debugging DefaltApplyJitter, adding tests

fibonacci/fibonacci.go

@@ -93,6 +93,8 @@ func Fibonacci(n int64) int64 {
 	case n >= int64(len(TheFibonacciSequence)):
 		panic(fmt.Sprintf("invalid input: %d overflows int64\n",
 			n))
+	case n < 0:
+		panic(fmt.Sprintf("invalid input: %d would cause index out of range panic\n", n))
 	default:
 		return TheFibonacciSequence[n]
 	}

fibonacci/fibonacci_test.go

@@ -2,19 +2,12 @@ package fibonacci
 
 import (
 	"context"
-	"fmt"
-	"math/big"
 	"testing"
 	"time"
 
 	"code.wmdillon.com/wmdillon/backoff/utilities"
 )
 
-func wouldOverflow(a, b int64) (product int64, overflows bool) {
-	results := new(big.Int).Mul(big.NewInt(a), big.NewInt(b))
-	return results.Int64(), results.IsInt64()
-}
-
 func fibonacci(n int64) int64 {
 	switch {
 	case n <= 0:
@@ -129,7 +122,6 @@ func TestFibonacciPauseLimit(t *testing.T) {
 			t.Fatalf("error for %d: expected value in range %s - %s; got %s\n", input, min, max, got)
 		}
 	}
-	fmt.Printf("finished\n")
 }
 
 func TestFibonacciBackoffAfter(t *testing.T) {