github.com/waldiirawan/apm-agent-go/v2@v2.2.2/internal/apmstrings/truncate_test.go (about)

     1  // Licensed to Elasticsearch B.V. under one or more contributor
     2  // license agreements. See the NOTICE file distributed with
     3  // this work for additional information regarding copyright
     4  // ownership. Elasticsearch B.V. licenses this file to you under
     5  // the Apache License, Version 2.0 (the "License"); you may
     6  // not use this file except in compliance with the License.
     7  // You may obtain a copy of the License at
     8  //
     9  //     http://www.apache.org/licenses/LICENSE-2.0
    10  //
    11  // Unless required by applicable law or agreed to in writing,
    12  // software distributed under the License is distributed on an
    13  // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    14  // KIND, either express or implied.  See the License for the
    15  // specific language governing permissions and limitations
    16  // under the License.
    17  
    18  package apmstrings_test
    19  
    20  import (
    21  	"testing"
    22  	"unicode/utf8"
    23  
    24  	"github.com/stretchr/testify/assert"
    25  
    26  	"github.com/waldiirawan/apm-agent-go/v2/internal/apmstrings"
    27  )
    28  
    29  func TestTruncate(t *testing.T) {
    30  	const limit = 2
    31  	test := func(name, in, expect string) {
    32  		t.Run(name, func(t *testing.T) {
    33  			out, n := apmstrings.Truncate(in, limit)
    34  			assert.Equal(t, expect, out)
    35  			assert.Equal(t, utf8.RuneCountInString(out), n)
    36  		})
    37  	}
    38  	test("empty", "", "")
    39  	test("limit_ascii", "xx", "xx")
    40  	test("limit_multibyte", "世界", "世界")
    41  	test("truncate_ascii", "xxx", "xx")
    42  	test("truncate_multibyte", "世界世", "世界")
    43  }