github.com/SagerNet/gvisor@v0.0.0-20210707092255-7731c139d75c/pkg/state/tests/map_test.go (about)

     1  // Copyright 2018 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package tests
    16  
    17  import (
    18  	"reflect"
    19  	"testing"
    20  )
    21  
    22  var allMapPrimitives = []interface{}{
    23  	bool(true),
    24  	int(1),
    25  	int8(1),
    26  	int16(1),
    27  	int32(1),
    28  	int64(1),
    29  	uint(1),
    30  	uintptr(1),
    31  	uint8(1),
    32  	uint16(1),
    33  	uint32(1),
    34  	uint64(1),
    35  	string(""),
    36  	registeredMapStruct{},
    37  }
    38  
    39  var allMapKeys = flatten(allMapPrimitives, pointersTo(allMapPrimitives))
    40  
    41  var allMapValues = flatten(allMapPrimitives, pointersTo(allMapPrimitives), interfacesTo(allMapPrimitives))
    42  
    43  var emptyMaps = combine(allMapKeys, allMapValues, func(v1, v2 interface{}) interface{} {
    44  	m := reflect.MakeMap(reflect.MapOf(reflect.TypeOf(v1), reflect.TypeOf(v2)))
    45  	return m.Interface()
    46  })
    47  
    48  var fullMaps = combine(allMapKeys, allMapValues, func(v1, v2 interface{}) interface{} {
    49  	m := reflect.MakeMap(reflect.MapOf(reflect.TypeOf(v1), reflect.TypeOf(v2)))
    50  	m.SetMapIndex(reflect.Zero(reflect.TypeOf(v1)), reflect.Zero(reflect.TypeOf(v2)))
    51  	return m.Interface()
    52  })
    53  
    54  func TestMapAliasing(t *testing.T) {
    55  	v := make(map[int]int)
    56  	ptrToV := &v
    57  	aliases := []map[int]int{v, v}
    58  	runTestCases(t, false, "", []interface{}{ptrToV, aliases})
    59  }
    60  
    61  func TestMapsEmpty(t *testing.T) {
    62  	runTestCases(t, false, "plain", emptyMaps)
    63  	runTestCases(t, false, "pointers", pointersTo(emptyMaps))
    64  	runTestCases(t, false, "interfaces", interfacesTo(emptyMaps))
    65  	runTestCases(t, false, "interfacesToPointers", interfacesTo(pointersTo(emptyMaps)))
    66  }
    67  
    68  func TestMapsFull(t *testing.T) {
    69  	runTestCases(t, false, "plain", fullMaps)
    70  	runTestCases(t, false, "pointers", pointersTo(fullMaps))
    71  	runTestCases(t, false, "interfaces", interfacesTo(fullMaps))
    72  	runTestCases(t, false, "interfacesToPointer", interfacesTo(pointersTo(fullMaps)))
    73  }
    74  
    75  func TestMapContainers(t *testing.T) {
    76  	var (
    77  		nilMap   map[int]interface{}
    78  		emptyMap = make(map[int]interface{})
    79  		fullMap  = map[int]interface{}{0: nil}
    80  	)
    81  	runTestCases(t, false, "", []interface{}{
    82  		mapContainer{v: nilMap},
    83  		mapContainer{v: emptyMap},
    84  		mapContainer{v: fullMap},
    85  		mapPtrContainer{v: nil},
    86  		mapPtrContainer{v: &nilMap},
    87  		mapPtrContainer{v: &emptyMap},
    88  		mapPtrContainer{v: &fullMap},
    89  	})
    90  }