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upstream-bleve/search/searcher/search_multi_term_test.go
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snapshot of https://github.com/blevesearch/bleve.git (master, 2026-09-15; blobs > 131072B omitted)
2026-09-15 22:27:16 +05:00

102 lines
3.3 KiB
Go

// Copyright (c) 2026 Couchbase, Inc.
//
// 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 searcher
import (
"context"
"testing"
"github.com/blevesearch/bleve/v2/search"
)
// ctxWithTermSearcherLimit caps the number of leaf term searchers, giving us a
// deterministic way to make term searcher construction fail on purpose.
func ctxWithTermSearcherLimit(limit int) context.Context {
ctx := context.WithValue(context.Background(), search.MaxTermSearchersKey, limit)
return search.ContextWithTermSearchersCounter(ctx)
}
// A term searcher that fails to build must come back as a nil search.Searcher
// interface, never as an interface holding a nil *TermSearcher. Callers guard
// their cleanup with `if searcher != nil`, and a typed nil slips past that guard
// and panics on a nil receiver in (*TermSearcher).Close.
func TestTermSearcherErrorReturnsNilSearcher(t *testing.T) {
twoDocIndexReader, err := twoDocIndex.Reader()
if err != nil {
t.Fatal(err)
}
defer func() {
if err := twoDocIndexReader.Close(); err != nil {
t.Fatal(err)
}
}()
// Room for exactly one leaf term searcher, so the second one fails inside
// newTermSearcherFromReader.
ctx := ctxWithTermSearcherLimit(1)
first, err := NewTermSearcher(ctx, twoDocIndexReader, "beer", "desc", 1.0,
search.SearcherOptions{})
if err != nil {
t.Fatalf("first term searcher should be within the limit, got: %v", err)
}
defer func() {
if err := first.Close(); err != nil {
t.Fatal(err)
}
}()
second, err := NewTermSearcher(ctx, twoDocIndexReader, "angst", "desc", 1.0,
search.SearcherOptions{})
if err == nil {
_ = second.Close()
t.Fatal("second term searcher should have exceeded the limit of 1")
}
if second != nil {
t.Fatalf("expected a nil search.Searcher alongside the error, got an "+
"interface holding %T (typed nil: %v)", second, second == search.Searcher(nil))
}
}
// Regression test for the panic in makeBatchSearchers' cleanup: when one term in
// the batch fails to build, closing the already-built searchers must not trip
// over the failed entry.
func TestMultiTermSearcherCleanupAfterError(t *testing.T) {
twoDocIndexReader, err := twoDocIndex.Reader()
if err != nil {
t.Fatal(err)
}
defer func() {
if err := twoDocIndexReader.Close(); err != nil {
t.Fatal(err)
}
}()
// Two of the three terms build; the third trips the limit, sending
// makeBatchSearchers down its qsearchersClose path.
ctx := ctxWithTermSearcherLimit(2)
terms := []string{"beer", "angst", "couch"}
searcher, err := NewMultiTermSearcher(ctx, twoDocIndexReader, terms, "desc",
1.0, search.SearcherOptions{}, true)
if err == nil {
_ = searcher.Close()
t.Fatalf("%d terms should have exceeded the limit of 2", len(terms))
}
if searcher != nil {
t.Fatalf("expected a nil search.Searcher alongside the error, got %T", searcher)
}
}