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//
// Copyright 2022 The Sigstore Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package ntpmonitor
import (
"math/rand"
"testing"
)
var seed = int64(1668159633)
func TestEmptySelection(t *testing.T) {
cases := []struct {
input []string
n int
}{
{
input: []string{},
n: -1,
},
{
input: []string{},
n: 0,
},
{
input: []string{},
n: 1,
},
{
input: []string{"a", "b"},
n: -1,
},
{
input: []string{"a", "b"},
n: 0,
},
{
input: []string{"a", "b"},
n: 4,
},
}
r := rand.New(rand.NewSource(seed)) // initialize local pseudorandom generator
for _, c := range cases {
got := RandomChoice(c.input, c.n, r)
if len(got) != 0 {
t.Fail()
}
}
}
func TestSelection(t *testing.T) {
cases := []struct {
input []string
n int
want []string
}{
{
input: []string{"a"},
n: 1,
want: []string{"a"},
},
{
input: []string{"a", "b", "c", "d"},
n: 1,
want: []string{"b"},
},
{
input: []string{"a", "b", "c", "d", "e", "f", "g"},
n: 3,
want: []string{"d", "e", "a"},
},
}
r := rand.New(rand.NewSource(seed)) // initialize local pseudorandom generator
for _, c := range cases {
got := RandomChoice(c.input, c.n, r)
if len(got) != len(c.want) {
t.Fail()
}
for i := range got {
if got[i] != c.want[i] {
t.Errorf("expected '%s' got '%s'",
c.want[i],
got[i])
}
}
}
}
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