mirror of
https://github.com/prometheus/prometheus.git
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80 lines
2.6 KiB
Go
80 lines
2.6 KiB
Go
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// Copyright 2020 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package labels
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import (
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"regexp/syntax"
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"testing"
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"github.com/prometheus/prometheus/util/testutil"
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)
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func TestNewFastRegexMatcher(t *testing.T) {
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cases := []struct {
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regex string
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value string
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expected bool
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}{
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{regex: "(foo|bar)", value: "foo", expected: true},
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{regex: "(foo|bar)", value: "foo bar", expected: false},
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{regex: "(foo|bar)", value: "bar", expected: true},
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{regex: "foo.*", value: "foo bar", expected: true},
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{regex: "foo.*", value: "bar foo", expected: false},
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{regex: ".*foo", value: "foo bar", expected: false},
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{regex: ".*foo", value: "bar foo", expected: true},
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{regex: ".*foo", value: "foo", expected: true},
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{regex: "^.*foo$", value: "foo", expected: true},
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{regex: "^.+foo$", value: "foo", expected: false},
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{regex: "^.+foo$", value: "bfoo", expected: true},
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{regex: ".*", value: "\n", expected: false},
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{regex: ".*", value: "\nfoo", expected: false},
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{regex: ".*foo", value: "\nfoo", expected: false},
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{regex: "foo.*", value: "foo\n", expected: false},
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{regex: "foo\n.*", value: "foo\n", expected: true},
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{regex: ".*", value: "foo", expected: true},
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{regex: "", value: "foo", expected: false},
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{regex: "", value: "", expected: true},
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}
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for _, c := range cases {
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m, err := NewFastRegexMatcher(c.regex)
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testutil.Ok(t, err)
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testutil.Equals(t, c.expected, m.MatchString(c.value))
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}
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}
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func TestOptimizeConcatRegex(t *testing.T) {
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cases := []struct {
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regex string
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prefix string
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suffix string
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}{
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{regex: "foo(hello|bar)", prefix: "foo", suffix: ""},
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{regex: "foo(hello|bar)world", prefix: "foo", suffix: "world"},
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{regex: "foo.*", prefix: "foo", suffix: ""},
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{regex: "foo.*hello.*bar", prefix: "foo", suffix: "bar"},
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{regex: ".*foo", prefix: "", suffix: "foo"},
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{regex: "^.*foo$", prefix: "", suffix: "foo"},
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}
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for _, c := range cases {
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parsed, err := syntax.Parse(c.regex, syntax.Perl)
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testutil.Ok(t, err)
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prefix, suffix := optimizeConcatRegex(parsed)
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testutil.Equals(t, c.prefix, prefix)
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testutil.Equals(t, c.suffix, suffix)
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}
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}
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