e2e test to cover logs -f managing service being added/scaled

Signed-off-by: Nicolas De Loof <nicolas.deloof@gmail.com>

pkg/compose/logs.go

@@ -45,15 +45,9 @@ func (s *composeService) Logs(
 		return err
 	}
 
-	project := options.Project
-	if project == nil {
-		project, err = s.getProjectWithResources(ctx, containers, projectName)
-		if err != nil {
-			return err
-		}
-	} else if len(options.Services) == 0 {
+	if options.Project != nil && len(options.Services) == 0 {
 		// we run with an explicit compose.yaml, so only consider services defined in this file
-		options.Services = project.ServiceNames()
+		options.Services = options.Project.ServiceNames()
 		containers = containers.filter(isService(options.Services...))
 	}
 

pkg/e2e/fixtures/logs-test/compose.yaml

@@ -1,7 +1,7 @@
 services:
   ping:
     image: alpine
-    command: ping localhost -c 1
+    command: ping localhost -c ${REPEAT:-1}
   hello:
     image: alpine
     command: echo hello

pkg/e2e/logs_test.go

@@ -17,10 +17,13 @@
 package e2e
 
 import (
+	"fmt"
 	"strings"
 	"testing"
+	"time"
 
 	"gotest.tools/v3/assert"
+	"gotest.tools/v3/poll"
 
 	"gotest.tools/v3/icmd"
 )
@@ -56,3 +59,42 @@ func TestLocalComposeLogs(t *testing.T) {
 		_ = c.RunDockerComposeCmd(t, "--project-name", projectName, "down")
 	})
 }
+
+func TestLocalComposeLogsFollow(t *testing.T) {
+	c := NewCLI(t, WithEnv("REPEAT=20"))
+	const projectName = "compose-e2e-logs"
+	t.Cleanup(func() {
+		c.RunDockerComposeCmd(t, "--project-name", projectName, "down")
+	})
+
+	c.RunDockerComposeCmd(t, "-f", "./fixtures/logs-test/compose.yaml", "--project-name", projectName, "up", "-d", "ping")
+
+	cmd := c.NewDockerComposeCmd(t, "--project-name", projectName, "logs", "-f")
+	res := icmd.StartCmd(cmd)
+	t.Cleanup(func() {
+		_ = res.Cmd.Process.Kill()
+	})
+
+	expected := fmt.Sprintf("%s-ping-1 ", projectName)
+	poll.WaitOn(t, expectOutput(res, expected), poll.WithDelay(100*time.Millisecond), poll.WithTimeout(1*time.Second))
+
+	c.RunDockerComposeCmd(t, "-f", "./fixtures/logs-test/compose.yaml", "--project-name", projectName, "up", "-d")
+
+	expected = fmt.Sprintf("%s-hello-1 ", projectName)
+	poll.WaitOn(t, expectOutput(res, expected), poll.WithDelay(100*time.Millisecond), poll.WithTimeout(1*time.Second))
+
+	c.RunDockerComposeCmd(t, "-f", "./fixtures/logs-test/compose.yaml", "--project-name", projectName, "up", "-d", "--scale", "ping=2", "ping")
+
+	expected = fmt.Sprintf("%s-ping-2 ", projectName)
+	poll.WaitOn(t, expectOutput(res, expected), poll.WithDelay(100*time.Millisecond), poll.WithTimeout(20*time.Second))
+}
+
+func expectOutput(res *icmd.Result, expected string) func(t poll.LogT) poll.Result {
+	return func(t poll.LogT) poll.Result {
+		if strings.Contains(res.Stdout(), expected) {
+			return poll.Success()
+		}
+		return poll.Continue("condition not met")
+
+	}
+}