github.com/SagerNet/gvisor@v0.0.0-20210707092255-7731c139d75c/pkg/state/tests/array_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 allArrayPrimitives = []interface{}{
    23  	[1]bool{},
    24  	[1]bool{true},
    25  	[2]bool{false, true},
    26  	[1]int{},
    27  	[1]int{1},
    28  	[2]int{0, 1},
    29  	[1]int8{},
    30  	[1]int8{1},
    31  	[2]int8{0, 1},
    32  	[1]int16{},
    33  	[1]int16{1},
    34  	[2]int16{0, 1},
    35  	[1]int32{},
    36  	[1]int32{1},
    37  	[2]int32{0, 1},
    38  	[1]int64{},
    39  	[1]int64{1},
    40  	[2]int64{0, 1},
    41  	[1]uint{},
    42  	[1]uint{1},
    43  	[2]uint{0, 1},
    44  	[1]uintptr{},
    45  	[1]uintptr{1},
    46  	[2]uintptr{0, 1},
    47  	[1]uint8{},
    48  	[1]uint8{1},
    49  	[2]uint8{0, 1},
    50  	[1]uint16{},
    51  	[1]uint16{1},
    52  	[2]uint16{0, 1},
    53  	[1]uint32{},
    54  	[1]uint32{1},
    55  	[2]uint32{0, 1},
    56  	[1]uint64{},
    57  	[1]uint64{1},
    58  	[2]uint64{0, 1},
    59  	[1]string{},
    60  	[1]string{""},
    61  	[1]string{nonEmptyString},
    62  	[2]string{"", nonEmptyString},
    63  }
    64  
    65  func TestArrayPrimitives(t *testing.T) {
    66  	runTestCases(t, false, "plain", flatten(allArrayPrimitives))
    67  	runTestCases(t, false, "pointers", pointersTo(flatten(allArrayPrimitives)))
    68  	runTestCases(t, false, "interfaces", interfacesTo(flatten(allArrayPrimitives)))
    69  	runTestCases(t, false, "interfacesToPointers", interfacesTo(pointersTo(flatten(allArrayPrimitives))))
    70  }
    71  
    72  func TestSlices(t *testing.T) {
    73  	var allSlices = flatten(
    74  		filter(allArrayPrimitives, func(o interface{}) (interface{}, bool) {
    75  			v := reflect.New(reflect.TypeOf(o)).Elem()
    76  			v.Set(reflect.ValueOf(o))
    77  			return v.Slice(0, v.Len()).Interface(), true
    78  		}),
    79  		filter(allArrayPrimitives, func(o interface{}) (interface{}, bool) {
    80  			v := reflect.New(reflect.TypeOf(o)).Elem()
    81  			v.Set(reflect.ValueOf(o))
    82  			if v.Len() == 0 {
    83  				// Return the pure "nil" value for the slice.
    84  				return reflect.New(v.Slice(0, 0).Type()).Elem().Interface(), true
    85  			}
    86  			return v.Slice(1, v.Len()).Interface(), true
    87  		}),
    88  		filter(allArrayPrimitives, func(o interface{}) (interface{}, bool) {
    89  			v := reflect.New(reflect.TypeOf(o)).Elem()
    90  			v.Set(reflect.ValueOf(o))
    91  			if v.Len() == 0 {
    92  				// Return the zero-valued slice.
    93  				return reflect.MakeSlice(v.Slice(0, 0).Type(), 0, 0).Interface(), true
    94  			}
    95  			return v.Slice(0, v.Len()-1).Interface(), true
    96  		}),
    97  	)
    98  	runTestCases(t, false, "plain", allSlices)
    99  	runTestCases(t, false, "pointers", pointersTo(allSlices))
   100  	runTestCases(t, false, "interfaces", interfacesTo(allSlices))
   101  	runTestCases(t, false, "interfacesToPointers", interfacesTo(pointersTo(allSlices)))
   102  }
   103  
   104  func TestArrayContainers(t *testing.T) {
   105  	var (
   106  		emptyArray [1]interface{}
   107  		fullArray  [1]interface{}
   108  	)
   109  	fullArray[0] = &emptyArray
   110  	runTestCases(t, false, "", []interface{}{
   111  		arrayContainer{v: emptyArray},
   112  		arrayContainer{v: fullArray},
   113  		arrayPtrContainer{v: nil},
   114  		arrayPtrContainer{v: &emptyArray},
   115  		arrayPtrContainer{v: &fullArray},
   116  	})
   117  }
   118  
   119  func TestSliceContainers(t *testing.T) {
   120  	var (
   121  		nilSlice   []interface{}
   122  		emptySlice = make([]interface{}, 0)
   123  		fullSlice  = []interface{}{nil}
   124  	)
   125  	runTestCases(t, false, "", []interface{}{
   126  		sliceContainer{v: nilSlice},
   127  		sliceContainer{v: emptySlice},
   128  		sliceContainer{v: fullSlice},
   129  		slicePtrContainer{v: nil},
   130  		slicePtrContainer{v: &nilSlice},
   131  		slicePtrContainer{v: &emptySlice},
   132  		slicePtrContainer{v: &fullSlice},
   133  	})
   134  }