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package scanner_test
import (
"jinx/pkg/lang/scanner"
"jinx/pkg/lang/scanner/token"
"strings"
"testing"
"github.com/stretchr/testify/require"
)
func TestBasic(t *testing.T) {
source := `
fn basic() {
var x = 1
var y = x + 1
if x < y {
say("x is less than y")
} else {
say("x is greater than or equal to y")
}
return true
}`
s := scanner.New(strings.NewReader(source))
tokens, err := s.Scan()
require.NoError(t, err)
expected := []token.Token{
token.Simple(token.EOL, token.NewLoc(0, 0)),
token.Simple(token.KwFn, token.NewLoc(1, 1)),
token.New(token.Ident, token.NewLoc(1, 4), "basic"),
token.Simple(token.LParen, token.NewLoc(1, 9)),
token.Simple(token.RParen, token.NewLoc(1, 10)),
token.Simple(token.LBrace, token.NewLoc(1, 12)),
token.Simple(token.EOL, token.NewLoc(1, 13)),
token.Simple(token.KwVar, token.NewLoc(2, 2)),
token.New(token.Ident, token.NewLoc(2, 6), "x"),
token.Simple(token.Assign, token.NewLoc(2, 8)),
token.New(token.Int, token.NewLoc(2, 10), uint64(1)),
token.Simple(token.EOL, token.NewLoc(2, 11)),
token.Simple(token.KwVar, token.NewLoc(3, 2)),
token.New(token.Ident, token.NewLoc(3, 6), "y"),
token.Simple(token.Assign, token.NewLoc(3, 8)),
token.New(token.Ident, token.NewLoc(3, 10), "x"),
token.Simple(token.Plus, token.NewLoc(3, 12)),
token.New(token.Int, token.NewLoc(3, 14), uint64(1)),
token.Simple(token.EOL, token.NewLoc(3, 15)),
token.Simple(token.KwIf, token.NewLoc(4, 2)),
token.New(token.Ident, token.NewLoc(4, 5), "x"),
token.Simple(token.Lt, token.NewLoc(4, 7)),
token.New(token.Ident, token.NewLoc(4, 9), "y"),
token.Simple(token.LBrace, token.NewLoc(4, 11)),
token.Simple(token.EOL, token.NewLoc(4, 12)),
token.New(token.Ident, token.NewLoc(5, 3), "say"),
token.Simple(token.LParen, token.NewLoc(5, 6)),
token.New(token.String, token.NewLoc(5, 7), "x is less than y"),
token.Simple(token.RParen, token.NewLoc(5, 25)),
token.Simple(token.EOL, token.NewLoc(5, 26)),
token.Simple(token.RBrace, token.NewLoc(6, 2)),
token.Simple(token.KwElse, token.NewLoc(6, 4)),
token.Simple(token.LBrace, token.NewLoc(6, 9)),
token.Simple(token.EOL, token.NewLoc(6, 10)),
token.New(token.Ident, token.NewLoc(7, 3), "say"),
token.Simple(token.LParen, token.NewLoc(7, 6)),
token.New(token.String, token.NewLoc(7, 7), "x is greater than or equal to y"),
token.Simple(token.RParen, token.NewLoc(7, 40)),
token.Simple(token.EOL, token.NewLoc(7, 41)),
token.Simple(token.RBrace, token.NewLoc(8, 2)),
token.Simple(token.EOL, token.NewLoc(8, 3)),
token.Simple(token.KwReturn, token.NewLoc(9, 2)),
token.Simple(token.KwTrue, token.NewLoc(9, 9)),
token.Simple(token.EOL, token.NewLoc(9, 13)),
token.Simple(token.RBrace, token.NewLoc(10, 1)),
token.Simple(token.EOF, token.NewLoc(10, 2)),
}
require.Equal(t, expected, tokens)
}
func TestTightIdent(t *testing.T) {
source := `say(message)`
s := scanner.New(strings.NewReader(source))
tokens, err := s.Scan()
require.NoError(t, err)
expected := []token.Token{
token.New(token.Ident, token.NewLoc(0, 0), "say"),
token.Simple(token.LParen, token.NewLoc(0, 3)),
token.New(token.Ident, token.NewLoc(0, 4), "message"),
token.Simple(token.RParen, token.NewLoc(0, 11)),
token.Simple(token.EOF, token.NewLoc(0, 12)),
}
require.Equal(t, expected, tokens)
}
func TestTightNumber(t *testing.T) {
source := `1+2+3`
s := scanner.New(strings.NewReader(source))
tokens, err := s.Scan()
require.NoError(t, err)
expected := []token.Token{
token.New(token.Int, token.NewLoc(0, 0), uint64(1)),
token.Simple(token.Plus, token.NewLoc(0, 1)),
token.New(token.Int, token.NewLoc(0, 2), uint64(2)),
token.Simple(token.Plus, token.NewLoc(0, 3)),
token.New(token.Int, token.NewLoc(0, 4), uint64(3)),
token.Simple(token.EOF, token.NewLoc(0, 5)),
}
require.Equal(t, expected, tokens)
}
func TestNewlineStacking(t *testing.T) {
source := `
x
y
`
s := scanner.New(strings.NewReader(source))
tokens, err := s.Scan()
require.NoError(t, err)
expected := []token.Token{
token.Simple(token.EOL, token.NewLoc(0, 0)),
token.New(token.Ident, token.NewLoc(1, 1), "x"),
token.Simple(token.EOL, token.NewLoc(1, 2)),
token.New(token.Ident, token.NewLoc(4, 1), "y"),
token.Simple(token.EOL, token.NewLoc(4, 2)),
token.Simple(token.EOF, token.NewLoc(5, 1)),
}
require.Equal(t, expected, tokens)
}
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