test: add P1 unit test

internal/2022/DayTwo/code_test.go

@@ -0,0 +1,17 @@
+package daytwo
+
+import "testing"
+
+var testInput = []string{
+	"A Y",
+	"B X",
+	"C Z",
+}
+
+func TestPartOne(t *testing.T) {
+	expected := 15
+	got := PartOne(testInput)
+	if got != expected {
+		t.Errorf("PartOne() = %d, want %d", got, expected)
+	}
+}