Move SliceOfNZero to test/generator package

test/generator/gen.go

@@ -6,6 +6,15 @@ import (
 	"pgregory.net/rapid"
 )
 
+// Error returns a new error created by calling [errors.New] with a random string.
 func Error() *rapid.Generator[error] {
 	return rapid.Map(rapid.String(), errors.New)
 }
+
+// SliceOfNZero returns a generator that makes slices of the zero value of T.
+// The range of slice lengths are determined as in [rapid.SliceOfN].
+func SliceOfNZero[T any](minLen, maxLen int) *rapid.Generator[[]T] {
+	return rapid.Map(rapid.IntRange(minLen, maxLen), func(n int) []T {
+		return make([]T, n)
+	})
+}