mirror of https://github.com/grpc/grpc-go.git
129 lines
3.8 KiB
Go
129 lines
3.8 KiB
Go
/*
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*
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* Copyright 2019 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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package attributes_test
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import (
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"fmt"
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"testing"
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"google.golang.org/grpc/attributes"
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)
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type stringVal struct {
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s string
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}
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func (s stringVal) Equal(o any) bool {
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os, ok := o.(stringVal)
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return ok && s.s == os.s
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}
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type stringerVal struct {
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s string
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}
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func (s stringerVal) String() string {
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return s.s
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}
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func ExampleAttributes() {
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type keyOne struct{}
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type keyTwo struct{}
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a := attributes.New(keyOne{}, 1).WithValue(keyTwo{}, stringVal{s: "two"})
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fmt.Println("Key one:", a.Value(keyOne{}))
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fmt.Println("Key two:", a.Value(keyTwo{}))
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// Output:
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// Key one: 1
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// Key two: {two}
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}
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func ExampleAttributes_WithValue() {
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type keyOne struct{}
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type keyTwo struct{}
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a := attributes.New(keyOne{}, 1)
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a = a.WithValue(keyTwo{}, stringVal{s: "two"})
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fmt.Println("Key one:", a.Value(keyOne{}))
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fmt.Println("Key two:", a.Value(keyTwo{}))
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// Output:
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// Key one: 1
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// Key two: {two}
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}
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func ExampleAttributes_String() {
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type key struct{}
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var typedNil *stringerVal
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a1 := attributes.New(key{}, typedNil) // typed nil implements [fmt.Stringer]
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a2 := attributes.New(key{}, (*stringerVal)(nil)) // typed nil implements [fmt.Stringer]
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a3 := attributes.New(key{}, (*stringVal)(nil)) // typed nil not implements [fmt.Stringer]
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a4 := attributes.New(key{}, nil) // untyped nil
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a5 := attributes.New(key{}, 1)
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a6 := attributes.New(key{}, stringerVal{s: "two"})
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a7 := attributes.New(key{}, stringVal{s: "two"})
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a8 := attributes.New(1, true)
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fmt.Println("a1:", a1.String())
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fmt.Println("a2:", a2.String())
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fmt.Println("a3:", a3.String())
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fmt.Println("a4:", a4.String())
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fmt.Println("a5:", a5.String())
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fmt.Println("a6:", a6.String())
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fmt.Println("a7:", a7.String())
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fmt.Println("a8:", a8.String())
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// Output:
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// a1: {"<%!p(attributes_test.key={})>": "<nil>" }
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// a2: {"<%!p(attributes_test.key={})>": "<nil>" }
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// a3: {"<%!p(attributes_test.key={})>": "<0x0>" }
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// a4: {"<%!p(attributes_test.key={})>": "<%!p(<nil>)>" }
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// a5: {"<%!p(attributes_test.key={})>": "<%!p(int=1)>" }
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// a6: {"<%!p(attributes_test.key={})>": "two" }
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// a7: {"<%!p(attributes_test.key={})>": "<%!p(attributes_test.stringVal={two})>" }
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// a8: {"<%!p(int=1)>": "<%!p(bool=true)>" }
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}
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// Test that two attributes with the same content are Equal.
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func TestEqual(t *testing.T) {
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type keyOne struct{}
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type keyTwo struct{}
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a1 := attributes.New(keyOne{}, 1).WithValue(keyTwo{}, stringVal{s: "two"})
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a2 := attributes.New(keyOne{}, 1).WithValue(keyTwo{}, stringVal{s: "two"})
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if !a1.Equal(a2) {
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t.Fatalf("%+v.Equals(%+v) = false; want true", a1, a2)
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}
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if !a2.Equal(a1) {
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t.Fatalf("%+v.Equals(%+v) = false; want true", a2, a1)
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}
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}
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// Test that two attributes with different content are not Equal.
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func TestNotEqual(t *testing.T) {
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type keyOne struct{}
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type keyTwo struct{}
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a1 := attributes.New(keyOne{}, 1).WithValue(keyTwo{}, stringVal{s: "two"})
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a2 := attributes.New(keyOne{}, 2).WithValue(keyTwo{}, stringVal{s: "two"})
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a3 := attributes.New(keyOne{}, 1).WithValue(keyTwo{}, stringVal{s: "one"})
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if a1.Equal(a2) {
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t.Fatalf("%+v.Equals(%+v) = true; want false", a1, a2)
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}
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if a2.Equal(a1) {
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t.Fatalf("%+v.Equals(%+v) = true; want false", a2, a1)
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}
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if a3.Equal(a1) {
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t.Fatalf("%+v.Equals(%+v) = true; want false", a3, a1)
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}
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}
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