//  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 stemmer

import (
	"reflect"
	"testing"

	"github.com/blevesearch/bleve/analysis"
)

func TestStemmerFilter(t *testing.T) {

	inputTokenStream := analysis.TokenStream{
		&analysis.Token{
			Term: []byte("walking"),
		},
		&analysis.Token{
			Term: []byte("talked"),
		},
		&analysis.Token{
			Term: []byte("business"),
		},
		&analysis.Token{
			Term:    []byte("protected"),
			KeyWord: true,
		},
	}

	expectedTokenStream := analysis.TokenStream{
		&analysis.Token{
			Term: []byte("walk"),
		},
		&analysis.Token{
			Term: []byte("talk"),
		},
		&analysis.Token{
			Term: []byte("busi"),
		},
		&analysis.Token{
			Term:    []byte("protected"),
			KeyWord: true,
		},
	}

	filter, err := NewStemmerFilter("en")
	if err != nil {
		t.Fatal(err)
	}
	ouputTokenStream := filter.Filter(inputTokenStream)
	if !reflect.DeepEqual(ouputTokenStream, expectedTokenStream) {
		t.Errorf("expected %#v got %#v", expectedTokenStream[3], ouputTokenStream[3])
	}
}
