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test_seach_and_rescue.py
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test_seach_and_rescue.py
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from StringIO import StringIO
from unittest import TestCase, main
from search_and_rescue import load_sea_grid, value_at, valid_cells_from, max_path, max_cell, sum_path
class TestSeachAndRescue(TestCase):
def testLoadSeaGrid(self):
fobj = StringIO("""
0,1,2
4,3,2
""")
expected = [
[0, 1, 2],
[4, 3, 2],
]
actual = load_sea_grid(fobj)
self.assertEqual(expected, actual)
def testValueAt(self):
grid = [
[1, 2, 4],
[3, 5, 6],
[3, 5, 6],
]
expected = 5
cell = (1, 0)
actual = value_at(grid, cell)
self.assertEqual(expected, actual)
def test_valid_cells_from_center(self):
grid = [
[1, 2, 4],
[3, 5, 6],
[7, 8, 9],
]
current_xy = (1,1)
self.assertEqual(5, value_at(grid, current_xy))
seen_cells = []
expected = [ (0, 1), (1, 0), (2, 1), (1, 2) ]
actual = valid_cells_from(current_xy, seen_cells, len(grid))
self.assertEqual(sorted(expected), sorted(actual))
def test_valid_cells_from_left_edge(self):
grid = [
[1, 2, 4],
[3, 5, 6],
[7, 8, 9],
]
current_xy = (0,1)
self.assertEqual(3, value_at(grid, current_xy))
seen_cells = []
expected = [ (0, 0), (0, 2), (1, 1) ]
actual = valid_cells_from(current_xy, seen_cells, len(grid))
self.assertEqual(sorted(expected), sorted(actual))
def test_valid_cells_from_right_edge(self):
grid = [
[1, 2, 4],
[3, 5, 6],
[7, 8, 9],
]
current_xy = (2,1)
self.assertEqual(6, value_at(grid, current_xy))
seen_cells = []
expected = [ (2, 0), (1, 1), (2, 2) ]
actual = valid_cells_from(current_xy, seen_cells, len(grid))
self.assertEqual(sorted(expected), sorted(actual))
def test_valid_cells_from_top_edge(self):
grid = [
[1, 2, 4],
[3, 5, 6],
[7, 8, 9],
]
current_xy = (1,2)
self.assertEqual(2, value_at(grid, current_xy))
seen_cells = []
expected = [ (0, 2), (1, 1), (2, 2) ]
actual = valid_cells_from(current_xy, seen_cells, len(grid))
self.assertEqual(sorted(expected), sorted(actual))
def test_valid_cells_from_bottom_edge(self):
grid = [
[1, 2, 4],
[3, 5, 6],
[7, 8, 9],
]
current_xy = (1,0)
self.assertEqual(8, value_at(grid, current_xy))
seen_cells = []
expected = [ (0, 0), (1, 1), (2, 0) ]
actual = valid_cells_from(current_xy, seen_cells, len(grid))
self.assertEqual(sorted(expected), sorted(actual))
def test_valid_cells_seen_cells_excluded(self):
grid = [
[1, 2, 4],
[3, 5, 6],
[7, 8, 9],
]
current_xy = (1,0)
self.assertEqual(8, value_at(grid, current_xy))
seen_cells = [(1, 1)]
expected = [ (0, 0), (2, 0) ]
actual = valid_cells_from(current_xy, seen_cells, len(grid))
self.assertEqual(sorted(expected), sorted(actual))
def test_max_path(self):
grid = [
[1, 2, 4],
[3, 5, 6],
[7, 8, 9],
]
paths = [
[ (0,0), (0,1), (0,2) ],
[ (0,0), (1,0), (2,0) ],
]
expected = [ (0,0), (1,0), (2,0) ]
actual = max_path(grid, paths)
self.assertEqual(expected, actual)
def test_max_path_all_zero(self):
grid = [
[0, 0, 0],
[0, 0, 0],
[0, 0, 0],
]
paths = [
[ (0,0), (0,1), (0,2) ],
[ (0,0), (1,0), (2,0) ],
]
expected = [ (0,0), (1,0), (2,0) ]
actual = max_path(grid, paths)
self.assertEqual(expected, actual)
def test_max_cell(self):
grid = [
[1, 2, 4],
[3, 5, 6],
[7, 8, 9],
]
cells = [(0,0), (1,0), (2,0)]
expected = (2,0)
self.assertEqual(9, value_at(grid, expected))
actual = max_cell(grid, cells)
self.assertEqual(expected, actual)
def test_max_cell_all_zero(self):
"""Handle when the max value of any of the cells is zero"""
grid = [
[1, 5, 4],
[3, 5, 6],
[0, 0, 0],
]
cells = [(0,0), (1,0), (2,0)]
expected = (2,0)
actual = max_cell(grid, cells)
self.assertEqual(expected, actual)
def test_sum_path(self):
grid = [
[1, 2, 4],
[3, 5, 6],
[7, 8, 9],
]
path = [(0,0), (1,0), (2,0)]
expected = 24
actual = sum_path(grid, path)
self.assertEqual(expected, actual)
if __name__ == '__main__':
main()