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44db8c9f46
Previously the following regexps were improperly handled: .+foo|bar.+ .*foo|bar.* This could lead to unexpected regexp match results. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5297 Thanks to @Haleygo for the initial attempt to fix the issue at https://github.com/VictoriaMetrics/VictoriaMetrics/pull/5308
121 lines
3.4 KiB
Go
121 lines
3.4 KiB
Go
package regexutil
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import (
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"regexp"
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"testing"
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)
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func TestPromRegexParseFailure(t *testing.T) {
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f := func(expr string) {
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t.Helper()
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pr, err := NewPromRegex(expr)
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if err == nil {
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t.Fatalf("expecting non-nil error for expr=%s", expr)
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}
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if pr != nil {
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t.Fatalf("expecting nil pr for expr=%s", expr)
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}
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}
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f("fo[bar")
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f("foo(bar")
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}
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func TestPromRegex(t *testing.T) {
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f := func(expr, s string, resultExpected bool) {
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t.Helper()
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pr, err := NewPromRegex(expr)
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if err != nil {
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t.Fatalf("unexpected error: %s", err)
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}
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result := pr.MatchString(s)
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if result != resultExpected {
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t.Fatalf("unexpected result when matching %q against %q; got %v; want %v", expr, s, result, resultExpected)
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}
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// Make sure the result is the same for regular regexp
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exprAnchored := "^(?:" + expr + ")$"
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re := regexp.MustCompile(exprAnchored)
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result = re.MatchString(s)
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if result != resultExpected {
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t.Fatalf("unexpected result when matching %q against %q during sanity check; got %v; want %v", exprAnchored, s, result, resultExpected)
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}
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}
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f("", "", true)
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f("", "foo", false)
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f("foo", "", false)
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f(".*", "", true)
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f(".*", "foo", true)
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f(".+", "", false)
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f(".+", "foo", true)
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f("foo.*", "bar", false)
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f("foo.*", "foo", true)
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f("foo.*", "foobar", true)
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f("foo.+", "bar", false)
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f("foo.+", "foo", false)
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f("foo.+", "foobar", true)
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f("foo|bar", "", false)
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f("foo|bar", "a", false)
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f("foo|bar", "foo", true)
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f("foo|bar", "bar", true)
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f("foo|bar", "foobar", false)
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f("foo(bar|baz)", "a", false)
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f("foo(bar|baz)", "foobar", true)
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f("foo(bar|baz)", "foobaz", true)
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f("foo(bar|baz)", "foobaza", false)
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f("foo(bar|baz)", "foobal", false)
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f("^foo|b(ar)$", "foo", true)
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f("^foo|b(ar)$", "bar", true)
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f("^foo|b(ar)$", "ar", false)
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f(".*foo.*", "foo", true)
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f(".*foo.*", "afoobar", true)
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f(".*foo.*", "abc", false)
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f("foo.*bar.*", "foobar", true)
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f("foo.*bar.*", "foo_bar_", true)
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f("foo.*bar.*", "foobaz", false)
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f(".+foo.+", "foo", false)
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f(".+foo.+", "afoobar", true)
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f(".+foo.+", "afoo", false)
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f(".+foo.+", "abc", false)
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f("foo.+bar.+", "foobar", false)
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f("foo.+bar.+", "foo_bar_", true)
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f("foo.+bar.+", "foobaz", false)
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f(".+foo.*", "foo", false)
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f(".+foo.*", "afoo", true)
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f(".+foo.*", "afoobar", true)
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f(".*(a|b).*", "a", true)
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f(".*(a|b).*", "ax", true)
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f(".*(a|b).*", "xa", true)
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f(".*(a|b).*", "xay", true)
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f(".*(a|b).*", "xzy", false)
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f("^(?:true)$", "true", true)
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f("^(?:true)$", "false", false)
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// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5297
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f(".+;|;.+", ";", false)
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f(".+;|;.+", "foo", false)
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f(".+;|;.+", "foo;bar", false)
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f(".+;|;.+", "foo;", true)
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f(".+;|;.+", ";foo", true)
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f(".+foo|bar|baz.+", "foo", false)
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f(".+foo|bar|baz.+", "afoo", true)
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f(".+foo|bar|baz.+", "fooa", false)
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f(".+foo|bar|baz.+", "afooa", false)
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f(".+foo|bar|baz.+", "bar", true)
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f(".+foo|bar|baz.+", "abar", false)
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f(".+foo|bar|baz.+", "abara", false)
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f(".+foo|bar|baz.+", "bara", false)
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f(".+foo|bar|baz.+", "baz", false)
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f(".+foo|bar|baz.+", "baza", true)
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f(".+foo|bar|baz.+", "abaz", false)
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f(".+foo|bar|baz.+", "abaza", false)
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f(".+foo|bar|baz.+", "afoo|bar|baza", false)
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f(".+(foo|bar|baz).+", "abara", true)
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f(".+(foo|bar|baz).+", "afooa", true)
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f(".+(foo|bar|baz).+", "abaza", true)
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f(".*;|;.*", ";", true)
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f(".*;|;.*", "foo", false)
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f(".*;|;.*", "foo;bar", false)
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f(".*;|;.*", "foo;", true)
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f(".*;|;.*", ";foo", true)
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}
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