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Copy pathset_struct_fields_test.go
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set_struct_fields_test.go
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package structs
import (
"testing"
"github.com/stretchr/testify/assert"
)
func Test_SetStructFields(t *testing.T) {
var pointerInt *int
tests := []struct {
name string
structure any
inputs map[string]any
settings Settings
expected any
wantErr error
}{
{
name: "non-pointer struct",
structure: struct{}{},
inputs: map[string]any{},
wantErr: ErrInputPointer,
},
{
name: "non-struct value",
structure: pointerInt,
inputs: map[string]any{},
wantErr: ErrInputPointerStruct,
},
{
name: "inputs as field names when AllowTagOverride is true",
structure: &struct {
Field1 string
Field2 int
}{},
settings: Settings{
AllowTagOverride: true,
},
inputs: map[string]any{
"Field1": "value101",
"Field2": 10,
},
expected: &struct {
Field1 string
Field2 int
}{Field1: "value101", Field2: 10},
},
{
name: "use last found tag when AllowTagOverride is true",
structure: &struct {
Field1 string `name:"field_1" tag2:"field_12" tag1:"field_11"`
Field2 int
}{},
settings: Settings{
TagOrder: []string{"json", "tag1", "tag2"},
AllowTagOverride: true,
},
inputs: map[string]any{
"field_1": "value100",
"field_11": "value1000",
"field_12": "value10000",
"Field2": 100,
},
expected: &struct {
Field1 string `name:"field_1" tag1:"field_11" tag2:"field_12"`
Field2 int
}{
Field1: "value10000",
Field2: 100,
},
},
{
name: "use first found tag when AllowTagOverride is false",
structure: &struct {
Field1 string `name:"field_1" tag1:"field_12" tag2:"field_11"`
Field2 int `name:"field_2" tag2:"field_22" tag1:"field_21"`
}{},
settings: Settings{
TagOrder: []string{"json", "tag1", "tag2"},
AllowTagOverride: true,
},
inputs: map[string]any{
"field_1": "value1000",
"field_11": "value10000",
"field_12": "value100000",
"field_2": 1000,
"field_21": 10000,
"field_22": 100000,
},
expected: &struct {
Field1 string `name:"field_1" tag1:"field_1" tag2:"field_1"`
Field2 int `name:"field_2" tag2:"field_2" tag2:"field_2"`
}{
Field1: "value10000",
Field2: 100000,
},
},
{
name: "nested struct",
structure: &struct {
Field1 string `name:"field_1"`
Field2 int `name:"field_2"`
Field3 struct {
Field1 string `name:"field_1"`
Field2 int `name:"field_2"`
} `name:"field_3"`
Field4 struct {
Field1 string `name:"field_1"`
Field2 int `name:"field_2"`
} `name:"field_4"`
}{},
settings: Settings{
TagOrder: []string{"name"},
AllowTagOverride: true,
},
inputs: map[string]any{
"field_1": "------",
"field_2": 11111,
"field_3.field_1": "field3::field_1",
"field_3.field_2": 10000,
"field_4.field_1": "field4::field_1",
"field_4.field_2": 100000,
},
expected: &struct {
Field1 string
Field2 int
Field3 struct {
Field1 string
Field2 int
}
Field4 struct {
Field1 string
Field2 int
}
}{
Field1: "------",
Field2: 11111,
Field3: struct {
Field1 string
Field2 int
}{
Field1: "field3::field_1",
Field2: 10000,
},
Field4: struct {
Field1 string
Field2 int
}{
Field1: "field4::field_1",
Field2: 100000,
},
},
},
{
name: "cli app struct by env only",
structure: &struct {
Inner struct {
ComplexFlag string `arg:"complex-flag" short:"c" env:"COMPLEX_FLAG"`
SimpleFlag bool `arg:"simple-flag" short:"s" env:"SIMPLE_FLAG"`
} `arg:"inner" short:"i" env:"INNER"`
