tests/basics: Improve mpz test coverage.

tests/basics/int_big_rshift.py

@@ -4,3 +4,4 @@ print(i >> 1000)
 
 # result needs rounding up
 print(-(1<<70) >> 80)
+print(-0xffffffffffffffff >> 32)

tests/basics/int_big_xor.py

@@ -19,6 +19,7 @@ print((-a) ^ (1 << 100))
 print((-a) ^ (1 << 200))
 print((-a) ^ a == 0)
 print(bool((-a) ^ a))
+print(-1 ^ 0xffffffffffffffff) # carry overflows to higher digit
 
 # test + - 
 

tests/basics/int_mpz.py

@@ -7,6 +7,8 @@ y = 2000000000000000000000000000000
 # printing
 print(x)
 print(y)
+print('%#X' % (x - x)) # print prefix
+print('{:#,}'.format(x)) # print with commas
 
 # addition
 print(x + 1)
@@ -67,6 +69,12 @@ print(int("-123456789012345678901234567890"))
 print(int("123456789012345678901234567890abcdef", 16))
 print(int("123456789012345678901234567890ABCDEF", 16))
 
+# invalid characters in string
+try:
+    print(int("123456789012345678901234567890abcdef"))
+except ValueError:
+    print('ValueError');
+
 # test constant integer with more than 255 chars
 x = 0x84ce72aa8699df436059f052ac51b6398d2511e49631bcb7e71f89c499b9ee425dfbc13a5f6d408471b054f2655617cbbaf7937b7c80cd8865cf02c8487d30d2b0fbd8b2c4e102e16d828374bbc47b93852f212d5043c3ea720f086178ff798cc4f63f787b9c2e419efa033e7644ea7936f54462dc21a6c4580725f7f0e7d1aaaaaaa
 print(x)