chore(PHP): add feature signal\signal_with_start

features/signal/signal_with_start/feature.php

@@ -0,0 +1,49 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Harness\Feature\Signal\SignalWithStart;
+
+use Harness\Attribute\Check;
+use Harness\Runtime\Feature;
+use Temporal\Client\WorkflowClientInterface;
+use Temporal\Client\WorkflowOptions;
+use Temporal\Workflow\SignalMethod;
+use Temporal\Workflow\WorkflowInterface;
+use Temporal\Workflow\WorkflowMethod;
+use Webmozart\Assert\Assert;
+
+#[WorkflowInterface]
+class FeatureWorkflow
+{
+    private int $value = 0;
+
+    #[WorkflowMethod('Workflow')]
+    public function run(): int
+    {
+        return $this->value;
+    }
+
+    #[SignalMethod('add')]
+    public function add(int $arg): void
+    {
+        $this->value += $arg;
+    }
+}
+
+class FeatureChecker
+{
+    #[Check]
+    public static function check(
+        WorkflowClientInterface $client,
+        Feature $feature,
+    ): void {
+        $stub = $client->newWorkflowStub(
+            FeatureWorkflow::class,
+            WorkflowOptions::new()->withTaskQueue($feature->taskQueue),
+        );
+        $run = $client->startWithSignal($stub, 'add', [42]);
+        // See https://github.com/temporalio/sdk-php/issues/457
+        Assert::same($run->getResult(), 42, 'Signal must be executed before Workflow handler');
+    }
+}