81 lines
2.0 KiB
Go
81 lines
2.0 KiB
Go
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// Copyright (C) 2014 The Syncthing Authors.
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//
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// This program is free software: you can redistribute it and/or modify it
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// under the terms of the GNU General Public License as published by the Free
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// Software Foundation, either version 3 of the License, or (at your option)
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// any later version.
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//
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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// more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this program. If not, see <http://www.gnu.org/licenses/>.
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package main
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import "testing"
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func TestPredictableRandom(t *testing.T) {
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// predictable random sequence is predictable
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e := 3440579354231278675
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if v := predictableRandom.Int(); v != e {
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t.Errorf("Unexpected random value %d != %d", v, e)
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}
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}
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func TestSeedFromBytes(t *testing.T) {
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// should always return the same seed for the same bytes
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tcs := []struct {
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bs []byte
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v int64
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}{
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{[]byte("hello world"), -3639725434188061933},
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{[]byte("hello worlx"), -2539100776074091088},
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}
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for _, tc := range tcs {
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if v := seedFromBytes(tc.bs); v != tc.v {
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t.Errorf("Unexpected seed value %d != %d", v, tc.v)
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}
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}
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}
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func TestRandomString(t *testing.T) {
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for _, l := range []int{0, 1, 2, 3, 4, 8, 42} {
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s := randomString(l)
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if len(s) != l {
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t.Errorf("Incorrect length %d != %s", len(s), l)
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}
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}
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strings := make([]string, 1000)
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for i := range strings {
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strings[i] = randomString(8)
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for j := range strings {
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if i == j {
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continue
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}
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if strings[i] == strings[j] {
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t.Errorf("Repeated random string %q", strings[i])
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}
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}
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}
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}
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func TestRandomInt64(t *testing.T) {
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ints := make([]int64, 1000)
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for i := range ints {
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ints[i] = randomInt64()
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for j := range ints {
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if i == j {
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continue
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}
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if ints[i] == ints[j] {
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t.Errorf("Repeated random int64 %d", ints[i])
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}
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}
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}
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}
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