Improve test coverage by mocking exec output

main.go

@@ -186,10 +186,7 @@ func (job ContainerExecJob) Run() {
 
 		// Maybe print output
 		if hj.Reader != nil {
-			slog.Debugf("%s: Getting exec reader", job.name)
 			for scanner.Scan() {
-				slog.Debugf("%s: Getting exec line", job.name)
-
 				line := scanner.Text()
 				if len(line) > 0 {
 					slog.Infof("%s: Exec output: %s", job.name, line)

main_test.go

@@ -1,11 +1,13 @@
 package main
 
 import (
+	"bufio"
 	"errors"
 	"fmt"
 	"log"
 	"reflect"
 	"sort"
+	"strings"
 	"testing"
 
 	dockerTypes "github.com/docker/docker/api/types"
@@ -145,7 +147,9 @@ func (fakeClient *FakeDockerClient) ContainerInspect(ctx context.Context, contai
 }
 
 func (fakeClient *FakeDockerClient) ContainerExecAttach(ctx context.Context, execID string, options container.ExecAttachOptions) (dockerTypes.HijackedResponse, error) {
-	return dockerTypes.HijackedResponse{}, nil
+	return dockerTypes.HijackedResponse{
+		Reader: bufio.NewReader(strings.NewReader("Some output from our command")),
+	}, nil
 }
 
 // NewFakeDockerClient creates an empty client