99 lines
3.8 KiB
Go
99 lines
3.8 KiB
Go
// Copyright 2020 The Prometheus 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 labels
|
|
|
|
import (
|
|
"regexp/syntax"
|
|
"testing"
|
|
|
|
"github.com/stretchr/testify/require"
|
|
)
|
|
|
|
func TestNewFastRegexMatcher(t *testing.T) {
|
|
cases := []struct {
|
|
regex string
|
|
value string
|
|
expected bool
|
|
}{
|
|
{regex: "(foo|bar)", value: "foo", expected: true},
|
|
{regex: "(foo|bar)", value: "foo bar", expected: false},
|
|
{regex: "(foo|bar)", value: "bar", expected: true},
|
|
{regex: "foo.*", value: "foo bar", expected: true},
|
|
{regex: "foo.*", value: "bar foo", expected: false},
|
|
{regex: ".*foo", value: "foo bar", expected: false},
|
|
{regex: ".*foo", value: "bar foo", expected: true},
|
|
{regex: ".*foo", value: "foo", expected: true},
|
|
{regex: "^.*foo$", value: "foo", expected: true},
|
|
{regex: "^.+foo$", value: "foo", expected: false},
|
|
{regex: "^.+foo$", value: "bfoo", expected: true},
|
|
{regex: ".*", value: "\n", expected: false},
|
|
{regex: ".*", value: "\nfoo", expected: false},
|
|
{regex: ".*foo", value: "\nfoo", expected: false},
|
|
{regex: "foo.*", value: "foo\n", expected: false},
|
|
{regex: "foo\n.*", value: "foo\n", expected: true},
|
|
{regex: ".*foo.*", value: "foo", expected: true},
|
|
{regex: ".*foo.*", value: "foo bar", expected: true},
|
|
{regex: ".*foo.*", value: "hello foo world", expected: true},
|
|
{regex: ".*foo.*", value: "hello foo\n world", expected: false},
|
|
{regex: ".*foo\n.*", value: "hello foo\n world", expected: true},
|
|
{regex: ".*", value: "foo", expected: true},
|
|
{regex: "", value: "foo", expected: false},
|
|
{regex: "", value: "", expected: true},
|
|
}
|
|
|
|
for _, c := range cases {
|
|
m, err := NewFastRegexMatcher(c.regex)
|
|
require.NoError(t, err)
|
|
require.Equal(t, c.expected, m.MatchString(c.value))
|
|
}
|
|
}
|
|
|
|
func TestOptimizeConcatRegex(t *testing.T) {
|
|
cases := []struct {
|
|
regex string
|
|
prefix string
|
|
suffix string
|
|
contains string
|
|
}{
|
|
{regex: "foo(hello|bar)", prefix: "foo", suffix: "", contains: ""},
|
|
{regex: "foo(hello|bar)world", prefix: "foo", suffix: "world", contains: ""},
|
|
{regex: "foo.*", prefix: "foo", suffix: "", contains: ""},
|
|
{regex: "foo.*hello.*bar", prefix: "foo", suffix: "bar", contains: "hello"},
|
|
{regex: ".*foo", prefix: "", suffix: "foo", contains: ""},
|
|
{regex: "^.*foo$", prefix: "", suffix: "foo", contains: ""},
|
|
{regex: ".*foo.*", prefix: "", suffix: "", contains: "foo"},
|
|
{regex: ".*foo.*bar.*", prefix: "", suffix: "", contains: "foo"},
|
|
{regex: ".*(foo|bar).*", prefix: "", suffix: "", contains: ""},
|
|
{regex: ".*[abc].*", prefix: "", suffix: "", contains: ""},
|
|
{regex: ".*((?i)abc).*", prefix: "", suffix: "", contains: ""},
|
|
{regex: ".*(?i:abc).*", prefix: "", suffix: "", contains: ""},
|
|
{regex: "(?i:abc).*", prefix: "", suffix: "", contains: ""},
|
|
{regex: ".*(?i:abc)", prefix: "", suffix: "", contains: ""},
|
|
{regex: ".*(?i:abc)def.*", prefix: "", suffix: "", contains: "def"},
|
|
{regex: "(?i).*(?-i:abc)def", prefix: "", suffix: "", contains: "abc"},
|
|
{regex: ".*(?msU:abc).*", prefix: "", suffix: "", contains: "abc"},
|
|
{regex: "[aA]bc.*", prefix: "", suffix: "", contains: "bc"},
|
|
}
|
|
|
|
for _, c := range cases {
|
|
parsed, err := syntax.Parse(c.regex, syntax.Perl)
|
|
require.NoError(t, err)
|
|
|
|
prefix, suffix, contains := optimizeConcatRegex(parsed)
|
|
require.Equal(t, c.prefix, prefix)
|
|
require.Equal(t, c.suffix, suffix)
|
|
require.Equal(t, c.contains, contains)
|
|
}
|
|
}
|