diff options
| -rw-r--r-- | prog/mutation.go | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/prog/mutation.go b/prog/mutation.go index 07b524fe2..47b682342 100644 --- a/prog/mutation.go +++ b/prog/mutation.go @@ -416,8 +416,14 @@ func mutateBufferSize(r *randGen, arg *DataArg, minLen, maxLen uint64) { } func (t *ArrayType) mutate(r *randGen, s *state, arg Arg, ctx ArgCtx) (calls []*Call, retry, preserve bool) { - // TODO: swap elements of the array a := arg.(*GroupArg) + if len(a.Inner) > 1 && r.oneOf(5) { + // Swap array elements. + for r.nOutOf(2, 3) { + i, j := r.Intn(len(a.Inner)), r.Intn(len(a.Inner)) + a.Inner[i], a.Inner[j] = a.Inner[j], a.Inner[i] + } + } count := uint64(0) switch t.Kind { case ArrayRandLen: |