3 files changed, 126 insertions(+), 3 deletions(-)

A 1/fuel_test.go
A 1/input.txt
M 1/main.go

@@ 0,0 1,19 @@
+package main
+
+import "testing"
+
+func TestFuel1(t *testing.T) {
+	t.Parallel()
+	if calcFuel(12) != 2 {
+		t.Error("Error")
+	}
+	if calcFuel(14) != 2 {
+		t.Error("Error")
+	}
+	if calcFuel(1969) != 654 {
+		t.Error("Error")
+	}
+	if calcFuel(100756) != 33583 {
+		t.Error("Error")
+	}
+}

@@ 0,0 1,100 @@
+78207
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@@ 10,9 10,9 @@ func calcFuel(mass int) int {
 	return mass/3 - 2
 }
 
-func main() {
+func totalFuel(input string) int {
 	var lines []int
-	lines, err := tools.ScanFileInt("input.txt")
+	lines, err := tools.ScanFileInt(input)
 	if err != nil {
 		fmt.Println("Error")
 	}


@@ 20,5 20,9 @@ func main() {
 	for _, value := range lines {
 		sum += calcFuel(value)
 	}
-	fmt.Println(sum)
+	return sum
+}
+
+func main() {
+	fmt.Println(totalFuel("input.txt"))
 }