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Add more tests to test_csp.py #326

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Mar 7, 2017
Merged

Add more tests to test_csp.py #326

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118 changes: 118 additions & 0 deletions tests/test_csp.py
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Original file line number Diff line number Diff line change
Expand Up @@ -43,11 +43,129 @@ def test_csp_actions():
state = {'A': '1', 'C': '2'}
assert map_coloring_test.actions(state) == [('B', '3')]

state = (('A', '1'), ('B', '3'))
assert map_coloring_test.actions(state) == [('C', '2')]

state = {'A': '1'}
assert (map_coloring_test.actions(state) == [('C', '2'), ('C', '3')] or
map_coloring_test.actions(state) == [('B', '2'), ('B', '3')])


def test_csp_result():
map_coloring_test = MapColoringCSP(list('123'), 'A: B C; B: C; C: ')

state = (('A', '1'), ('B', '3'))
action = ('C', '2')

assert map_coloring_test.result(state, action) == (('A', '1'), ('B', '3'), ('C', '2'))


def test_csp_goal_test():
map_coloring_test = MapColoringCSP(list('123'), 'A: B C; B: C; C: ')
state = (('A', '1'), ('B', '3'), ('C', '2'))
assert map_coloring_test.goal_test(state) is True

state = (('A', '1'), ('C', '2'))
assert map_coloring_test.goal_test(state) is False


def test_csp_support_pruning():
map_coloring_test = MapColoringCSP(list('123'), 'A: B C; B: C; C: ')
map_coloring_test.support_pruning()
assert map_coloring_test.curr_domains == {'A': ['1', '2', '3'], 'B': ['1', '2', '3'],
'C': ['1', '2', '3']}


def test_csp_suppose():
map_coloring_test = MapColoringCSP(list('123'), 'A: B C; B: C; C: ')
var = 'A'
value = '1'

removals = map_coloring_test.suppose(var, value)

assert removals == [('A', '2'), ('A', '3')]
assert map_coloring_test.curr_domains == {'A': ['1'], 'B': ['1', '2', '3'],
'C': ['1', '2', '3']}


def test_csp_prune():
map_coloring_test = MapColoringCSP(list('123'), 'A: B C; B: C; C: ')
removals = None
var = 'A'
value = '3'

map_coloring_test.support_pruning()
map_coloring_test.prune(var, value, removals)
assert map_coloring_test.curr_domains == {'A': ['1', '2'], 'B': ['1', '2', '3'],
'C': ['1', '2', '3']}
assert removals is None

map_coloring_test = MapColoringCSP(list('123'), 'A: B C; B: C; C: ')
removals = [('A', '2')]
map_coloring_test.support_pruning()
map_coloring_test.prune(var, value, removals)
assert map_coloring_test.curr_domains == {'A': ['1', '2'], 'B': ['1', '2', '3'],
'C': ['1', '2', '3']}
assert removals == [('A', '2'), ('A', '3')]


def test_csp_choices():
map_coloring_test = MapColoringCSP(list('123'), 'A: B C; B: C; C: ')
var = 'A'
assert map_coloring_test.choices(var) == ['1', '2', '3']

map_coloring_test.support_pruning()
removals = None
value = '3'
map_coloring_test.prune(var, value, removals)
assert map_coloring_test.choices(var) == ['1', '2']


def test_csp_infer_assignement():
map_coloring_test = MapColoringCSP(list('123'), 'A: B C; B: C; C: ')
map_coloring_test.infer_assignment() == {}

var = 'A'
value = '3'
map_coloring_test.prune(var, value, None)
value = '1'
map_coloring_test.prune(var, value, None)

map_coloring_test.infer_assignment() == {'A': '2'}


def test_csp_restore():
map_coloring_test = MapColoringCSP(list('123'), 'A: B C; B: C; C: ')
map_coloring_test.curr_domains = {'A': ['2', '3'], 'B': ['1'], 'C': ['2', '3']}
removals = [('A', '1'), ('B', '2'), ('B', '3')]

map_coloring_test.restore(removals)

assert map_coloring_test.curr_domains == {'A': ['2', '3', '1'], 'B': ['1', '2', '3'],
'C': ['2', '3']}


def test_csp_conflicted_vars():
map_coloring_test = MapColoringCSP(list('123'), 'A: B C; B: C; C: ')

current = {}
var = 'A'
val = '1'
map_coloring_test.assign(var, val, current)

var = 'B'
val = '3'
map_coloring_test.assign(var, val, current)

var = 'C'
val = '3'
map_coloring_test.assign(var, val, current)

conflicted_vars = map_coloring_test.conflicted_vars(current)

assert (conflicted_vars == ['B', 'C'] or conflicted_vars == ['C', 'B'])


def test_backtracking_search():
assert backtracking_search(australia)
assert backtracking_search(australia, select_unassigned_variable=mrv)
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