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72 lines
2.0 KiB
Nim
72 lines
2.0 KiB
Nim
import hashes
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block hashes:
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block hashing:
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var dummy = 0.0
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doAssert hash(dummy) == hash(-dummy)
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# "VM and runtime should make the same hash value (hashIdentity)"
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block:
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const hi123 = hashIdentity(123)
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doAssert hashIdentity(123) == hi123
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# "VM and runtime should make the same hash value (hashWangYi1)"
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block:
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const wy123 = hashWangYi1(123)
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doAssert hashWangYi1(123) == wy123
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# "hashIdentity value incorrect at 456"
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block:
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doAssert hashIdentity(456) == 456
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# "hashWangYi1 value incorrect at 456"
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block:
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when Hash.sizeof < 8:
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doAssert hashWangYi1(456) == 1293320666
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else:
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doAssert hashWangYi1(456) == -6421749900419628582
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block empty:
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var
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a = ""
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b = newSeq[char]()
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c = newSeq[int]()
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d = cstring""
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e = "abcd"
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doAssert hash(a) == 0
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doAssert hash(b) == 0
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doAssert hash(c) == 0
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doAssert hash(d) == 0
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doAssert hashIgnoreCase(a) == 0
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doAssert hashIgnoreStyle(a) == 0
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doAssert hash(e, 3, 2) == 0
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block sameButDifferent:
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doAssert hash("aa bb aaaa1234") == hash("aa bb aaaa1234", 0, 13)
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doAssert hash("aa bb aaaa1234") == hash(cstring"aa bb aaaa1234")
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doAssert hashIgnoreCase("aA bb aAAa1234") == hashIgnoreCase("aa bb aaaa1234")
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doAssert hashIgnoreStyle("aa_bb_AAaa1234") == hashIgnoreCase("aaBBAAAa1234")
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block smallSize: # no multibyte hashing
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let
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xx = @['H', 'i']
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ii = @[72'u8, 105]
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ss = "Hi"
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doAssert hash(xx) == hash(ii)
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doAssert hash(xx) == hash(ss)
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doAssert hash(xx) == hash(xx, 0, xx.high)
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doAssert hash(ss) == hash(ss, 0, ss.high)
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block largeSize: # longer than 4 characters
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let
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xx = @['H', 'e', 'l', 'l', 'o']
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xxl = @['H', 'e', 'l', 'l', 'o', 'w', 'e', 'e', 'n', 's']
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ssl = "Helloweens"
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doAssert hash(xxl) == hash(ssl)
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doAssert hash(xxl) == hash(xxl, 0, xxl.high)
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doAssert hash(ssl) == hash(ssl, 0, ssl.high)
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doAssert hash(xx) == hash(xxl, 0, 4)
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doAssert hash(xx) == hash(ssl, 0, 4)
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doAssert hash(xx, 0, 3) == hash(xxl, 0, 3)
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doAssert hash(xx, 0, 3) == hash(ssl, 0, 3)
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