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|
package compiler_test
import (
"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 1
push_int 2
add
halt
`
mustCompileTo(t, src, expected)
}
func TestOperationOrder(t *testing.T) {
grouped := `
(((1 + 2) - 3) + 4)
`
free := `
1 + 2 - 3 + 4
`
expected := `
push_int 1
push_int 2
add
push_int 3
sub
push_int 4
add
halt
`
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 1
push_int 2
add
push_int 3
sub
push_int 123
push_string "a"
push_string "b"
push_string "c"
call 3
push_int 456
push_int 321
index
add
sub
halt
`
mustCompileTo(t, src, expected)
}
func TestVars(t *testing.T) {
src := `
var x = 10
var y = 25
x = x + 7
var res = x + y
`
expected := `
push_int 10
push_int 25
get_local 0
push_int 7
add
set_local 0
get_local 0
get_local 1
add
halt
`
mustCompileTo(t, src, expected)
}
func TestIf(t *testing.T) {
src := `
":("
if 1 <= 5 {
"hello " + "world"
}
`
expected := `
push_string ":("
push_int 1
push_int 5
lte
jf @end
push_string "hello "
push_string "world"
add
@end:
halt
`
mustCompileTo(t, src, expected)
}
func TestIfElifElse(t *testing.T) {
src := `
if false {
1
} elif true {
2
} else {
3
}
`
expected := `
push_false
jf @elif
push_int 1
jmp @end
@elif:
push_true
jf @else
push_int 2
jmp @end
@else:
push_int 3
@end:
halt
`
mustCompileTo(t, src, expected)
}
func TestIfNoElse(t *testing.T) {
src := `
if false {
1
} elif true {
2
}
`
expected := `
push_false
jf @elif
push_int 1
jmp @end
@elif:
push_true
jf @end
push_int 2
@end:
halt
`
mustCompileTo(t, src, expected)
}
func TestNestedIfs(t *testing.T) {
src := `
if true {
if false {
1
} else {
2
}
}
`
expected := `
push_true
jf @end
push_false
jf @else
push_int 1
jmp @end
@else:
push_int 2
@end:
halt
`
mustCompileTo(t, src, expected)
}
func TestForCond(t *testing.T) {
src := `
for true {
for false {
1
}
}
`
expected := `
@start:
push_true
jf @end
@inner_start:
push_false
jf @inner_end
push_int 1
jmp @inner_start
@inner_end:
jmp @start
@end
halt
`
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)
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())
}
}
|
