Adding upstream version 2.5.1.

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

search/query/match_phrase_test.go

@@ -0,0 +1,101 @@
+//  Copyright (c) 2014 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 query
+
+import (
+	"reflect"
+	"testing"
+
+	"github.com/blevesearch/bleve/v2/analysis"
+)
+
+func TestTokenStreamToPhrase(t *testing.T) {
+
+	tests := []struct {
+		tokens analysis.TokenStream
+		result [][]string
+	}{
+		// empty token stream returns nil
+		{
+			tokens: analysis.TokenStream{},
+			result: nil,
+		},
+		// typical token
+		{
+			tokens: analysis.TokenStream{
+				&analysis.Token{
+					Term:     []byte("one"),
+					Position: 1,
+				},
+				&analysis.Token{
+					Term:     []byte("two"),
+					Position: 2,
+				},
+			},
+			result: [][]string{{"one"}, {"two"}},
+		},
+		// token stream containing a gap (usually from stop words)
+		{
+			tokens: analysis.TokenStream{
+				&analysis.Token{
+					Term:     []byte("wag"),
+					Position: 1,
+				},
+				&analysis.Token{
+					Term:     []byte("dog"),
+					Position: 3,
+				},
+			},
+			result: [][]string{{"wag"}, nil, {"dog"}},
+		},
+		// token stream containing multiple tokens at the same position
+		{
+			tokens: analysis.TokenStream{
+				&analysis.Token{
+					Term:     []byte("nia"),
+					Position: 1,
+				},
+				&analysis.Token{
+					Term:     []byte("onia"),
+					Position: 1,
+				},
+				&analysis.Token{
+					Term:     []byte("donia"),
+					Position: 1,
+				},
+				&analysis.Token{
+					Term:     []byte("imo"),
+					Position: 2,
+				},
+				&analysis.Token{
+					Term:     []byte("nimo"),
+					Position: 2,
+				},
+				&analysis.Token{
+					Term:     []byte("ónimo"),
+					Position: 2,
+				},
+			},
+			result: [][]string{{"nia", "onia", "donia"}, {"imo", "nimo", "ónimo"}},
+		},
+	}
+
+	for i, test := range tests {
+		actual := tokenStreamToPhrase(test.tokens)
+		if !reflect.DeepEqual(actual, test.result) {
+			t.Fatalf("expected %#v got %#v for test %d", test.result, actual, i)
+		}
+	}
+}