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# test slice assignment to memoryview
try:
memoryview(bytearray(1))[:] = memoryview(bytearray(1))
except (NameError, TypeError):
print("SKIP")
raise SystemExit
try:
import uarray as array
except ImportError:
try:
import array
except ImportError:
print("SKIP")
raise SystemExit
# test slice assignment between memoryviews
b1 = bytearray(b'1234')
b2 = bytearray(b'5678')
b3 = bytearray(b'5678')
m1 = memoryview(b1)
m2 = memoryview(b2)
m3 = memoryview(b3)
m2[1:3] = m1[0:2]
print(b2)
b3[1:3] = m1[0:2]
print(b3)
m1[2:4] = b3[1:3]
print(b1)
# invalid slice assignments
try:
m2[1:3] = b1[0:4]
except ValueError:
print("ValueError")
try:
m2[1:3] = m1[0:4]
except ValueError:
print("ValueError")
try:
m2[0:4] = m1[1:3]
except ValueError:
print("ValueError")
# test memoryview of arrays with items sized larger than 1
a1 = array.array('i', [0]*5)
m4 = memoryview(a1)
a2 = array.array('i', [3]*5)
m5 = memoryview(a2)
m4[1:3] = m5[1:3]
print(a1)
try:
m4[1:3] = m2[1:3]
except ValueError:
print("ValueError")
# invalid assignment on RHS
try:
memoryview(array.array('i'))[0:2] = b'1234'
except ValueError:
print('ValueError')
# test shift left of bytearray
b = bytearray(range(10))
mv = memoryview(b)
mv[1:] = mv[:-1]
print(b)
# test shift right of bytearray
b = bytearray(range(10))
mv = memoryview(b)
mv[:-1] = mv[1:]
print(b)
# test shift left of array
a = array.array('I', range(10))
mv = memoryview(a)
mv[1:] = mv[:-1]
print(a)
# test shift right of array
a = array.array('I', range(10))
mv = memoryview(a)
mv[:-1] = mv[1:]
print(a)
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