test: add unit test for part two and separated inputs as they differ

internal/2017/DayTwo/code_test.go

@@ -2,16 +2,28 @@ package daytwo
 
 import "testing"
 
-var testInput = [][]int{
+func TestPartOne(t *testing.T) {
+	input := [][]int{
 		{5, 1, 9, 5},
 		{7, 5, 3},
 		{2, 4, 6, 8},
-}
-
-func TestPartOne(t *testing.T) {
-	got := PartOne(testInput)
+	}
+	got := PartOne(input)
 	expected := 18
 	if got != expected {
 		t.Errorf("PartOne() = %d, want %d", got, expected)
 	}
 }
+
+func TestPartTwo(t *testing.T) {
+	input := [][]int{
+		{5, 9, 2, 8},
+		{9, 4, 7, 3},
+		{3, 8, 6, 5},
+	}
+	got := PartTwo(input)
+	expected := 9
+	if got != expected {
+		t.Errorf("PartTwo() = %d, want %d", got, expected)
+	}
+}