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example_test.go
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example_test.go
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package service_test
import (
"context"
"errors"
"io"
"net"
"testing"
"github.com/ankorstore/yokai-grpc-template/internal"
"github.com/ankorstore/yokai-grpc-template/proto"
"github.com/ankorstore/yokai/log/logtest"
"github.com/ankorstore/yokai/trace/tracetest"
"github.com/stretchr/testify/assert"
"go.uber.org/fx"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials/insecure"
"google.golang.org/grpc/test/bufconn"
)
func TestExampleUnary(t *testing.T) {
var grpcServer *grpc.Server
var lis *bufconn.Listener
var logBuffer logtest.TestLogBuffer
var traceExporter tracetest.TestTraceExporter
internal.RunTest(t, fx.Populate(&grpcServer, &lis, &logBuffer, &traceExporter))
defer func() {
err := lis.Close()
assert.NoError(t, err)
grpcServer.GracefulStop()
}()
// client preparation
conn, err := prepareGrpcClientTestConnection(lis)
assert.NoError(t, err)
client := proto.NewExampleServiceClient(conn)
// call
response, err := client.ExampleUnary(context.Background(), &proto.ExampleRequest{
Text: "test",
})
assert.NoError(t, err)
// response assertions
assert.Equal(t, "response from grpc-app: you sent test", response.Text)
// logs assertions
logtest.AssertHasLogRecord(t, logBuffer, map[string]interface{}{
"level": "info",
"message": "received: test",
})
// traces assertions
tracetest.AssertHasTraceSpan(t, traceExporter, "ExampleUnary")
}
func TestTransformAndSplitText(t *testing.T) {
var grpcServer *grpc.Server
var lis *bufconn.Listener
var logBuffer logtest.TestLogBuffer
var traceExporter tracetest.TestTraceExporter
internal.RunTest(t, fx.Populate(&grpcServer, &lis, &logBuffer, &traceExporter))
defer func() {
err := lis.Close()
assert.NoError(t, err)
grpcServer.GracefulStop()
}()
// client preparation
conn, err := prepareGrpcClientTestConnection(lis)
assert.NoError(t, err)
client := proto.NewExampleServiceClient(conn)
// send
stream, err := client.ExampleStreaming(context.Background())
assert.NoError(t, err)
for _, text := range []string{"this", "is", "a", "test"} {
err = stream.Send(&proto.ExampleRequest{
Text: text,
})
assert.NoError(t, err)
}
err = stream.CloseSend()
assert.NoError(t, err)
// receive
var responses []*proto.ExampleResponse
wait := make(chan struct{})
go func() {
for {
resp, err := stream.Recv()
if errors.Is(err, io.EOF) {
break
}
assert.NoError(t, err)
responses = append(responses, resp)
}
close(wait)
}()
<-wait
// responses assertions
assert.Len(t, responses, 4)
assert.Equal(t, "response from grpc-app: you sent this", responses[0].Text)
assert.Equal(t, "response from grpc-app: you sent is", responses[1].Text)
assert.Equal(t, "response from grpc-app: you sent a", responses[2].Text)
assert.Equal(t, "response from grpc-app: you sent test", responses[3].Text)
// logs assertions
logtest.AssertHasLogRecord(t, logBuffer, map[string]interface{}{
"level": "info",
"message": "received: this",
})
logtest.AssertHasLogRecord(t, logBuffer, map[string]interface{}{
"level": "info",
"message": "received: is",
})
logtest.AssertHasLogRecord(t, logBuffer, map[string]interface{}{
"level": "info",
"message": "received: a",
})
logtest.AssertHasLogRecord(t, logBuffer, map[string]interface{}{
"level": "info",
"message": "received: test",
})
// traces assertions
tracetest.AssertHasTraceSpan(t, traceExporter, "ExampleStreaming")
span, err := traceExporter.Span("ExampleStreaming")
assert.NoError(t, err)
assert.Equal(t, "received: this", span.Events[0].Name)
assert.Equal(t, "received: is", span.Events[1].Name)
assert.Equal(t, "received: a", span.Events[2].Name)
assert.Equal(t, "received: test", span.Events[3].Name)
}
func prepareGrpcClientTestConnection(lis *bufconn.Listener) (*grpc.ClientConn, error) {
return grpc.DialContext(
context.Background(),
"",
grpc.WithContextDialer(func(context.Context, string) (net.Conn, error) {
return lis.Dial()
}),
grpc.WithTransportCredentials(insecure.NewCredentials()),
)
}