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package tests
import (
"fmt"
"testing"
)
func TestRequiredField(t *testing.T) {
cases := []struct{ json, errorMessage string }{
{`{"first_name":"Foo", "last_name": "Bar"}`, ""},
{`{"last_name":"Bar"}`, "key 'first_name' is required"},
{"{}", "key 'first_name' is required"},
}
for _, tc := range cases {
var v RequiredOptionalStruct
err := v.UnmarshalJSON([]byte(tc.json))
if tc.errorMessage == "" {
if err != nil {
t.Errorf("%s. UnmarshalJSON didn`t expect error: %v", tc.json, err)
}
} else {
if fmt.Sprintf("%v", err) != tc.errorMessage {
t.Errorf("%s. UnmarshalJSON expected error: %v. got: %v", tc.json, tc.errorMessage, err)
}
}
}
}
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