tests/array*: Allow to skip test if "array" is unavailable.

tests/basics/array1.py

-import array
+try:
+    import array
+except ImportError:
+    import sys
+    print("SKIP")
+    sys.exit()
 
 a = array.array('B', [1, 2, 3])
 print(a, len(a))

tests/basics/array_add.py

 # test array + array
-import array
+try:
+    import array
+except ImportError:
+    import sys
+    print("SKIP")
+    sys.exit()
 
 a1 = array.array('I', [1])
 a2 = array.array('I', [2])

tests/basics/array_construct.py

 # test construction of array.array from different objects
 
-from array import array
+try:
+    from array import array
+except ImportError:
+    import sys
+    print("SKIP")
+    sys.exit()
 
 # tuple, list
 print(array('b', (1, 2)))

tests/basics/array_construct2.py

-from array import array
+try:
+    from array import array
+except ImportError:
+    import sys
+    print("SKIP")
+    sys.exit()
 
 # construct from something with unknown length (requires generators)
 print(array('i', (i for i in range(10))))

tests/basics/array_construct_endian.py

 # test construction of array.array from different objects
 
-from array import array
+try:
+    from array import array
+except ImportError:
+    import sys
+    print("SKIP")
+    sys.exit()
 
 # raw copy from bytes, bytearray
 print(array('h', b'12'))

tests/basics/array_q.py

 # test array('q') and array('Q')
 
-from array import array
+try:
+    from array import array
+except ImportError:
+    import sys
+    print("SKIP")
+    sys.exit()
 
 print(array('q'))
 print(array('Q'))