Adding upstream version 2.5.1.

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

analysis/lang/en/analyzer_en_test.go

@@ -0,0 +1,105 @@
+//  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 en
+
+import (
+	"reflect"
+	"testing"
+
+	"github.com/blevesearch/bleve/v2/analysis"
+	"github.com/blevesearch/bleve/v2/registry"
+)
+
+func TestEnglishAnalyzer(t *testing.T) {
+	tests := []struct {
+		input  []byte
+		output analysis.TokenStream
+	}{
+		// stemming
+		{
+			input: []byte("books"),
+			output: analysis.TokenStream{
+				&analysis.Token{
+					Term:     []byte("book"),
+					Position: 1,
+					Start:    0,
+					End:      5,
+				},
+			},
+		},
+		{
+			input: []byte("book"),
+			output: analysis.TokenStream{
+				&analysis.Token{
+					Term:     []byte("book"),
+					Position: 1,
+					Start:    0,
+					End:      4,
+				},
+			},
+		},
+		// stop word removal
+		{
+			input:  []byte("the"),
+			output: analysis.TokenStream{},
+		},
+		// possessive removal
+		{
+			input: []byte("steven's"),
+			output: analysis.TokenStream{
+				&analysis.Token{
+					Term:     []byte("steven"),
+					Position: 1,
+					Start:    0,
+					End:      8,
+				},
+			},
+		},
+		{
+			input: []byte("steven\u2019s"),
+			output: analysis.TokenStream{
+				&analysis.Token{
+					Term:     []byte("steven"),
+					Position: 1,
+					Start:    0,
+					End:      10,
+				},
+			},
+		},
+		{
+			input: []byte("steven\uFF07s"),
+			output: analysis.TokenStream{
+				&analysis.Token{
+					Term:     []byte("steven"),
+					Position: 1,
+					Start:    0,
+					End:      10,
+				},
+			},
+		},
+	}
+
+	cache := registry.NewCache()
+	analyzer, err := cache.AnalyzerNamed(AnalyzerName)
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, test := range tests {
+		actual := analyzer.Analyze(test.input)
+		if !reflect.DeepEqual(actual, test.output) {
+			t.Errorf("expected %v, got %v", test.output, actual)
+		}
+	}
+}