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e9ec8cd39c
* [NOD-142] Updated util.FastLog2Floor to work on uint64 * [NOD-142] Convert height and chainHeight to uint64 * [NOD-142] A couple fixes in comments of TestFastLog2Floor * [NOD-142] Make spendableOutOffset uint64 too
36 lines
713 B
Go
36 lines
713 B
Go
package util
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import (
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"testing"
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)
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func TestFastLog2Floor(t *testing.T) {
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tests := []struct {
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n uint64
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expectedResult uint8
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}{
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{1, 0},
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{2, 1},
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{3, 1},
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{4, 2},
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{5, 2},
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{16, 4},
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{31, 4},
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{1684234, 20},
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{4294967295, 31}, // math.MaxUint32 (2^32 - 1)
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{4294967296, 32}, // 2^32
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{4294967297, 32}, // 2^32 + 1
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{4611686018427387904, 62},
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{9223372036854775808, 63}, // 2^63
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{18446744073709551615, 63}, // math.MaxUint64 (2^64 - 1).
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}
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for _, test := range tests {
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actualResult := FastLog2Floor(test.n)
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if test.expectedResult != actualResult {
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t.Errorf("TestFastLog2Floor: %d: expected result: %d but got: %d", test.n, test.expectedResult, actualResult)
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}
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}
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}
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