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|
package xreflect_test
import (
"testing"
"github.com/stretchr/testify/require"
"github.com/ydb-platform/ydb/library/go/x/xreflect"
)
type Foo struct {
S string
}
var _ InterfaceFoo = &Foo{}
func (f *Foo) FuncFoo() {}
type InterfaceFoo interface {
FuncFoo()
}
type Bar struct {
I int
}
var _ InterfaceBar = &Bar{}
func (f *Bar) FuncBar() {}
type InterfaceBar interface {
FuncBar()
}
func TestAssign(t *testing.T) {
t.Run("ValueToValue", func(t *testing.T) {
src := Foo{S: "S"}
var dst Foo
require.True(t, xreflect.Assign(src, &dst))
require.Equal(t, src, dst)
})
t.Run("ValueToValueInvalid", func(t *testing.T) {
src := Foo{S: "S"}
var dst Bar
require.False(t, xreflect.Assign(src, &dst))
require.Equal(t, Bar{}, dst)
})
t.Run("ValueToInterface", func(t *testing.T) {
src := Foo{S: "S"}
var dst InterfaceFoo
require.True(t, xreflect.Assign(&src, &dst))
require.NotNil(t, dst)
v, ok := dst.(*Foo)
require.True(t, ok)
require.Equal(t, &src, v)
})
t.Run("ValueToInterfaceInvalid", func(t *testing.T) {
src := Bar{I: 42}
var dst InterfaceFoo
require.False(t, xreflect.Assign(&src, &dst))
require.Nil(t, dst)
})
t.Run("InterfaceToInterface", func(t *testing.T) {
src := InterfaceFoo(&Foo{S: "S"})
var dst InterfaceFoo
require.True(t, xreflect.Assign(src, &dst))
require.NotNil(t, dst)
require.Equal(t, src, dst)
v, ok := dst.(*Foo)
require.True(t, ok)
require.Equal(t, src, v)
})
t.Run("InterfaceToInterfaceInvalid", func(t *testing.T) {
src := InterfaceFoo(&Foo{S: "S"})
var dst InterfaceBar
require.False(t, xreflect.Assign(src, &dst))
require.Nil(t, dst)
})
}
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