package httphead

import (
	"bufio"
	"bytes"
	"fmt"
	"testing"
)

func ExampleWriteOptions() {
	opts := []Option{
		NewOption("foo", map[string]string{
			"param": "hello, world!",
		}),
		NewOption("bar", nil),
		NewOption("b a z", nil),
	}

	buf := bytes.Buffer{}
	bw := bufio.NewWriter(&buf)

	WriteOptions(bw, opts)
	bw.Flush()

	// Output: foo;param="hello, world!",bar,"b a z"
	fmt.Println(buf.String())
}

func TestWriteOptions(t *testing.T) {
	for _, test := range []struct {
		options []Option
		exp     string
	}{
		{
			options: []Option{
				NewOption("foo", map[string]string{"bar": "baz"}),
			},
			exp: "foo;bar=baz",
		},
		{
			options: []Option{
				NewOption("foo", map[string]string{"bar": "baz"}),
				NewOption("a", nil),
				NewOption("b", map[string]string{"c": "10"}),
			},
			exp: "foo;bar=baz,a,b;c=10",
		},
		{
			options: []Option{
				NewOption("foo", map[string]string{"a b c": "10,2"}),
			},
			exp: `foo;"a b c"="10,2"`,
		},
		{
			options: []Option{
				NewOption(`"foo"`, nil),
				NewOption(`"bar"`, nil),
			},
			exp: `"\"foo\"","\"bar\""`,
		},
	} {
		t.Run("", func(t *testing.T) {
			buf := bytes.Buffer{}
			bw := bufio.NewWriter(&buf)

			WriteOptions(bw, test.options)

			if err := bw.Flush(); err != nil {
				t.Fatal(err)
			}
			if act := buf.String(); act != test.exp {
				t.Errorf("WriteOptions = %#q; want %#q", act, test.exp)
			}
		})
	}
}