github.com/aacfactory/fns@v1.2.86-0.20240310083819-80d667fc0a17/commons/container/trees/convert_test.go (about)

     1  /*
     2   * Copyright 2023 Wang Min Xiang
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   * 	http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   *
    16   */
    17  
    18  package trees_test
    19  
    20  import (
    21  	"encoding/json"
    22  	"fmt"
    23  	"github.com/aacfactory/fns/commons/container/trees"
    24  	"testing"
    25  )
    26  
    27  type Nodes []*Node
    28  
    29  func (nodes Nodes) Len() int {
    30  	return len(nodes)
    31  }
    32  
    33  func (nodes Nodes) Less(i, j int) bool {
    34  	return nodes[i].Id < nodes[j].Id
    35  }
    36  
    37  func (nodes Nodes) Swap(i, j int) {
    38  	nodes[i], nodes[j] = nodes[j], nodes[i]
    39  	return
    40  }
    41  
    42  type Node struct {
    43  	Id       string `tree:"Parent+Children"`
    44  	Parent   string
    45  	Children Nodes
    46  }
    47  
    48  func TestConvertListToTree(t *testing.T) {
    49  	nodes := []Node{
    50  		{Id: "C", Parent: "D"},
    51  		{Id: "A", Parent: ""},
    52  		{Id: "A2", Parent: "A"},
    53  		{Id: "A1", Parent: "A"},
    54  		{Id: "A12", Parent: "A1"},
    55  		{Id: "A11", Parent: "A1"},
    56  		{Id: "B1", Parent: "B"},
    57  		{Id: "B1", Parent: "B"},
    58  		{Id: "B", Parent: ""},
    59  	}
    60  	v, treesErr := trees.ConvertListToTree[Node](nodes)
    61  	if treesErr != nil {
    62  		t.Errorf("%+v", treesErr)
    63  		return
    64  	}
    65  	p, err := json.MarshalIndent(v, "", "\t")
    66  	if err != nil {
    67  		t.Errorf("%+v", err)
    68  		return
    69  	}
    70  	fmt.Println(string(p))
    71  }