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package regexp
import (
"testing"
"github.com/stretchr/testify/assert"
)
func TestFind(t *testing.T) {
f, err := Find(`[a-z]+`, `foo bar baz`)
assert.NoError(t, err)
assert.Equal(t, "foo", f)
_, err = Find(`[a-`, "")
assert.Error(t, err)
}
func TestFindAll(t *testing.T) {
_, err := FindAll(`[a-`, 42, "")
assert.Error(t, err)
testdata := []struct {
re string
n int
in string
expected []string
}{
{`[a-z]+`, -1, `foo bar baz`, []string{"foo", "bar", "baz"}},
{`[a-z]+`, 0, `foo bar baz`, nil},
{`[a-z]+`, 2, `foo bar baz`, []string{"foo", "bar"}},
{`[a-z]+`, 14, `foo bar baz`, []string{"foo", "bar", "baz"}},
}
for _, d := range testdata {
f, err := FindAll(d.re, d.n, d.in)
assert.NoError(t, err)
assert.EqualValues(t, d.expected, f)
}
}
func TestMatch(t *testing.T) {
assert.True(t, Match(`^[a-z]+\[[0-9]+\]$`, "adam[23]"))
assert.True(t, Match(`^[a-z]+\[[0-9]+\]$`, "eve[7]"))
assert.False(t, Match(`^[a-z]+\[[0-9]+\]$`, "Job[48]"))
assert.False(t, Match(`^[a-z]+\[[0-9]+\]$`, "snakey"))
}
func TestReplace(t *testing.T) {
testdata := []struct {
expected string
expression string
replacement string
input string
}{
{"-T-T-", "a(x*)b", "T", "-ab-axxb-"},
{"--xx-", "a(x*)b", "$1", "-ab-axxb-"},
{"---", "a(x*)b", "$1W", "-ab-axxb-"},
{"-W-xxW-", "a(x*)b", "${1}W", "-ab-axxb-"},
{"Turing, Alan", "(?P<first>[a-zA-Z]+) (?P<last>[a-zA-Z]+)", "${last}, ${first}", "Alan Turing"},
}
for _, d := range testdata {
assert.Equal(t, d.expected, Replace(d.expression, d.replacement, d.input))
}
}
func TestReplaceLiteral(t *testing.T) {
_, err := ReplaceLiteral(`[a-`, "", "")
assert.Error(t, err)
testdata := []struct {
expected string
expression string
replacement string
input string
}{
{"-T-T-", "a(x*)b", "T", "-ab-axxb-"},
{"-$1-$1-", "a(x*)b", "$1", "-ab-axxb-"},
{"-$1W-$1W-", "a(x*)b", "$1W", "-ab-axxb-"},
{"-${1}W-${1}W-", "a(x*)b", "${1}W", "-ab-axxb-"},
{"${last}, ${first}", "(?P<first>[a-zA-Z]+) (?P<last>[a-zA-Z]+)", "${last}, ${first}", "Alan Turing"},
}
for _, d := range testdata {
r, err := ReplaceLiteral(d.expression, d.replacement, d.input)
assert.NoError(t, err)
assert.Equal(t, d.expected, r)
}
}
func TestSplit(t *testing.T) {
_, err := Split(`[a-`, 42, "")
assert.Error(t, err)
testdata := []struct {
re string
n int
in string
expected []string
}{
{`\s+`, -1, "foo bar baz\tqux", []string{"foo", "bar", "baz", "qux"}},
{`,`, 0, `foo bar baz`, nil},
{` `, 2, `foo bar baz`, []string{"foo", "bar baz"}},
{`[\s,.]`, 14, `foo bar.baz,qux`, []string{"foo", "bar", "baz", "qux"}},
}
for _, d := range testdata {
f, err := Split(d.re, d.n, d.in)
assert.NoError(t, err)
assert.EqualValues(t, d.expected, f)
}
}
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