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// Copyright (c) 2022, Maxime Soulé
// All rights reserved.
//
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree.
package types_test
import (
"reflect"
"testing"
"github.com/maxatome/go-testdeep/internal/test"
"github.com/maxatome/go-testdeep/internal/types"
)
type compareType int
func (i compareType) Compare(j compareType) int {
if i < j {
return -1
}
if i > j {
return 1
}
return 0
}
type lessType int
func (i lessType) Less(j lessType) bool {
return i < j
}
type badType1 int
func (i badType1) Compare(j ...badType1) int { return 0 } // IsVariadic()
func (i badType1) Less(j, k badType1) bool { return false } // NumIn() == 3
type badType2 int
func (i badType2) Compare() int { return 0 } // NumIn() == 1
func (i badType2) Less(j badType2) {} // NumOut() == 0
type badType3 int
func (i badType3) Compare(j badType3) (int, int) { return 0, 0 } // NumOut() == 2
func (i badType3) Less(j int) bool { return false } // In(1) ≠ in
type badType4 int
func (i badType4) Compare(j badType4) bool { return false } // Out(0) ≠ out
func (i badType4) Less(j badType4) int { return 0 } // Out(0) ≠ out
func TestOrder(t *testing.T) {
if types.NewOrder(reflect.TypeOf(0)) != nil {
t.Error("types.NewOrder(int) returned non-nil func")
}
fn := types.NewOrder(reflect.TypeOf(compareType(0)))
if fn == nil {
t.Error("types.NewOrder(compareType) returned nil func")
} else {
a, b := reflect.ValueOf(compareType(1)), reflect.ValueOf(compareType(2))
test.EqualInt(t, fn(a, b), -1)
test.EqualInt(t, fn(b, a), 1)
test.EqualInt(t, fn(a, a), 0)
}
fn = types.NewOrder(reflect.TypeOf(lessType(0)))
if fn == nil {
t.Error("types.NewOrder(lessType) returned nil func")
} else {
a, b := reflect.ValueOf(lessType(1)), reflect.ValueOf(lessType(2))
test.EqualInt(t, fn(a, b), -1)
test.EqualInt(t, fn(b, a), 1)
test.EqualInt(t, fn(a, a), 0)
}
if types.NewOrder(reflect.TypeOf(badType1(0))) != nil {
t.Error("types.NewOrder(badType1) returned non-nil func")
}
if types.NewOrder(reflect.TypeOf(badType2(0))) != nil {
t.Error("types.NewOrder(badType2) returned non-nil func")
}
if types.NewOrder(reflect.TypeOf(badType3(0))) != nil {
t.Error("types.NewOrder(badType3) returned non-nil func")
}
if types.NewOrder(reflect.TypeOf(badType4(0))) != nil {
t.Error("types.NewOrder(badType4) returned non-nil func")
}
}
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