Outer int `arg:"outer" short:"o" env:"OUTER"`
}{},
settings: Settings{
TagOrder: []string{"arg", "short"},
AllowEnvOverride: false,
},
inputs: map[string]any{
"INNER_COMPLEX_FLAG": "complex-flag-value-env",
"INNER_SIMPLE_FLAG": "yes",
"OUTER": 123,
"i.c": "i.c",
"i.s": "i.s",
"o": -1,
},
expected: &struct {
Inner struct {
ComplexFlag string `arg:"complex-flag" short:"c" env:"COMPLEX_FLAG"`
SimpleFlag bool `arg:"simple-flag" short:"s" env:"SIMPLE_FLAG"`
} `arg:"inner" short:"i" env:"INNER"`
Outer int `arg:"outer" short:"o" env:"OUTER"`
}{
Inner: struct {
ComplexFlag string `arg:"complex-flag" short:"c" env:"COMPLEX_FLAG"`
SimpleFlag bool `arg:"simple-flag" short:"s" env:"SIMPLE_FLAG"`
}{
ComplexFlag: "complex-flag-value-env",
SimpleFlag: true,
},
Outer: 123,
},
},
{
name: "cli app struct with env override by tag",
structure: &struct {
Inner struct {
ComplexFlag string `arg:"complex-flag" short:"c" env:"COMPLEX_FLAG" help:"Complex flag"`
SimpleFlag bool `arg:"simple-flag" short:"s" env:"SIMPLE_FLAG" help:"Simple flag"`
} `arg:"inner" short:"i" env:"INNER" help:"Inner app"`
Outer int `arg:"outer" short:"o" env:"OUTER" help:"Outer app"`
}{},
settings: Settings{
TagOrder: []string{"arg", "short"},
AllowEnvOverride: true,
// needs to be true to test from `arg` to `short` tag override
AllowTagOverride: true,
},
inputs: map[string]any{
"INNER_COMPLEX_FLAG": "envValue",
"INNER_SIMPLE_FLAG": "yes",
"OUTER": 123,
"i.c": "i.c",
"i.s": false,
"o": -1,
},
expected: &struct {
Inner struct {
ComplexFlag string `arg:"complex-flag" short:"c" env:"COMPLEX_FLAG" help:"Complex flag"`
SimpleFlag bool `arg:"simple-flag" short:"s" env:"SIMPLE_FLAG" help:"Simple flag"`
} `arg:"inner" short:"i" env:"INNER" help:"Inner app"`
Outer int `arg:"outer" short:"o" env:"OUTER" help:"Outer app"`
}{
Inner: struct {
ComplexFlag string `arg:"complex-flag" short:"c" env:"COMPLEX_FLAG" help:"Complex flag"`
SimpleFlag bool `arg:"simple-flag" short:"s" env:"SIMPLE_FLAG" help:"Simple flag"`
}{
ComplexFlag: "i.c",
SimpleFlag: false,
},
Outer: -1,
},
},
{
name: "ensure inner struct is not nil",
structure: &struct {
Inner struct {
A string
}
}{},
inputs: map[string]any{},
expected: &struct {
Inner struct {
A string
}
}{
Inner: struct {
A string
}{},
},
},
{
name: "default values are set",
structure: &struct {
Field1 string `name:"field_1" default:"default1"`
Field2 int `name:"field_2" default:"100"`
}{
Field1: "",
Field2: 0,
},
expected: &struct {
Field1 string `name:"field_1" default:"default1"`
Field2 int `name:"field_2" default:"100"`
}{
Field1: "default1",
Field2: 100,
},
},
{
name: "default values don't override existing values",
structure: &struct {
Field1 string `name:"field_1" default:"default1"`
Field2 int `name:"field_2" default:"100"`
Field3 bool `name:"field_3" default:"yes"`
}{
Field1: "pem",
Field2: 0,
Field3: false,
},
expected: &struct {
Field1 string `name:"field_1" default:"default1"`
Field2 int `name:"field_2" default:"100"`
Field3 bool `name:"field_3" default:"yes"`
}{
Field1: "pem",
Field2: 100,
Field3: true,
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
err := SetStructFields(tt.structure, tt.settings, tt.inputs)
if tt.wantErr != nil {
assert.ErrorIs(t, tt.wantErr, err)
return
}
assert.NoError(t, err)
assert.EqualValues(t, tt.expected, tt.structure)
})
}
}