Add e2e tests

Signed-off-by: Bryan Frimin <bryan@getprobo.com>

pkg/probod/probod.go

@@ -61,7 +61,9 @@ import (
 
 type (
 	Implm struct {
-		cfg config
+		cfg       config
+		ready     chan struct{}
+		readyOnce sync.Once
 	}
 
 	config struct {
@@ -89,10 +91,12 @@ type (
 var (
 	_ unit.Configurable = (*Implm)(nil)
 	_ unit.Runnable     = (*Implm)(nil)
+	_ unit.Readyable    = (*Implm)(nil)
 )
 
 func New() *Implm {
 	return &Implm{
+		ready: make(chan struct{}),
 		cfg: config{
 			BaseURL: baseurl.MustParse("http://localhost:8080"),
 			Api: apiConfig{
@@ -173,6 +177,18 @@ func (impl *Implm) GetConfiguration() any {
 	return &impl.cfg
 }
 
+// GetAPIAddr returns the API server address (e.g., "localhost:8080").
+// This is useful for tests to know which address to connect to.
+func (impl *Implm) GetAPIAddr() string {
+	return impl.cfg.Api.Addr
+}
+
+// Ready returns a channel that is closed when the server is ready to accept requests.
+// This implements the unit.Readyable interface for testing purposes.
+func (impl *Implm) Ready() <-chan struct{} {
+	return impl.ready
+}
+
 func (impl *Implm) Run(
 	parentCtx context.Context,
 	l *log.Logger,
@@ -578,6 +594,11 @@ func (impl *Implm) runApiServer(
 	l.Info("api server started")
 	span.AddEvent("API server started")
 
+	// Signal that the server is ready to accept requests
+	impl.readyOnce.Do(func() {
+		close(impl.ready)
+	})
+
 	select {
 	case err := <-serverErrCh:
 		if err != nil {

pkg/ref/ref.go

@@ -0,0 +1,21 @@
+// Copyright (c) 2025 Probo Inc <hello@getprobo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+// Package ref provides helper functions for working with pointers.
+package ref
+
+// Ref returns a pointer to the given value.
+func Ref[T any](v T) *T {
+	return &v
+}