ctx_test.go

Documentation: go.etcd.io/etcd/client/v3

     1  // Copyright 2020 The etcd 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 clientv3
    16  
    17  import (
    18  	"context"
    19  	"reflect"
    20  	"testing"
    21  
    22  	"go.etcd.io/etcd/api/v3/v3rpc/rpctypes"
    23  	"go.etcd.io/etcd/api/v3/version"
    24  	"google.golang.org/grpc/metadata"
    25  )
    26  
    27  func TestMetadataWithRequireLeader(t *testing.T) {
    28  	ctx := context.TODO()
    29  	_, ok := metadata.FromOutgoingContext(ctx)
    30  	if ok {
    31  		t.Fatal("expected no outgoing metadata ctx key")
    32  	}
    33  
    34  	// add a conflicting key with some other value
    35  	md := metadata.Pairs(rpctypes.MetadataRequireLeaderKey, "invalid")
    36  	// add a key, and expect not be overwritten
    37  	md.Set("hello", "1", "2")
    38  	ctx = metadata.NewOutgoingContext(ctx, md)
    39  
    40  	// expect overwrites but still keep other keys
    41  	ctx = WithRequireLeader(ctx)
    42  	md, ok = metadata.FromOutgoingContext(ctx)
    43  	if !ok {
    44  		t.Fatal("expected outgoing metadata ctx key")
    45  	}
    46  	if ss := md.Get(rpctypes.MetadataRequireLeaderKey); !reflect.DeepEqual(ss, []string{rpctypes.MetadataHasLeader}) {
    47  		t.Fatalf("unexpected metadata for %q %v", rpctypes.MetadataRequireLeaderKey, ss)
    48  	}
    49  	if ss := md.Get("hello"); !reflect.DeepEqual(ss, []string{"1", "2"}) {
    50  		t.Fatalf("unexpected metadata for 'hello' %v", ss)
    51  	}
    52  }
    53  
    54  func TestMetadataWithClientAPIVersion(t *testing.T) {
    55  	ctx := withVersion(WithRequireLeader(context.TODO()))
    56  
    57  	md, ok := metadata.FromOutgoingContext(ctx)
    58  	if !ok {
    59  		t.Fatal("expected outgoing metadata ctx key")
    60  	}
    61  	if ss := md.Get(rpctypes.MetadataRequireLeaderKey); !reflect.DeepEqual(ss, []string{rpctypes.MetadataHasLeader}) {
    62  		t.Fatalf("unexpected metadata for %q %v", rpctypes.MetadataRequireLeaderKey, ss)
    63  	}
    64  	if ss := md.Get(rpctypes.MetadataClientAPIVersionKey); !reflect.DeepEqual(ss, []string{version.APIVersion}) {
    65  		t.Fatalf("unexpected metadata for %q %v", rpctypes.MetadataClientAPIVersionKey, ss)
    66  	}
    67  }
    68
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