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analysis/token/shingle/shingle_test.go Normal file
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// 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 shingle
import (
"reflect"
"testing"
"github.com/blevesearch/bleve/v2/analysis"
)
func TestShingleFilter(t *testing.T) {
tests := []struct {
min int
max int
outputOriginal bool
separator string
filler string
input analysis.TokenStream
output analysis.TokenStream
}{
{
min: 2,
max: 2,
outputOriginal: false,
separator: " ",
filler: "_",
input: analysis.TokenStream{
&analysis.Token{
Term: []byte("the"),
},
&analysis.Token{
Term: []byte("quick"),
},
&analysis.Token{
Term: []byte("brown"),
},
&analysis.Token{
Term: []byte("fox"),
},
},
output: analysis.TokenStream{
&analysis.Token{
Term: []byte("the quick"),
Type: analysis.Shingle,
},
&analysis.Token{
Term: []byte("quick brown"),
Type: analysis.Shingle,
},
&analysis.Token{
Term: []byte("brown fox"),
Type: analysis.Shingle,
},
},
},
{
min: 3,
max: 3,
outputOriginal: false,
separator: " ",
filler: "_",
input: analysis.TokenStream{
&analysis.Token{
Term: []byte("the"),
},
&analysis.Token{
Term: []byte("quick"),
},
&analysis.Token{
Term: []byte("brown"),
},
&analysis.Token{
Term: []byte("fox"),
},
},
output: analysis.TokenStream{
&analysis.Token{
Term: []byte("the quick brown"),
Type: analysis.Shingle,
},
&analysis.Token{
Term: []byte("quick brown fox"),
Type: analysis.Shingle,
},
},
},
{
min: 2,
max: 3,
outputOriginal: false,
separator: " ",
filler: "_",
input: analysis.TokenStream{
&analysis.Token{
Term: []byte("the"),
},
&analysis.Token{
Term: []byte("quick"),
},
&analysis.Token{
Term: []byte("brown"),
},
&analysis.Token{
Term: []byte("fox"),
},
},
output: analysis.TokenStream{
&analysis.Token{
Term: []byte("the quick"),
Type: analysis.Shingle,
},
&analysis.Token{
Term: []byte("quick brown"),
Type: analysis.Shingle,
},
&analysis.Token{
Term: []byte("the quick brown"),
Type: analysis.Shingle,
},
&analysis.Token{
Term: []byte("brown fox"),
Type: analysis.Shingle,
},
&analysis.Token{
Term: []byte("quick brown fox"),
Type: analysis.Shingle,
},
},
},
{
min: 3,
max: 3,
outputOriginal: false,
separator: " ",
filler: "_",
input: analysis.TokenStream{
&analysis.Token{
Term: []byte("ugly"),
Position: 1,
},
&analysis.Token{
Term: []byte("quick"),
Position: 3,
},
&analysis.Token{
Term: []byte("brown"),
Position: 4,
},
},
output: analysis.TokenStream{
&analysis.Token{
Term: []byte("ugly _ quick"),
Type: analysis.Shingle,
Position: 1,
},
&analysis.Token{
Term: []byte("_ quick brown"),
Type: analysis.Shingle,
Position: 3,
},
},
},
{
min: 1,
max: 5,
outputOriginal: false,
separator: " ",
filler: "_",
input: analysis.TokenStream{
&analysis.Token{
Term: []byte("test"),
Position: 1,
},
&analysis.Token{
Term: []byte("text"),
Position: 2,
},
// token 3 removed by stop filter
&analysis.Token{
Term: []byte("see"),
Position: 4,
},
&analysis.Token{
Term: []byte("shingles"),
Position: 5,
},
},
output: analysis.TokenStream{
&analysis.Token{
Term: []byte("test"),
Type: analysis.Shingle,
Position: 1,
},
&analysis.Token{
Term: []byte("text"),
Type: analysis.Shingle,
Position: 2,
},
&analysis.Token{
Term: []byte("test text"),
Type: analysis.Shingle,
Position: 1,
},
&analysis.Token{
Term: []byte("_"),
Type: analysis.Shingle,
},
&analysis.Token{
