spf13--viper/internal/encoding/yaml/codec_test.go

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package yaml
import (
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
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// original form of the data.
const original = `# key-value pair
key: value
list:
- item1
- item2
- item3
map:
key: value
# nested
# map
nested_map:
map:
key: value
list:
- item1
- item2
- item3
`
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// encoded form of the data.
const encoded = `key: value
list:
- item1
- item2
- item3
map:
key: value
nested_map:
map:
key: value
list:
- item1
- item2
- item3
`
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// decoded form of the data.
//
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// In case of YAML it's slightly different from Viper's internal representation
// (e.g. map is decoded into a map with interface key).
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var decoded = map[string]any{
"key": "value",
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"list": []any{
"item1",
"item2",
"item3",
},
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"map": map[string]any{
"key": "value",
},
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"nested_map": map[string]any{
"map": map[string]any{
"key": "value",
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"list": []any{
"item1",
"item2",
"item3",
},
},
},
}
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// data is Viper's internal representation.
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var data = map[string]any{
"key": "value",
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"list": []any{
"item1",
"item2",
"item3",
},
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"map": map[string]any{
"key": "value",
},
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"nested_map": map[string]any{
"map": map[string]any{
"key": "value",
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"list": []any{
"item1",
"item2",
"item3",
},
},
},
}
func TestCodec_Encode(t *testing.T) {
codec := Codec{}
b, err := codec.Encode(data)
require.NoError(t, err)
assert.Equal(t, encoded, string(b))
}
func TestCodec_Decode(t *testing.T) {
t.Run("OK", func(t *testing.T) {
codec := Codec{}
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v := map[string]any{}
err := codec.Decode([]byte(original), v)
require.NoError(t, err)
assert.Equal(t, decoded, v)
})
t.Run("InvalidData", func(t *testing.T) {
codec := Codec{}
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v := map[string]any{}
err := codec.Decode([]byte(`invalid data`), v)
require.Error(t, err)
t.Logf("decoding failed as expected: %s", err)
})
}