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-rw-r--r--go/prime-factors/primefactors_test.go48
1 files changed, 48 insertions, 0 deletions
diff --git a/go/prime-factors/primefactors_test.go b/go/prime-factors/primefactors_test.go
new file mode 100644
index 0000000..40bbed8
--- /dev/null
+++ b/go/prime-factors/primefactors_test.go
@@ -0,0 +1,48 @@
+package prime
+
+// Return prime factors in increasing order
+
+import (
+ "reflect"
+ "testing"
+)
+
+const targetTestVersion = 2
+
+var tests = []struct {
+ input int64
+ expected []int64
+}{
+ {1, []int64{}},
+ {2, []int64{2}},
+ {3, []int64{3}},
+ {4, []int64{2, 2}},
+ {6, []int64{2, 3}},
+ {8, []int64{2, 2, 2}},
+ {9, []int64{3, 3}},
+ {27, []int64{3, 3, 3}},
+ {625, []int64{5, 5, 5, 5}},
+ {901255, []int64{5, 17, 23, 461}},
+ {93819012551, []int64{11, 9539, 894119}},
+}
+
+func TestPrimeFactors(t *testing.T) {
+ if testVersion != targetTestVersion {
+ t.Fatalf("Found testVersion = %v, want %v", testVersion, targetTestVersion)
+ }
+ for _, test := range tests {
+ actual := Factors(test.input)
+ if !reflect.DeepEqual(actual, test.expected) {
+ t.Errorf("prime.Factors(%d) = %v; expected %v",
+ test.input, actual, test.expected)
+ }
+ }
+}
+
+func BenchmarkPrimeFactors(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ for _, test := range tests {
+ Factors(test.input)
+ }
+ }
+}