.isfile(self.bad_curve_1),
"Missing bad_curve_1.tsv test file")
# Check exception is raised if the expected file header is not present
with self.assertRaises(
IOError, msg="Incorrect curve file should raise IOError"):
VulnerabilityCurve(self.bad_curve_1)
# Check test file 'bad_curve_2.tsv' exists
self.assertTrue(
os.path.isfile(self.bad_curve_2),
"Missing bad_curve_2.tsv test file")
# Check exception is raised if file is incorrectly formatted
with self.assertRaises(
IOError, msg="Incorrect curve file should raise IOError"):
VulnerabilityCurve(self.bad_curve_2)
def test_flood_event(self):
"""Tests the FloodEvent classes and methods
1. Tests the constructor with good and bad calls
"""
#
# 1. Test Constructor
# Test valid call
self.assertEqual(
type(self.flood_event), FloodEvent,
msg="Expected FloodEvent instance")
with self.assertRaises(
TypeError,
msg="Incorrect postcode should raise type error"):
FloodEvent(self.good_depths, None)
with self.assertRaises(
TypeError,
msg="Incorrect depth file input should raise type error"):
FloodEvent(None, self.postcode)
with self.assertRaises(
IOError,
msg="Non-existant depth file should raise IO error"):
FloodEvent("foo", self.postcode)
def test_risk(self):
"""Tests the Risk class
Tests are as follows:
1. Tests the constructor with good and bad calls
2. Tests that the expected values for floods are correctly calculated
3. Tests that incorrect depth files raise suitable exceptions
"""
#
# 1. Tests the constructor with good and bad calls
with self.assertRaises(
TypeError, msg="Non-postcode instance should raise TypeError"):
Risk(None)
#
# 2. Tests that the expected values for floods are correctly calculated
self.assertAlmostEqual(
self.risk.calculate_expected_damage(
self.flood_event, self.vulnerability_curve),
10,
msg="Expected damage for this calculation should be 10")
#
# 3. Tests that incorrect depth files raise suitable exceptions
# Test bad curve value
with self.assertRaises(
TypeError,
msg="Non-vulnerability curve argument should raise TypeError"):
self.risk.calculate_expected_damage(self.flood_event, "bar")
# Test bad flood event value
with self.assertRaises(
TypeError,
msg="Non-vulnerability curve argument should raise TypeError"):
self.risk.calculate_expected_damage(
"foo", self.vulnerability_curve)
# Test non-matching flood event and risk postcodes
with self.assertRaises(
ValueError,
msg="Postcode of Risk does not match postcode of flood event"):
postcode2 = PostCode("AA2 2AA", "Bar", 10)
risk2 = Risk(postcode2)
risk2.calculate_expected_damage(
self.flood_event, self.vulnerability_curve)
# Test incorrect header in depths file
with self.assertRaises(
IOError,
msg="Incorrect header for depths file should raise IOError"):
self.risk.calculate_expected_damage(
self.bad_flood_event_1, self.vulnerability_curve)
# Test out of range value in depths file
with self.assertRaises(
ValueError,
msg="Out-of-range depth values should raise ValueError"):
self.risk.calculate_expected_damage(
self.bad_flood_event_2, self.vulnerability_curve)