Term: []byte("text _"),
Type: analysis.Shingle,
Position: 2,
},
&analysis.Token{
Term: []byte("test text _"),
Type: analysis.Shingle,
Position: 1,
},
&analysis.Token{
Term: []byte("see"),
Type: analysis.Shingle,
Position: 4,
},
&analysis.Token{
Term: []byte("_ see"),
Type: analysis.Shingle,
Position: 4,
},
&analysis.Token{
Term: []byte("text _ see"),
Type: analysis.Shingle,
Position: 2,
},
&analysis.Token{
Term: []byte("test text _ see"),
Type: analysis.Shingle,
Position: 1,
},
&analysis.Token{
Term: []byte("shingles"),
Type: analysis.Shingle,
Position: 5,
},
&analysis.Token{
Term: []byte("see shingles"),
Type: analysis.Shingle,
Position: 4,
},
&analysis.Token{
Term: []byte("_ see shingles"),
Type: analysis.Shingle,
Position: 4,
},
&analysis.Token{
Term: []byte("text _ see shingles"),
Type: analysis.Shingle,
Position: 2,
},
&analysis.Token{
Term: []byte("test text _ see shingles"),
Type: analysis.Shingle,
Position: 1,
},
},
},
{
min: 2,
max: 2,
outputOriginal: true,
separator: " ",
filler: "_",
input: analysis.TokenStream{
&analysis.Token{
Term: []byte("the"),
},
&analysis.Token{
Term: []byte("quick"),
},
&analysis.Token{
Term: []byte("brown"),
},
&analysis.Token{
Term: []byte("fox"),
},
},
output: analysis.TokenStream{
&analysis.Token{
Term: []byte("the"),
},
&analysis.Token{
Term: []byte("quick"),
},
&analysis.Token{
Term: []byte("the quick"),
Type: analysis.Shingle,
},
&analysis.Token{
Term: []byte("brown"),
},
&analysis.Token{
Term: []byte("quick brown"),
Type: analysis.Shingle,
},
&analysis.Token{
Term: []byte("fox"),
},
&analysis.Token{
Term: []byte("brown fox"),
Type: analysis.Shingle,
},
},
},
}
for _, test := range tests {
shingleFilter := NewShingleFilter(test.min, test.max, test.outputOriginal, test.separator, test.filler)
actual := shingleFilter.Filter(test.input)
if !reflect.DeepEqual(actual, test.output) {
t.Errorf("expected %s, got %s", test.output, actual)
}
}
}
// TestShingleFilterBug431 tests that the shingle filter is in fact stateless
// by making using the same filter instance twice and ensuring we do not get
// contaminated output
func TestShingleFilterBug431(t *testing.T) {
tests := []struct {
input analysis.TokenStream
output analysis.TokenStream
}{
{
input: analysis.TokenStream{
&analysis.Token{
Term: []byte("the"),
},
&analysis.Token{
Term: []byte("quick"),
},
&analysis.Token{
Term: []byte("brown"),
},
&analysis.Token{
Term: []byte("fox"),
},
},
output: analysis.TokenStream{
&analysis.Token{
Term: []byte("the quick"),
Type: analysis.Shingle,
},
&analysis.Token{
Term: []byte("quick brown"),
Type: analysis.Shingle,
},
&analysis.Token{
Term: []byte("brown fox"),
Type: analysis.Shingle,
},
},
},
{
input: analysis.TokenStream{
&analysis.Token{
Term: []byte("a"),
},
&analysis.Token{
Term: []byte("sad"),
},
&analysis.Token{
Term: []byte("dirty"),
},
&analysis.Token{
Term: []byte("sock"),
},
},
output: analysis.TokenStream{
&analysis.Token{
Term: []byte("a sad"),
Type: analysis.Shingle,
},
&analysis.Token{
Term: []byte("sad dirty"),
Type: analysis.Shingle,
},
&analysis.Token{
Term: []byte("dirty sock"),
Type: analysis.Shingle,
},
},
},
}
shingleFilter := NewShingleFilter(2, 2, false, " ", "_")
for _, test := range tests {
actual := shingleFilter.Filter(test.input)
if !reflect.DeepEqual(actual, test.output) {
t.Errorf("expected %s, got %s", test.output, actual)
}
}
}