49 lines
962 B
Go
49 lines
962 B
Go
package prime
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// Return prime factors in increasing order
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import (
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"reflect"
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"testing"
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)
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const targetTestVersion = 2
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var tests = []struct {
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input int64
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expected []int64
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}{
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{1, []int64{}},
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{2, []int64{2}},
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{3, []int64{3}},
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{4, []int64{2, 2}},
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{6, []int64{2, 3}},
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{8, []int64{2, 2, 2}},
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{9, []int64{3, 3}},
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{27, []int64{3, 3, 3}},
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{625, []int64{5, 5, 5, 5}},
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{901255, []int64{5, 17, 23, 461}},
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{93819012551, []int64{11, 9539, 894119}},
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}
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func TestPrimeFactors(t *testing.T) {
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if testVersion != targetTestVersion {
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t.Fatalf("Found testVersion = %v, want %v", testVersion, targetTestVersion)
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}
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for _, test := range tests {
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actual := Factors(test.input)
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if !reflect.DeepEqual(actual, test.expected) {
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t.Errorf("prime.Factors(%d) = %v; expected %v",
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test.input, actual, test.expected)
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}
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}
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}
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func BenchmarkPrimeFactors(b *testing.B) {
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for i := 0; i < b.N; i++ {
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for _, test := range tests {
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Factors(test.input)
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}
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}
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}
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