def test_overlapping_with_cascading_resolver():
# expect resolver to be called with the overlapping pairs
non_local = { 'resolver called': False }
def resolver(key, a_value, b_value):
non_local['resolver called'] = True
return {'foo': a_value + b_value}
cascade_overlapping = merge(BASE, OVERLAPPING_SAME, resolver)
assert non_local['resolver called']
assert 'FOO' in cascade_overlapping['foo']
assert 'BARBAR' in cascade_overlapping['foo']
def test_overlapping_with_del_resolver():
# expect resolver to be called with the overlapping pairs
non_local = { 'resolver called': False }
def resolver(key, a_value, b_value):
non_local['resolver called'] = True
assert key == 'bar'
assert a_value == 'BAR'
assert b_value == 'BAR'
return {}
assert merge(BASE, OVERLAPPING_SAME, resolver) == DEL_OVERLAPPING
assert non_local['resolver called']
def test_wrong_types():
'''expect actionable error messages'''
with pytest.raises(TypeError):
merge(1, dict())
with pytest.raises(TypeError):
merge(dict(), 2)
with pytest.raises(TypeError):
merge(dict(), dict(), 1)
def test_recursive():
# expect dictionaries to be combined recursively
first = {
'a': {'all': 'azure'},
'b': {'boss': 'balance', 2: 22}
}
second = {
'a': {1: 1},
'b': {2:22},
'c': {'carp': 'careen', 3:333, 'III': 'aye aye aye'}
}
combined = {
'a': {'all': 'azure', 1: 1},
'b': {'boss': 'balance', 2: 22},
'c': {'carp': 'careen', 3:333, 'III': 'aye aye aye'}
}
assert merge(first, second) == combined
def mergeAll(array):
merged = {}
for x in array:
merged = merge(merged, x)
return merged
def test_overlapping_different():
# expect an exception
with pytest.raises(KeyConflictError):
merge(BASE, OVERLAPPING_DIFFERENT)
def test_overlapping_same():
# expect the overlap to resolve to a single copy of the overlapping key/value
assert merge(BASE, OVERLAPPING_SAME) == BASE_NON_OVERLAPPING
def test_non_overlapping():
# expect a straightforward merge
assert merge(BASE, NON_OVERLAPPING) == BASE_NON_OVERLAPPING
def test_no_resolver():
'''expect a KeyConflictError'''
with pytest.raises(KeyConflictError):
merge(BASE, OVERLAPPING_SAME, None)
