From 9aa40eb2c5e7dd2b6eefd2dd5fef38eb5b9e8d4b Mon Sep 17 00:00:00 2001
From: Timothy Warren <twarren@nabancard.com>
Date: Tue, 3 Oct 2023 15:08:17 -0400
Subject: [PATCH] Complete integer chapter

---
 integers/adder.go      |  6 ++++++
 integers/adder_test.go | 21 +++++++++++++++++++++
 2 files changed, 27 insertions(+)
 create mode 100644 integers/adder.go
 create mode 100644 integers/adder_test.go

diff --git a/integers/adder.go b/integers/adder.go
new file mode 100644
index 0000000..810fa05
--- /dev/null
+++ b/integers/adder.go
@@ -0,0 +1,6 @@
+package integers
+
+// Add takes two integers and returns the sum of them.
+func Add(x, y int) int {
+	return x + y
+}
diff --git a/integers/adder_test.go b/integers/adder_test.go
new file mode 100644
index 0000000..8b2c9da
--- /dev/null
+++ b/integers/adder_test.go
@@ -0,0 +1,21 @@
+package integers
+
+import (
+	"fmt"
+	"testing"
+)
+
+func ExampleAdd() {
+	sum := Add(1, 5)
+	fmt.Println(sum)
+	// Output: 6
+}
+
+func TestAdder(t *testing.T) {
+	sum := Add(2, 2)
+	expected := 4
+
+	if sum != expected {
+		t.Errorf("expected '%d' but got '%d'", expected, sum)
+	}
+}