mirror of
https://github.com/vlang/v.git
synced 2023-08-10 21:13:21 +03:00
87 lines
2.2 KiB
V
87 lines
2.2 KiB
V
import big
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fn test_new_big(){
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n := big.new()
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assert sizeof( big.Number ) == 128
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assert n.hexstr() == '0'
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}
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fn test_from_int(){
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assert big.from_int(255).hexstr() == 'ff'
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assert big.from_int(127).hexstr() == '7f'
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assert big.from_int(1024).hexstr() == '400'
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assert big.from_int(2147483647).hexstr() == '7fffffff'
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assert big.from_int(-1).hexstr() == 'ffffffffffffffff'
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}
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fn test_from_u64(){
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assert big.from_u64(255).hexstr() == 'ff'
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assert big.from_u64(127).hexstr() == '7f'
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assert big.from_u64(1024).hexstr() == '400'
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assert big.from_u64(4294967295).hexstr() == 'ffffffff'
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assert big.from_u64(4398046511104).hexstr() == '40000000000'
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assert big.from_u64(-1).hexstr() == 'ffffffffffffffff'
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}
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fn test_plus(){
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a := big.from_u64(2)
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b := big.from_u64(3)
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c := a + b
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assert c.hexstr() == '5'
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assert (big.from_u64(1024) + big.from_u64(1024)).hexstr() == '800'
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}
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fn test_minus(){
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a := big.from_u64(2)
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b := big.from_u64(3)
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c := b - a
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assert c.hexstr() == '1'
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e := big.from_u64(1024)
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ee := e - e
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assert ee.hexstr() == '0'
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}
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fn test_divide(){
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a := big.from_u64(2)
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b := big.from_u64(3)
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c := b / a
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assert c.hexstr() == '1'
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assert (b % a ).hexstr() == '1'
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e := big.from_u64(1024) // dec(1024) == hex(0x400)
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ee := e / e
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assert ee.hexstr() == '1'
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assert (e / a).hexstr() == '200'
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assert (e / (a*a)).hexstr() == '100'
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}
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fn test_multiply(){
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a := big.from_u64(2)
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b := big.from_u64(3)
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c := b * a
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assert c.hexstr() == '6'
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e := big.from_u64(1024)
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e2 := e * e
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e4 := e2 * e2
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e8 := e2 * e2 * e2 * e2
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e9 := e8 + big.from_u64(1)
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d := ((e9 * e9) + b) * c
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assert e4.hexstr() == '10000000000'
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assert e8.hexstr() == '100000000000000000000'
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assert e9.hexstr() == '100000000000000000001'
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assert d.hexstr() == '60000000000000000000c00000000000000000018'
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}
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fn test_mod(){
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assert (big.from_u64(13) % big.from_u64(10) ).int() == 3
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assert (big.from_u64(13) % big.from_u64(9) ).int() == 4
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assert (big.from_u64(7) % big.from_u64(5) ).int() == 2
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}
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fn test_factorial(){
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f5 := big.factorial( big.from_u64(5) )
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assert f5.hexstr() == '78'
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f100 := big.factorial( big.from_u64(100) )
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assert f100.hexstr() == '1b30964ec395dc24069528d54bbda40d16e966ef9a70eb21b5b2943a321cdf10391745570cca9420c6ecb3b72ed2ee8b02ea2735c61a000000000000000000000000'
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}
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