Current File : //usr/local/go119/src/internal/reflectlite/set_test.go
// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package reflectlite_test
import (
"bytes"
"go/ast"
"go/token"
. "internal/reflectlite"
"io"
"testing"
)
func TestImplicitSetConversion(t *testing.T) {
// Assume TestImplicitMapConversion covered the basics.
// Just make sure conversions are being applied at all.
var r io.Reader
b := new(bytes.Buffer)
rv := ValueOf(&r).Elem()
rv.Set(ValueOf(b))
if r != b {
t.Errorf("after Set: r=%T(%v)", r, r)
}
}
var implementsTests = []struct {
x any
t any
b bool
}{
{new(*bytes.Buffer), new(io.Reader), true},
{new(bytes.Buffer), new(io.Reader), false},
{new(*bytes.Buffer), new(io.ReaderAt), false},
{new(*ast.Ident), new(ast.Expr), true},
{new(*notAnExpr), new(ast.Expr), false},
{new(*ast.Ident), new(notASTExpr), false},
{new(notASTExpr), new(ast.Expr), false},
{new(ast.Expr), new(notASTExpr), false},
{new(*notAnExpr), new(notASTExpr), true},
{new(mapError), new(error), true},
{new(*mapError), new(error), true},
}
type notAnExpr struct{}
func (notAnExpr) Pos() token.Pos { return token.NoPos }
func (notAnExpr) End() token.Pos { return token.NoPos }
func (notAnExpr) exprNode() {}
type notASTExpr interface {
Pos() token.Pos
End() token.Pos
exprNode()
}
type mapError map[string]string
func (mapError) Error() string { return "mapError" }
var _ error = mapError{}
var _ error = new(mapError)
func TestImplements(t *testing.T) {
for _, tt := range implementsTests {
xv := TypeOf(tt.x).Elem()
xt := TypeOf(tt.t).Elem()
if b := xv.Implements(xt); b != tt.b {
t.Errorf("(%s).Implements(%s) = %v, want %v", TypeString(xv), TypeString(xt), b, tt.b)
}
}
}
var assignableTests = []struct {
x any
t any
b bool
}{
{new(chan int), new(<-chan int), true},
{new(<-chan int), new(chan int), false},
{new(*int), new(IntPtr), true},
{new(IntPtr), new(*int), true},
{new(IntPtr), new(IntPtr1), false},
{new(Ch), new(<-chan any), true},
// test runs implementsTests too
}
type IntPtr *int
type IntPtr1 *int
type Ch <-chan any
func TestAssignableTo(t *testing.T) {
for i, tt := range append(assignableTests, implementsTests...) {
xv := TypeOf(tt.x).Elem()
xt := TypeOf(tt.t).Elem()
if b := xv.AssignableTo(xt); b != tt.b {
t.Errorf("%d:AssignableTo: got %v, want %v", i, b, tt.b)
}
}
}
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