Add optional UDP protocol to port mapping class with TCP as default protocol

README.md

@@ -119,6 +119,14 @@ $containerInstance = DockerContainer::create($imageName)
     ->start();
 ```
 
+The default protocol for the port mapping is TCP. If you want to use UDP, you can pass it as the third argument.
+
+```php
+$containerInstance = DockerContainer::create($imageName)
+    ->mapPort($portOnHost, $portOnContainer, 'udp')
+    ->start();
+```
+
 #### Environment variables
 
 You can set environment variables using the `setEnvironmentVariable` method. To add multiple arguments, just call `setEnvironmentVariable` multiple times.

src/DockerContainer.php

@@ -135,9 +135,9 @@ public function doNotCleanUpAfterExit(): self
     /**
      * @param int|string $portOnHost
      */
-    public function mapPort($portOnHost, int $portOnDocker): self
+    public function mapPort($portOnHost, int $portOnDocker, string $protocol = 'tcp'): self
     {
-        $this->portMappings[] = new PortMapping($portOnHost, $portOnDocker);
+        $this->portMappings[] = new PortMapping($portOnHost, $portOnDocker, $protocol);
 
         return $this;
     }
@@ -285,7 +285,7 @@ public function start(): DockerContainerInstance
 
         $process->run();
 
-        if (! $process->isSuccessful()) {
+        if (!$process->isSuccessful()) {
             throw CouldNotStartDockerContainer::processFailed($this, $process);
         }
 

src/PortMapping.php

@@ -9,18 +9,22 @@ class PortMapping
 
     private int $portOnDocker;
 
+    private string $protocol;
+
     /**
      * @param int|string $portOnHost
      */
-    public function __construct($portOnHost, int $portOnDocker)
+    public function __construct($portOnHost, int $portOnDocker, string $protocol = 'tcp')
     {
         $this->portOnHost = $portOnHost;
 
         $this->portOnDocker = $portOnDocker;
+
+        $this->protocol = $protocol;
     }
 
     public function __toString()
     {
-        return "-p {$this->portOnHost}:{$this->portOnDocker}";
+        return "-p {$this->portOnHost}:{$this->portOnDocker}/{$this->protocol}";
     }
 }

tests/DockerContainerTest.php

@@ -56,7 +56,7 @@
         ->mapPort(9000, 21)
         ->getStartCommand();
 
-    expect($command)->toEqual('docker run -p 4848:22 -p 9000:21 -d --rm spatie/docker');
+    expect($command)->toEqual('docker run -p 4848:22/tcp -p 9000:21/tcp -d --rm spatie/docker');
 });
 
 it('can map string ports', function () {
@@ -65,7 +65,16 @@
         ->mapPort('0.0.0.0:9000', 21)
         ->getStartCommand();
 
-    expect($command)->toEqual('docker run -p 127.0.0.1:4848:22 -p 0.0.0.0:9000:21 -d --rm spatie/docker');
+    expect($command)->toEqual('docker run -p 127.0.0.1:4848:22/tcp -p 0.0.0.0:9000:21/tcp -d --rm spatie/docker');
+});
+
+it('can map string ports with udp set', function () {
+    $command = $this->container
+        ->mapPort('127.0.0.1:69', 69, 'udp')
+        ->mapPort('0.0.0.0:69', 69, 'udp')
+        ->getStartCommand();
+
+    expect($command)->toEqual('docker run -p 127.0.0.1:69:69/udp -p 0.0.0.0:69:69/udp -d --rm spatie/docker');
 });
 
 it('can set environment variables', function () {

tests/PortMappingTest.php

@@ -4,8 +4,14 @@
 
 use Spatie\Docker\PortMapping;
 
-it('should convert to a string correctly', function () {
+it('should convert to a string correctly with tcp protocol as default', function () {
     $portMapping = new PortMapping(8080, 80);
 
-    expect($portMapping)->toEqual('-p 8080:80');
+    expect($portMapping)->toEqual('-p 8080:80/tcp');
+});
+
+it('should convert to a string correctly with configured udp protocol', function () {
+    $portMapping = new PortMapping(8080, 80, 'udp');
+
+    expect($portMapping)->toEqual('-p 8080:80/udp');
 });