package main

import (
	"fmt"
	"strings"
	"testing"
)

func TestWords(t *testing.T) {
	input := `
      hello world
      i have s           ome things
   `
	got := words([]byte(input))
	want := [][]byte{
		[]byte("hello"),
		[]byte("world"),
		[]byte("i"),
		[]byte("have"),
		[]byte("s"),
		[]byte("ome"),
		[]byte("things"),
	}
	if fmt.Sprint(got) != fmt.Sprint(want) {
		t.Fatal(want, got)
	}
}

func TestLines(t *testing.T) {
	s := `

      hello world
   `
	scanner := strings.NewReader(s)
	line, _ := nextLine(scanner)
	if strings.TrimSpace(string(line)) != "hello world" {
		t.Fatalf("%q", line)
	}
	if string(line) == strings.TrimSpace(string(line)) {
		t.Fatalf("%q", line)
	}
}

func TestTwoReadTransaction(t *testing.T) {
	input := `
      date1 desc1
          payee1 $1.00
          payer1
      date2 desc2
          payee2 $2.00
          payer2
   `
	r := strings.NewReader(input)
	got1, _ := readTransaction(r)
	got2, _ := readTransaction(r)
	t.Logf("%+v", got1)
	t.Logf("%+v", got2)
}

func TestReadTransaction(t *testing.T) {
	cases := map[string]struct {
		input string
		want  Transaction
	}{
		"ez": {
			input: `
            2021-07-01 description

               payee $1.00
               payer
         `,
			want: Transaction{
				Date:        "2021-07-01",
				Description: "description",
				Payee:       "payee",
				Amount:      1.00,
				Payer:       "payer",
			},
		},
	}

	for name, d := range cases {
		c := d
		t.Run(name, func(t *testing.T) {
			got, err := readTransaction(strings.NewReader(c.input))
			if err != nil {
				t.Fatal(err)
			}
			if got != c.want {
				t.Fatalf("\n%s =!> %+v, got %+v", c.input, c.want, got)
			}
		})
	}
}