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package random
import (
"math"
"strconv"
"testing"
"unicode/utf8"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestMatchChars(t *testing.T) {
if testing.Short() {
t.Skip("skipping slow test")
}
t.Parallel()
testdata := []struct {
in string
expected string
}{
{"[a-g]", "abcdefg"},
{"[a-zA-Z0-9_.-]", defaultSet},
{"[[:alpha:]]", "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"},
}
for i, d := range testdata {
t.Run(strconv.Itoa(i), func(t *testing.T) {
t.Parallel()
out, err := matchChars(d.in)
require.NoError(t, err)
assert.EqualValues(t, d.expected, out)
})
}
}
func TestStringRE(t *testing.T) {
t.Parallel()
r, err := StringRE(15, "[\\p{Yi}[:alnum:]]")
require.NoError(t, err)
assert.Equal(t, 15, utf8.RuneCountInString(r))
_, err = StringRE(1, "[bogus")
require.Error(t, err)
}
func TestStringBounds(t *testing.T) {
t.Parallel()
_, err := StringBounds(15, 0, 19)
require.Error(t, err)
// surrogate range isn't valid, should error
_, err = StringBounds(15, 0xd800, 0xdfff)
require.Error(t, err)
r, err := StringBounds(1, 'a', 'a')
require.NoError(t, err)
assert.Equal(t, "a", r)
r, err = StringBounds(99, 'a', 'b')
require.NoError(t, err)
assert.Regexp(t, "^[a-b]+$", r)
r, err = StringBounds(100, 0x0020, 0x007f)
require.NoError(t, err)
assert.Regexp(t, "^[\u0020-\u007f]*$", r)
// only 🂱 (\U0001F0B1) in this range is "graphic"
r, err = StringBounds(8, 0x0001f0af, 0x0001f0b1)
require.NoError(t, err)
assert.Regexp(t, "^🂱🂱🂱🂱🂱🂱🂱🂱$", r)
}
func TestItem(t *testing.T) {
t.Parallel()
_, err := Item(nil)
require.Error(t, err)
i, err := Item([]any{"foo"})
require.NoError(t, err)
assert.Equal(t, "foo", i)
in := []any{"foo", "bar"}
got := ""
for range 10 {
i, err = Item(in)
require.NoError(t, err)
got += i.(string)
}
assert.NotEqual(t, "foofoofoofoofoofoofoofoofoofoo", got)
assert.NotEqual(t, "barbarbarbarbarbarbarbarbarbar", got)
}
func TestNumber(t *testing.T) {
t.Parallel()
_, err := Number(0, -1)
require.Error(t, err)
_, err = Number(0, math.MaxInt64)
require.Error(t, err)
_, err = Number(math.MinInt64, 0)
require.Error(t, err)
testdata := []struct {
min, max, expected int64
delta float64
}{
{0, 100, 50, 50},
{0, 0, 0, 0},
{9, 9, 9, 0},
{-10, -10, -10, 0},
{-10, -0, -5, 5},
}
for _, d := range testdata {
n, err := Number(d.min, d.max)
require.NoError(t, err)
assert.InDelta(t, d.expected, n, d.delta)
}
}
func TestFloat(t *testing.T) {
t.Parallel()
testdata := []struct {
min, max, expected float64
delta float64
}{
{0, 1.0, 0.5, 0.5},
{0, 0.5, 0.25, 0.25},
{490, 500, 495, 5},
{-500, 500, 0, 500},
{0, math.MaxFloat64, math.MaxFloat64 / 2, math.MaxFloat64 / 2},
}
for _, d := range testdata {
n, err := Float(d.min, d.max)
require.NoError(t, err)
assert.InDelta(t, d.expected, n, d.delta)
}
}
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