Add: Sum of Two Integers

problems/sum-of-two-integers/sum_of_two_integers.go

@@ -1 +1,8 @@
 package sum_of_two_integers
+
+func getSum(a int, b int) int {
+	for b != 0 {
+		a, b = a^b, (a&b)<<1
+	}
+	return a
+}

problems/sum-of-two-integers/sum_of_two_integers_test.go

@@ -1 +1,30 @@
 package sum_of_two_integers
+
+import "testing"
+
+type caseType struct {
+	a        int
+	b        int
+	expected int
+}
+
+func TestGetSum(t *testing.T) {
+	tests := [...]caseType{
+		{
+			a:        1,
+			b:        2,
+			expected: 3,
+		},
+		{
+			a:        -2,
+			b:        3,
+			expected: 1,
+		},
+	}
+	for _, tc := range tests {
+		output := getSum(tc.a, tc.b)
+		if output != tc.expected {
+			t.Fatalf("input: %v %v, output: %v, expected: %v", tc.a, tc.b, output, tc.expected)
+		}
+	}
+}