tree - example_test.go

     1  package tree_test
     2  
     3  import (
     4  	"bytes"
     5  	"fmt"
     6  
     7  	"vimagination.zapto.org/tree"
     8  )
     9  
    10  func Example() {
    11  	var (
    12  		buf, readBuf bytes.Buffer
    13  		root         tree.Branch
    14  		branch       tree.Branch
    15  	)
    16  
    17  	root.Add("child1", tree.Leaf([]byte("Hello")))
    18  	root.Add("child2", tree.Leaf([]byte("World")))
    19  	root.Add("branch1", &branch)
    20  
    21  	branch.Add("childA", tree.Leaf([]byte("Foo")))
    22  	branch.Add("childB", tree.Leaf([]byte("Bar")))
    23  
    24  	tree.Serialise(&buf, root)
    25  
    26  	t := tree.OpenAt(bytes.NewReader(buf.Bytes()), int64(buf.Len()))
    27  
    28  	child1, _ := t.Child("child1")
    29  
    30  	child1.WriteTo(&readBuf)
    31  
    32  	fmt.Printf("child 1 data: %q\n", readBuf.Bytes())
    33  
    34  	readBuf.Reset()
    35  
    36  	branch1, _ := t.Child("branch1")
    37  	childB, _ := branch1.Child("childB")
    38  
    39  	childB.WriteTo(&readBuf)
    40  
    41  	fmt.Printf("child B data: %q\n", readBuf.Bytes())
    42  
    43  	// Output:
    44  	// child 1 data: "Hello"
    45  	// child B data: "Bar"
    46  }
    47