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test that json decode will overlay properly #6

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Merged
algorandskiy merged 1 commit into from
Jan 31, 2023
Merged

test that json decode will overlay properly #6

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20 changes: 20 additions & 0 deletions netdeploy/networkTemplates_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -17,8 +17,10 @@
package netdeploy

import (
"encoding/json"
"os"
"path/filepath"
"strings"
"testing"

"github.com/stretchr/testify/require"
Expand Down Expand Up @@ -95,3 +97,21 @@ func TestValidate(t *testing.T) {
err = template.Validate()
a.NoError(err)
}

type overlayTestStruct struct {
A string
B string
}

// TestJsonOverlay ensures that encoding/json will only clobber fields present in the json and leave other fields unchanged
func TestJsonOverlay(t *testing.T) {
before := overlayTestStruct{A: "one", B: "two"}
setB := "{\"B\":\"other\"}"
dec := json.NewDecoder(strings.NewReader(setB))
after := before
err := dec.Decode(&after)
a := require.New(t)
a.NoError(err)
a.Equal("one", after.A)
a.Equal("other", after.B)
}