json2go @ 1609c23952004c5a160a5737c4ac8e9fac80292b

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         	"encoding/json"

      
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         	"errors"

      
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         	"fmt"

      
        
        7
        +	"regexp"

      
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         	"sort"

      
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         	"strings"

      
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         )

      
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        -var ErrInvalidJSON = errors.New("invalid json")

      
        
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        +var identRe = regexp.MustCompile(`^[A-Za-z_][A-Za-z0-9_]*$`)

      
        
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        +var (

      
        
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        +	ErrInvalidJSON       = errors.New("invalid json")

      
        
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        +	ErrInvalidStructName = errors.New("invalid struct name")

      
        
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        +)

      
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         type Transformer struct {

      
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         	structName string

      ···
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         // Transform ...

      
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         // todo: take io.Reader as input?

      
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         // todo: output as io.Writer?

      
        24
        
        -// todo: validate provided structName

      
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         func (t *Transformer) Transform(structName, jsonStr string) (string, error) {

      
        
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        +	if !identRe.MatchString(structName) {

      
        
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        +		return "", ErrInvalidStructName

      
        
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        +	}

      
        
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        +

      
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         	t.structName = structName

      
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        35
         

      
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         	var input any

      ···
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         	}

      
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         }

      
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        -// todo: input shouldn't be map, to preserve it's order

      
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         func (t *Transformer) buildStruct(input map[string]any) string {

      
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         	var fields strings.Builder

      
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         	for _, f := range mapToStructInput(input) {

      

···
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        22
         

      
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         func TestTransformer_Transform(t *testing.T) {

      
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         	tests := map[string]struct {

      
        25
        
        -		input  string

      
        26
        
        -		output string

      
        27
        
        -		err    error

      
        
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        +		input      string

      
        
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        +		output     string

      
        
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        +		structName string

      
        
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        +		err        error

      
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         	}{

      
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         		"simple object": {

      
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         			input: `{"name": "Olex", "active": true, "age": 420}`,

      ···
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         		"invalid json": {

      
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         			err:   ErrInvalidJSON,

      
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         			input: `{"invalid":json}`,

      
        
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        +		},

      
        
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        +		"invalid struct name, starts with number": {

      
        
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        +			err:        ErrInvalidStructName,

      
        
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        +			structName: "1Name",

      
        
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        +		},

      
        
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        +		"invalid struct name, has space": {

      
        
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        +			err:        ErrInvalidStructName,

      
        
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        +			structName: "Name Name2",

      
        
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        +		},

      
        
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        +		"invalid struct name, has non letter/number": {

      
        
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        +			err:        ErrInvalidStructName,

      
        
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        +			structName: "Name$",

      
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         		},

      
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         		"snake_case to CamelCase": {

      
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         			input: `{"first_name": "Bob", "last_name": "Bobberson"}`,

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         	trans := NewTransformer()

      
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         	for tname, tt := range tests {

      
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         		t.Run(tname, func(t *testing.T) {

      
        96
        
        -			result, err := trans.Transform("Out", tt.input)

      
        
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        +			sn := "Out"

      
        
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        +			if tt.structName != "" {

      
        
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        +				sn = tt.structName

      
        
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        +			}

      
        
        113
        +

      
        
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        +			result, err := trans.Transform(sn, tt.input)

      
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         			assertEqualErr(t, tt.err, err)

      
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         			assertEqual(t, tt.output, result)

      
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         		})

      ···
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         func assertEqualErr(t *testing.T, expected, actual error) {

      
        104
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         	t.Helper()

      
        105
        
        -	if (expected != nil || actual != nil) && errors.Is(expected, actual) {

      
        106
        
        -		t.Errorf("expected: %v, got: %v\n", expected, actual)

      
        
        123
        +	if expected == nil && actual == nil {

      
        
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        +		return

      
        
        125
        +	}

      
        
        126
        +

      
        
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        +	if expected == nil || actual == nil {

      
        
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        +		t.Errorf("expected: %v, got: %v", expected, actual)

      
        
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        +		return

      
        
        130
        +	}

      
        
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        +

      
        
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        +	if !errors.Is(actual, expected) {

      
        
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        +		t.Errorf("expected error: %v, got: %v", expected, actual)

      
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         	}

      
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         }

      
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