fix: out of range with 1 test on 3 buckets (#5)

Author: Eun

main.go

@@ -155,6 +155,10 @@ func filterTests(tests *[]testing.InternalTest, bucketIndex, bucketCount int, di
 		perBucket := int(math.Ceil(float64(len(*tests)) / float64(bucketCount)))
 
 		from := bucketIndex * perBucket
+		if from >= len(*tests) { // out of bounds
+			*tests = (*tests)[:0]
+			return
+		}
 		to := from + perBucket
 
 		if to > len(*tests)-1 {

main_test.go

@@ -183,6 +183,12 @@ func Test_filterTestsBuckets(t *testing.T) {
 			2,
 			[]int{1, 0},
 		},
+		{
+			"1/3",
+			1,
+			3,
+			[]int{1, 0, 0},
+		},
 		{
 			"3/2",
 			3,