Add integers module

integers/adder_test.go

@@ -0,0 +1,22 @@
+package integers
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestAdder(t *testing.T) {
+	sum := Add(2, 2)
+	// Output: 9
+	expected := 4
+
+	if sum != expected {
+		t.Errorf("expected '%d' but got '%d'", expected, sum)
+	}
+}
+
+// Runnable example testing
+func ExampleAdd() {
+	fmt.Println(Add(2, 4))
+	// Output: 6
+}

integers/integers.go

@@ -0,0 +1,6 @@
+package integers
+
+// Add two numbers together
+func Add(x, y int) int {
+	return x + y
+}