148 lines
2.8 KiB
Go
148 lines
2.8 KiB
Go
// Copyright (c) 2014 Couchbase, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package edgengram
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import (
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"reflect"
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"testing"
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"github.com/blevesearch/bleve/analysis"
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)
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func TestEdgeNgramFilter(t *testing.T) {
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tests := []struct {
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side Side
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min int
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max int
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input analysis.TokenStream
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output analysis.TokenStream
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}{
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{
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side: FRONT,
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min: 1,
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max: 1,
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input: analysis.TokenStream{
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&analysis.Token{
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Term: []byte("abcde"),
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},
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},
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output: analysis.TokenStream{
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&analysis.Token{
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Term: []byte("a"),
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},
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},
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},
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{
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side: BACK,
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min: 1,
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max: 1,
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input: analysis.TokenStream{
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&analysis.Token{
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Term: []byte("abcde"),
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},
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},
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output: analysis.TokenStream{
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&analysis.Token{
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Term: []byte("e"),
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},
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},
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},
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{
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side: FRONT,
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min: 1,
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max: 3,
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input: analysis.TokenStream{
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&analysis.Token{
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Term: []byte("abcde"),
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},
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},
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output: analysis.TokenStream{
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&analysis.Token{
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Term: []byte("a"),
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},
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&analysis.Token{
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Term: []byte("ab"),
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},
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&analysis.Token{
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Term: []byte("abc"),
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},
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},
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},
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{
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side: BACK,
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min: 1,
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max: 3,
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input: analysis.TokenStream{
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&analysis.Token{
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Term: []byte("abcde"),
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},
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},
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output: analysis.TokenStream{
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&analysis.Token{
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Term: []byte("e"),
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},
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&analysis.Token{
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Term: []byte("de"),
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},
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&analysis.Token{
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Term: []byte("cde"),
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},
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},
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},
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{
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side: FRONT,
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min: 1,
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max: 3,
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input: analysis.TokenStream{
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&analysis.Token{
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Term: []byte("abcde"),
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},
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&analysis.Token{
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Term: []byte("vwxyz"),
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},
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},
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output: analysis.TokenStream{
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&analysis.Token{
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Term: []byte("a"),
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},
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&analysis.Token{
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Term: []byte("ab"),
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},
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&analysis.Token{
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Term: []byte("abc"),
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},
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&analysis.Token{
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Term: []byte("v"),
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},
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&analysis.Token{
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Term: []byte("vw"),
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},
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&analysis.Token{
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Term: []byte("vwx"),
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},
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},
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},
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}
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for _, test := range tests {
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edgeNgramFilter := NewEdgeNgramFilter(test.side, test.min, test.max)
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actual := edgeNgramFilter.Filter(test.input)
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if !reflect.DeepEqual(actual, test.output) {
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t.Errorf("expected %s, got %s", test.output, actual)
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}
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}
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}
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