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// Copyright (c) 2017 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 de
import (
"reflect"
"testing"
"github.com/blevesearch/bleve/analysis"
)
func TestGermanNormalizeFilter(t *testing.T) {
tests := []struct {
input analysis.TokenStream
output analysis.TokenStream
}{
// Tests that a/o/u + e is equivalent to the umlaut form
{
input: analysis.TokenStream{
&analysis.Token{
Term: []byte("Schaltflächen"),
},
},
output: analysis.TokenStream{
&analysis.Token{
Term: []byte("Schaltflachen"),
},
},
},
{
input: analysis.TokenStream{
&analysis.Token{
Term: []byte("Schaltflaechen"),
},
},
output: analysis.TokenStream{
&analysis.Token{
Term: []byte("Schaltflachen"),
},
},
},
// Tests the specific heuristic that ue is not folded after a vowel or q.
{
input: analysis.TokenStream{
&analysis.Token{
Term: []byte("dauer"),
},
},
output: analysis.TokenStream{
&analysis.Token{
Term: []byte("dauer"),
},
},
},
// Tests german specific folding of sharp-s
{
input: analysis.TokenStream{
&analysis.Token{
Term: []byte("weißbier"),
},
},
output: analysis.TokenStream{
&analysis.Token{
Term: []byte("weissbier"),
},
},
},
// empty
{
input: analysis.TokenStream{
&analysis.Token{
Term: []byte(""),
},
},
output: analysis.TokenStream{
&analysis.Token{
Term: []byte(""),
},
},
},
}
germanNormalizeFilter := NewGermanNormalizeFilter()
for _, test := range tests {
actual := germanNormalizeFilter.Filter(test.input)
if !reflect.DeepEqual(actual, test.output) {
t.Errorf("expected %#v, got %#v", test.output, actual)
t.Errorf("expected %s(% x), got %s(% x)", test.output[0].Term, test.output[0].Term, actual[0].Term, actual[0].Term)
}
}
}
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