| // Copyright Istio Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package main |
| |
| import ( |
| "bufio" |
| "net" |
| "os" |
| "strings" |
| "testing" |
| "time" |
| ) |
| |
| // TestTcpEchoServer tests the behavior of the TCP Echo Server. |
| func TestTcpEchoServer(t *testing.T) { |
| // set up test parameters |
| prefix := "hello" |
| request := "world" |
| want := prefix + " " + request |
| |
| // start the TCP Echo Server |
| os.Args = []string{"main", "9000,9001", prefix} |
| go main() |
| |
| // wait for the TCP Echo Server to start |
| time.Sleep(2 * time.Second) |
| |
| for _, addr := range []string{":9000", ":9001"} { |
| // connect to the TCP Echo Server |
| conn, err := net.Dial("tcp", addr) |
| if err != nil { |
| t.Fatalf("couldn't connect to the server: %v", err) |
| } |
| defer conn.Close() |
| |
| // test the TCP Echo Server output |
| if _, err := conn.Write([]byte(request + "\n")); err != nil { |
| t.Fatalf("couldn't send request: %v", err) |
| } else { |
| reader := bufio.NewReader(conn) |
| if response, err := reader.ReadBytes(byte('\n')); err != nil { |
| t.Fatalf("couldn't read server response: %v", err) |
| } else if !strings.HasPrefix(string(response), want) { |
| t.Errorf("output doesn't match, wanted: %s, got: %s", want, response) |
| } |
| } |
| } |
| } |