Add math_test.go

Author: sfischer13

math_test.go

@@ -0,0 +1,22 @@
+package datautils
+
+import "testing"
+
+func TestMax(t *testing.T) {
+	data := []struct {
+		x int64
+		y int64
+		m int64
+	}{
+		{1, 1, 1},
+		{1, 2, 2},
+		{2, 1, 2},
+	}
+
+	for _, d := range data {
+		max := Max(d.x, d.y)
+		if max != d.m {
+			t.Errorf("Max(%d, %d) was wrong: %d is not %d", d.x, d.y, max, d.m)
+		}
+	}
+}