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34 lines
911 B
Go
34 lines
911 B
Go
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package mergo
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import (
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"testing"
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)
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type Foo struct {
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Str string
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Bslice []byte
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}
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func TestIssue33Merge(t *testing.T) {
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dest := Foo{Str: "a"}
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toMerge := Foo{
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Str: "b",
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Bslice: []byte{1, 2},
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}
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if err := Merge(&dest, toMerge); err != nil {
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t.Errorf("Error while merging: %s", err)
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}
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// Merge doesn't overwrite an attribute if in destination it doesn't have a zero value.
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// In this case, Str isn't a zero value string.
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if dest.Str != "a" {
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t.Errorf("dest.Str should have not been override as it has a non-zero value: dest.Str(%v) != 'a'", dest.Str)
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}
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// If we want to override, we must use MergeWithOverwrite or Merge using WithOverride.
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if err := Merge(&dest, toMerge, WithOverride); err != nil {
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t.Errorf("Error while merging: %s", err)
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}
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if dest.Str != toMerge.Str {
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t.Errorf("dest.Str should have been override: dest.Str(%v) != toMerge.Str(%v)", dest.Str, toMerge.Str)
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}
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}
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