mirror of https://github.com/grpc/grpc-go.git
76 lines
2.0 KiB
Go
76 lines
2.0 KiB
Go
/*
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*
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* Copyright 2023 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 manual_test
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import (
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"errors"
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"testing"
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"google.golang.org/grpc"
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"google.golang.org/grpc/credentials/insecure"
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"google.golang.org/grpc/resolver"
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"google.golang.org/grpc/resolver/manual"
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)
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func TestResolver(t *testing.T) {
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r := manual.NewBuilderWithScheme("whatever")
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r.InitialState(resolver.State{
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Addresses: []resolver.Address{
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{Addr: "address"},
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},
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})
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t.Run("update_state_panics", func(t *testing.T) {
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defer func() {
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want := "cannot update state as grpc.Dial with resolver has not been called"
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if r := recover(); r != want {
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t.Errorf("expected panic %q, got %q", want, r)
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}
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}()
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r.UpdateState(resolver.State{Addresses: []resolver.Address{
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{Addr: "address"},
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{Addr: "anotheraddress"},
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}})
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})
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t.Run("report_error_panics", func(t *testing.T) {
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defer func() {
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want := "cannot report error as grpc.Dial with resolver has not been called"
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if r := recover(); r != want {
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t.Errorf("expected panic %q, got %q", want, r)
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}
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}()
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r.ReportError(errors.New("example"))
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})
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t.Run("happy_path", func(t *testing.T) {
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cc, err := grpc.NewClient("whatever://localhost",
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grpc.WithTransportCredentials(insecure.NewCredentials()),
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grpc.WithResolvers(r))
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if err != nil {
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t.Errorf("grpc.NewClient() failed: %v", err)
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}
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defer cc.Close()
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cc.Connect()
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r.UpdateState(resolver.State{Addresses: []resolver.Address{
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{Addr: "ok"},
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}})
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r.ReportError(errors.New("example"))
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})
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}
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