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|
package compiler_test
import (
"fmt"
"jinx/pkg/lang/compiler"
"jinx/pkg/lang/parser"
"jinx/pkg/lang/scanner"
"jinx/pkg/lang/vm/text"
"strings"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestSimpleAddExpr(t *testing.T) {
src := `
1 + 2
`
expected := `
push_int 2
push_int 1
add
`
mustCompileTo(t, src, expected)
}
func TestOperationOrder(t *testing.T) {
grouped := `
(((1 + 2) - 3) + 4)
`
free := `
1 + 2 - 3 + 4
`
expected := `
push_int 4
push_int 3
push_int 2
push_int 1
add
sub
add
`
mustCompileTo(t, grouped, expected)
mustCompileTo(t, free, expected)
}
func TestNestedExpr(t *testing.T) {
// Yeah, we don't compile identifiers yet, so here we call and index directly on literals.
src := `
1 + 2 - 3 - (123("a", "b", "c") + 456[321])
`
expected := `
push_int 321
push_int 456
index
push_string "c"
push_string "b"
push_string "a"
push_int 123
call 3
add
push_int 3
push_int 2
push_int 1
add
sub
sub
`
mustCompileTo(t, src, expected)
}
func mustCompileTo(t *testing.T, src, expected string) {
scanner := scanner.New(strings.NewReader(src))
tokens, err := scanner.Scan()
require.NoError(t, err)
parser := parser.New(tokens)
program, err := parser.Parse()
require.NoError(t, err)
// spew.Dump(program)
fmt.Printf("%#v\n", program)
langCompiler := compiler.New(program)
testResult, err := langCompiler.Compile()
require.NoError(t, err)
textCompiler := text.NewCompiler(strings.NewReader(expected))
expectedResult, err := textCompiler.Compile()
require.NoError(t, err)
if !assert.Equal(t, expectedResult.Code(), testResult.Code()) {
d1 := text.NewDecompiler(expectedResult)
d2 := text.NewDecompiler(testResult)
require.Equal(t, d1.Decompile(), d2.Decompile())
}
}
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