yaml_go110_test.go

Documentation: sigs.k8s.io/yaml

     1  //go:build go1.10
     2  // +build go1.10
     3  
     4  /*
     5  Copyright 2021 The Kubernetes Authors.
     6  
     7  Licensed under the Apache License, Version 2.0 (the "License");
     8  you may not use this file except in compliance with the License.
     9  You may obtain a copy of the License at
    10  
    11      http://www.apache.org/licenses/LICENSE-2.0
    12  
    13  Unless required by applicable law or agreed to in writing, software
    14  distributed under the License is distributed on an "AS IS" BASIS,
    15  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    16  See the License for the specific language governing permissions and
    17  limitations under the License.
    18  */
    19  
    20  package yaml
    21  
    22  import (
    23  	"fmt"
    24  	"testing"
    25  )
    26  
    27  func TestUnmarshalWithTags(t *testing.T) {
    28  	type WithTaggedField struct {
    29  		Field string `json:"field"`
    30  	}
    31  
    32  	t.Run("Known tagged field", func(t *testing.T) {
    33  		y := []byte(`field: "hello"`)
    34  		v := WithTaggedField{}
    35  		if err := Unmarshal(y, &v, DisallowUnknownFields); err != nil {
    36  			t.Errorf("unexpected error: %v", err)
    37  		}
    38  		if v.Field != "hello" {
    39  			t.Errorf("v.Field=%v, want 'hello'", v.Field)
    40  		}
    41  
    42  	})
    43  	t.Run("With unknown tagged field", func(t *testing.T) {
    44  		y := []byte(`unknown: "hello"`)
    45  		v := WithTaggedField{}
    46  		err := Unmarshal(y, &v, DisallowUnknownFields)
    47  		if err == nil {
    48  			t.Errorf("want error because of unknown field, got <nil>: v=%#v", v)
    49  		}
    50  	})
    51  
    52  }
    53  
    54  func exampleUnknown() {
    55  	type WithTaggedField struct {
    56  		Field string `json:"field"`
    57  	}
    58  	y := []byte(`unknown: "hello"`)
    59  	v := WithTaggedField{}
    60  	fmt.Printf("%v\n", Unmarshal(y, &v, DisallowUnknownFields))
    61  	// Ouptut:
    62  	// unmarshaling JSON: while decoding JSON: json: unknown field "unknown"
    63  }
    64
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