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package text_test
import (
"encoding/binary"
"jinx/pkg/lang/vm/code"
"jinx/pkg/lang/vm/text"
"math"
"strings"
"testing"
"github.com/stretchr/testify/require"
)
func TestSimple(t *testing.T) {
src := `
add
sub
ret
`
c := text.NewCompiler(strings.NewReader(src))
res, err := c.Compile()
require.NoError(t, err)
parts := [][]byte{
opBin(code.OpAdd),
opBin(code.OpSub),
opBin(code.OpRet),
}
require.Equal(t, joinSlices(parts), res.Code())
}
func TestInt(t *testing.T) {
src := `
push_int 1
push_int 2
add
ret
`
c := text.NewCompiler(strings.NewReader(src))
res, err := c.Compile()
require.NoError(t, err)
parts := [][]byte{
opBin(code.OpPushInt),
uintBin(1),
opBin(code.OpPushInt),
uintBin(2),
opBin(code.OpAdd),
opBin(code.OpRet),
}
require.Equal(t, joinSlices(parts), res.Code())
}
func TestFloat(t *testing.T) {
src := `
push_float 3.1415
push_float -2.71828
`
c := text.NewCompiler(strings.NewReader(src))
res, err := c.Compile()
require.NoError(t, err)
parts := [][]byte{
opBin(code.OpPushFloat),
floatBin(3.1415),
opBin(code.OpPushFloat),
floatBin(-2.71828),
}
require.Equal(t, joinSlices(parts), res.Code())
}
func TestString(t *testing.T) {
src := `
push_string "Hello, "
push_string "world!"
add
`
c := text.NewCompiler(strings.NewReader(src))
res, err := c.Compile()
require.NoError(t, err)
parts := [][]byte{
opBin(code.OpPushString),
stringBin("Hello, "),
opBin(code.OpPushString),
stringBin("world!"),
opBin(code.OpAdd),
}
require.Equal(t, joinSlices(parts), res.Code())
}
func TestLabels(t *testing.T) {
src := `
@1:
nop
@2:
nop
@3:
nop
jmp @1
jmp @2
jmp @3
`
c := text.NewCompiler(strings.NewReader(src))
res, err := c.Compile()
require.NoError(t, err)
parts := [][]byte{
opBin(code.OpNop),
opBin(code.OpNop),
opBin(code.OpNop),
opBin(code.OpJmp),
uintBin(0),
opBin(code.OpJmp),
uintBin(1),
opBin(code.OpJmp),
uintBin(2),
}
require.Equal(t, joinSlices(parts), res.Code())
}
func opBin(op code.Op) []byte {
return []byte{byte(op)}
}
func uintBin(x uint64) []byte {
res := make([]byte, 8)
binary.LittleEndian.PutUint64(res, x)
return res
}
func floatBin(x float64) []byte {
res := make([]byte, 8)
binary.LittleEndian.PutUint64(res, math.Float64bits(x))
return res
}
func stringBin(x string) []byte {
res := []byte(x)
res = append(res, 0)
return res
}
func joinSlices[T any](slices [][]T) []T {
res := []T{}
for _, slice := range slices {
res = append(res, slice...)
}
return res
}
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