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pointer_test.go
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pointer_test.go
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// Copyright Istio Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package ptr
import (
"testing"
"github.com/google/go-cmp/cmp"
"istio.io/istio/pkg/test"
)
// Cannot use assert.assertEqual due to import loop
func assertEqual[T any](t test.Failer, a, b T) {
t.Helper()
if !cmp.Equal(a, b) {
t.Fatalf("Left: %v\nRight: %v", a, b)
}
}
func TestEmpty(t *testing.T) {
type ts struct{}
assertEqual(t, Empty[string](), "")
assertEqual(t, Empty[int](), 0)
assertEqual(t, Empty[ts](), ts{})
assertEqual(t, Empty[*ts](), nil)
}
func TestOf(t *testing.T) {
one := 1
assertEqual(t, Of(1), &one)
}
func TestOrDefault(t *testing.T) {
one := 1
assertEqual(t, OrDefault(nil, 2), 2)
assertEqual(t, OrDefault(&one, 2), 1)
}
func TestOrEmpty(t *testing.T) {
one := 1
assertEqual(t, OrEmpty[int](nil), 0)
assertEqual(t, OrEmpty(&one), 1)
}
func TestTypeName(t *testing.T) {
type ts struct{}
assertEqual(t, TypeName[int](), "int")
assertEqual(t, TypeName[string](), "string")
assertEqual(t, TypeName[ts](), "ptr.ts")
assertEqual(t, TypeName[*ts](), "*ptr.ts")
}