SumInt64

Author: yitsushi

math/sum.go

@@ -0,0 +1,12 @@
+package math
+
+// SumInt64 returns the sum of all the provided values.
+func SumInt64(values ...int64) int64 {
+	var result int64
+
+	for _, value := range values {
+		result += value
+	}
+
+	return result
+}

math/sum_test.go

@@ -0,0 +1,26 @@
+package math_test
+
+import (
+	"testing"
+
+	"github.com/yitsushi/go-aoc/math"
+)
+
+func TestSumInt64(t *testing.T) {
+	tests := []struct {
+		name string
+		list []int64
+		want int64
+	}{
+		{name: "empty", list: []int64{}, want: 0},
+		{name: "values", list: []int64{1, 2, 3}, want: 6},
+		{name: "values", list: []int64{5, 4, 92, 13, 42, 52}, want: 208},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := math.SumInt64(tt.list...); got != tt.want {
+				t.Errorf("SumInt64() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}