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[stdlib] Make comparison operator choices consistent

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This commit is contained in:
Arsen Gasparyan
2015-12-16 14:21:33 +03:00
parent 4002758844
commit 9f728c6dbd
3 changed files with 55 additions and 50 deletions
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58
validation-test/stdlib/Algorithm.swift
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@@ -25,14 +25,58 @@ public func == (
// FIXME(prext): move this struct to the point of use.
Algorithm.test("min,max") {
expectEqual(2, min(3, 2))
expectEqual(3, min(3, 7, 5))
expectEqual(3, max(3, 2))
expectEqual(7, max(3, 7, 5))
// Identities are unique in this set.
let a1 = MinimalComparableValue(0, identity: 1)
let a2 = MinimalComparableValue(0, identity: 2)
let a3 = MinimalComparableValue(0, identity: 3)
let b1 = MinimalComparableValue(1, identity: 4)
let b2 = MinimalComparableValue(1, identity: 5)
let b3 = MinimalComparableValue(1, identity: 6)
let c1 = MinimalComparableValue(2, identity: 7)
let c2 = MinimalComparableValue(2, identity: 8)
let c3 = MinimalComparableValue(2, identity: 9)
// FIXME: add tests that check that min/max return the
// first element of the sequence (by reference equality) that satisfy the
// condition.
// 2-arg min()
expectEqual(a1.identity, min(a1, b1).identity)
expectEqual(a1.identity, min(b1, a1).identity)
expectEqual(a1.identity, min(a1, a2).identity)
// 2-arg max()
expectEqual(c1.identity, max(c1, b1).identity)
expectEqual(c1.identity, max(b1, c1).identity)
expectEqual(c1.identity, max(c2, c1).identity)
// 3-arg min()
expectEqual(a1.identity, min(a1, b1, c1).identity)
expectEqual(a1.identity, min(b1, a1, c1).identity)
expectEqual(a1.identity, min(c1, b1, a1).identity)
expectEqual(a1.identity, min(c1, a1, b1).identity)
expectEqual(a1.identity, min(a1, a2, a3).identity)
expectEqual(a1.identity, min(a1, a2, b1).identity)
expectEqual(a1.identity, min(a1, b1, a2).identity)
expectEqual(a1.identity, min(b1, a1, a2).identity)
// 3-arg max()
expectEqual(c1.identity, max(c1, b1, a1).identity)
expectEqual(c1.identity, max(a1, c1, b1).identity)
expectEqual(c1.identity, max(b1, a1, c1).identity)
expectEqual(c1.identity, max(b1, c1, a1).identity)
expectEqual(c1.identity, max(c3, c2, c1).identity)
expectEqual(c1.identity, max(c2, c1, b1).identity)
expectEqual(c1.identity, max(c2, b1, c1).identity)
expectEqual(c1.identity, max(b1, c2, c1).identity)
// 4-arg min()
expectEqual(a1.identity, min(a1, b1, a2, b2).identity)
expectEqual(a1.identity, min(b1, a1, a2, b2).identity)
expectEqual(a1.identity, min(c1, b1, b2, a1).identity)
expectEqual(a1.identity, min(c1, b1, a1, a2).identity)
// 4-arg max()
expectEqual(c1.identity, max(c2, b1, c1, b2).identity)
expectEqual(c1.identity, max(b1, c2, c1, b2).identity)
expectEqual(c1.identity, max(a1, b1, b2, c1).identity)
expectEqual(c1.identity, max(a1, b1, c2, c1).identity)
}
Algorithm.test("sorted/strings")