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package parse
import (
"reflect"
"testing"
"github.com/mmcloughlin/addchain/acc/ast"
)
func TestOperands(t *testing.T) {
exprs := map[string]ast.Expr{
"1": ast.Operand(0),
"[23]": ast.Operand(23),
"[0x2a]": ast.Operand(0x2a),
"[0644]": ast.Operand(0o644),
"(1)": ast.Operand(0),
"( [3] )": ast.Operand(3),
"_101": ast.Identifier("_101"),
"x5": ast.Identifier("x5"),
"( x5)": ast.Identifier("x5"),
}
for expr, idx := range exprs {
AssertParseResult(t, expr, idx)
AssertParseResult(t, expr+"\n", idx)
}
}
func TestExpressions(t *testing.T) {
cases := []struct {
Source string
Expect ast.Expr
}{
{
Source: "1 + 1",
Expect: ast.Add{X: ast.Operand(0), Y: ast.Operand(0)},
},
{
Source: "1 add 1",
Expect: ast.Add{X: ast.Operand(0), Y: ast.Operand(0)},
},
{
Source: "1 + 1 + 1",
Expect: ast.Add{
X: ast.Add{X: ast.Operand(0), Y: ast.Operand(0)},
Y: ast.Operand(0),
},
},
{
Source: "1 add 1 add 1",
Expect: ast.Add{
X: ast.Add{X: ast.Operand(0), Y: ast.Operand(0)},
Y: ast.Operand(0),
},
},
{
Source: "1 << 5",
Expect: ast.Shift{X: ast.Operand(0), S: 5},
},
{
Source: "[3] shl 5 add 1",
Expect: ast.Add{
X: ast.Shift{X: ast.Operand(3), S: 5},
Y: ast.Operand(0),
},
},
{
Source: "[3] << 5 + [6] << 9",
Expect: ast.Add{
X: ast.Shift{X: ast.Operand(3), S: 5},
Y: ast.Shift{X: ast.Operand(6), S: 9},
},
},
{
Source: "([3] + [8]) << 2",
Expect: ast.Shift{
X: ast.Add{X: ast.Operand(3), Y: ast.Operand(8)},
S: 2,
},
},
{
Source: "2 * [3]",
Expect: ast.Double{
X: ast.Operand(3),
},
},
{
Source: "dbl [3] add [5] << 3",
Expect: ast.Add{
X: ast.Double{X: ast.Operand(3)},
Y: ast.Shift{X: ast.Operand(5), S: 3},
},
},
}
for _, c := range cases {
AssertParseResult(t, c.Source, c.Expect)
}
}
func TestChains(t *testing.T) {
cases := []struct {
Source string
Expect *ast.Chain
}{
{
Source: "x = 1 + 1\nreturn x<<3",
Expect: &ast.Chain{
Statements: []ast.Statement{
{
Name: "x",
Expr: ast.Add{
X: ast.Operand(0),
Y: ast.Operand(0),
},
},
{
Expr: ast.Shift{
X: ast.Identifier("x"),
S: 3,
},
},
},
},
},
}
for _, c := range cases {
AssertParse(t, c.Source, c.Expect)
}
}
func AssertParseResult(t *testing.T, src string, expect ast.Expr) {
t.Helper()
AssertParse(t, src, &ast.Chain{
Statements: []ast.Statement{{Expr: expect}},
})
}
func AssertParse(t *testing.T, src string, expect *ast.Chain) {
t.Helper()
t.Logf("expr=%q", src)
got, err := String(src)
if err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(expect, got) {
t.Fatalf("got %#v; expected %#v", got, expect)
}
}
|
