forms/forms_test.go

package forms

import (
	"reflect"
	"testing"
)

type testStruct struct {
	A string
	B int
	C float64
	D nested

	Anon

	PA *string
	PD *nested

	SA []string
	SB []int
	SC []float64
}

type nested struct {
	A string
	B int
	C float64
}

type Anon struct {
	E string
}

var input = Values{
	`A`: {`test`},
	`B`: {`10`},
	`C`: {`1.25`},

	`D.A`: {`test2`},
	`D.B`: {`20`},
	`D.C`: {`2.50`},

	`E`: {`test3`},

	`PA`: {`test4`},

	`PD.A`: {`test5`},
	`PD.B`: {`30`},
	`PD.C`: {`3.75`},

	`SA`: {`test6`, `slice`},
	`SB`: {`3`, `2`},
	`SC`: {`4.50`, `1.32`},
}

var expected = testStruct{
	A: `test`,
	B: 10,
	C: 1.25,

	D: nested{A: `test2`, B: 20, C: 2.50},

	Anon: Anon{E: `test3`},

	SA: []string{`test6`, `slice`},
	SB: []int{3, 2},
	SC: []float64{4.50, 1.32},
}

var expectedPA = `test4`
var expectedPD = nested{`test5`, 30, 3.75}

func TestDecode(t *testing.T) {
	data := testStruct{}

	_ = Decode(input, &data)

	if *data.PA != expectedPA {
		t.Errorf(`PA was incorrect. Expected %v but got %v`, expectedPA, *data.PA)
	}
	if *data.PD != expectedPD {
		t.Errorf(`PA was incorrect. Expected %v but got %v`, expectedPD, *data.PD)
	}

	expected.PA, expected.PD = data.PA, data.PD
	if !reflect.DeepEqual(&data, &expected) {
		t.Errorf("Data dit not match expected output. Expected \n%v\nbut got\n%v", expected, data)
	}
}

func TestDecodeError(t *testing.T) {
	var data struct {
		A struct {
			B float64
		}
	}

	err := Decode(Values{`A.B`: {`a`}}, &data)

	if err == nil {
		t.Error(`Expected error but got nil`)
	}

	t.Log(err)
}