Refactor network to a top-level module

testlib/capture_output.go

@@ -0,0 +1,42 @@
+package testlib
+
+import (
+	"bytes"
+	"io"
+	"os"
+	"strings"
+)
+
+func CaptureStdout(callback func()) string {
+	return captureOutput(&os.Stdout, callback)
+}
+
+func CaptureStderr(callback func()) string {
+	return captureOutput(&os.Stderr, callback)
+}
+
+func captureOutput(filefp **os.File, callback func()) string {
+	oldFp := *filefp
+
+	defer func() {
+		*filefp = oldFp
+	}()
+
+	reader, writer, _ := os.Pipe()
+	buf := &bytes.Buffer{}
+	closeChan := make(chan bool)
+
+	go func() {
+		io.Copy(buf, reader) // nolint: errcheck
+		close(closeChan)
+	}()
+
+	*filefp = writer
+
+	callback()
+
+	writer.Close()
+	<-closeChan
+
+	return strings.TrimSpace(buf.String())
+}

testlib/net_conn_mock.go

@@ -0,0 +1,48 @@
+package testlib
+
+import (
+	"net"
+	"time"
+
+	"github.com/stretchr/testify/mock"
+)
+
+type NetConnMock struct {
+	mock.Mock
+}
+
+func (n *NetConnMock) Read(b []byte) (int, error) {
+	args := n.Called(b)
+
+	return args.Int(0), args.Error(1)
+}
+
+func (n *NetConnMock) Write(b []byte) (int, error) {
+	args := n.Called(b)
+
+	return args.Int(0), args.Error(1)
+}
+
+func (n *NetConnMock) Close() error {
+	return n.Called().Error(0)
+}
+
+func (n *NetConnMock) LocalAddr() net.Addr {
+	return n.Called().Get(0).(net.Addr)
+}
+
+func (n *NetConnMock) RemoteAddr() net.Addr {
+	return n.Called().Get(0).(net.Addr)
+}
+
+func (n *NetConnMock) SetDeadline(t time.Time) error {
+	return n.Called(t).Error(0)
+}
+
+func (n *NetConnMock) SetReadDeadline(t time.Time) error {
+	return n.Called(t).Error(0)
+}
+
+func (n *NetConnMock) SetWriteDeadline(t time.Time) error {
+	return n.Called(t).Error(0)
+}

testlib/network_mock.go

@@ -0,0 +1,35 @@
+package testlib
+
+import (
+	"context"
+	"net"
+	"net/http"
+	"time"
+
+	"github.com/stretchr/testify/mock"
+)
+
+type NetworkMock struct {
+	mock.Mock
+}
+
+func (n *NetworkMock) Dial(network, address string) (net.Conn, error) {
+	args := n.Called(network, address)
+
+	return args.Get(0).(net.Conn), args.Error(1)
+}
+
+func (n *NetworkMock) DialContext(ctx context.Context, network, address string) (net.Conn, error) {
+	args := n.Called(ctx, network, address)
+
+	return args.Get(0).(net.Conn), args.Error(1)
+}
+
+func (n *NetworkMock) MakeHTTPClient(dialFunc func(ctx context.Context,
+	network, address string) (net.Conn, error)) *http.Client {
+	return n.Called(dialFunc).Get(0).(*http.Client)
+}
+
+func (n *NetworkMock) IdleTimeout() time.Duration {
+	return n.Called().Get(0).(time.Duration)
+}