1 files changed, 15 insertions, 0 deletions
diff --git a/tests/legacy/examples/cgo/cgo_lib_test.go b/tests/legacy/examples/cgo/cgo_lib_test.go
new file mode 100644
index 00000000..a486da6a
--- /dev/null
+++ b/tests/legacy/examples/cgo/cgo_lib_test.go
@@ -0,0 +1,15 @@
+package cgo
+
+import (
+	"math"
+	"testing"
+)
+
+func TestNsqrt(t *testing.T) {
+	for _, n := range []int{1, 2, 10, 100, 1000} {
+		got, want := Nsqrt(n), int(math.Floor(math.Sqrt(float64(n))))
+		if got != want {
+			t.Errorf("Nsqrt(n) = %d; want %d", got, want)
+		}
+	}
+}