Adding upstream version 2.5.1.

Signed-off-by: Daniel Baumann <daniel@debian.org>

search/searcher/search_fuzzy_test.go

@@ -0,0 +1,156 @@
+//  Copyright (c) 2015 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"
+	index "github.com/blevesearch/bleve_index_api"
+)
+
+func TestFuzzySearch(t *testing.T) {
+	twoDocIndexReader, err := twoDocIndex.Reader()
+	if err != nil {
+		t.Error(err)
+	}
+
+	defer func() {
+		err := twoDocIndexReader.Close()
+		if err != nil {
+			t.Fatal(err)
+		}
+	}()
+
+	explainTrue := search.SearcherOptions{Explain: true}
+
+	fuzzySearcherbeet, err := NewFuzzySearcher(context.TODO(), twoDocIndexReader, "beet", 0, 1, "desc", 1.0, explainTrue)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	fuzzySearcherdouches, err := NewFuzzySearcher(context.TODO(), twoDocIndexReader, "douches", 0, 2, "desc", 1.0, explainTrue)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	fuzzySearcheraplee, err := NewFuzzySearcher(context.TODO(), twoDocIndexReader, "aplee", 0, 2, "desc", 1.0, explainTrue)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	fuzzySearcherprefix, err := NewFuzzySearcher(context.TODO(), twoDocIndexReader, "water", 3, 2, "desc", 1.0, explainTrue)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	tests := []struct {
+		searcher search.Searcher
+		results  []*search.DocumentMatch
+	}{
+		{
+			searcher: fuzzySearcherbeet,
+			results: []*search.DocumentMatch{
+				{
+					IndexInternalID: index.IndexInternalID("1"),
+					Score:           1.0,
+				},
+				{
+					IndexInternalID: index.IndexInternalID("2"),
+					Score:           0.5,
+				},
+				{
+					IndexInternalID: index.IndexInternalID("3"),
+					Score:           0.5,
+				},
+				{
+					IndexInternalID: index.IndexInternalID("4"),
+					Score:           0.9999999838027345,
+				},
+			},
+		},
+		{
+			searcher: fuzzySearcherdouches,
+			results:  []*search.DocumentMatch{},
+		},
+		{
+			searcher: fuzzySearcheraplee,
+			results: []*search.DocumentMatch{
+				{
+					IndexInternalID: index.IndexInternalID("3"),
+					Score:           0.9581453659370776,
+				},
+			},
+		},
+		{
+			searcher: fuzzySearcherprefix,
+			results: []*search.DocumentMatch{
+				{
+					IndexInternalID: index.IndexInternalID("5"),
+					Score:           1.916290731874155,
+				},
+			},
+		},
+	}
+
+	for testIndex, test := range tests {
+		defer func() {
+			err := test.searcher.Close()
+			if err != nil {
+				t.Fatal(err)
+			}
+		}()
+
+		ctx := &search.SearchContext{
+			DocumentMatchPool: search.NewDocumentMatchPool(test.searcher.DocumentMatchPoolSize(), 0),
+		}
+		next, err := test.searcher.Next(ctx)
+		i := 0
+		for err == nil && next != nil {
+			if i < len(test.results) {
+				if !next.IndexInternalID.Equals(test.results[i].IndexInternalID) {
+					t.Errorf("expected result %d to have id %s got %s for test %d", i, test.results[i].IndexInternalID, next.IndexInternalID, testIndex)
+				}
+				if next.Score != test.results[i].Score {
+					t.Errorf("expected result %d to have score %v got %v for test %d", i, test.results[i].Score, next.Score, testIndex)
+					t.Logf("scoring explanation: %s", next.Expl)
+				}
+			}
+			ctx.DocumentMatchPool.Put(next)
+			next, err = test.searcher.Next(ctx)
+			i++
+		}
+		if err != nil {
+			t.Fatalf("error iterating searcher: %v for test %d", err, testIndex)
+		}
+		if len(test.results) != i {
+			t.Errorf("expected %d results got %d for test %d", len(test.results), i, testIndex)
+		}
+	}
+}
+
+func TestFuzzySearchLimitErrors(t *testing.T) {
+	explainTrue := search.SearcherOptions{Explain: true}
+	_, err := NewFuzzySearcher(context.TODO(), nil, "water", 3, 3, "desc", 1.0, explainTrue)
+	if err == nil {
+		t.Fatal("`fuzziness exceeds max (2)` error expected")
+	}
+
+	_, err = NewFuzzySearcher(context.TODO(), nil, "water", 3, -1, "desc", 1.0, explainTrue)
+	if err == nil {
+		t.Fatal("`invalid fuzziness, negative` error expected")
+	}
+}