Add simple initMethod test

tests/Acceptance/Extra/Workflow/InitMethodTest.php

@@ -0,0 +1,54 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Temporal\Tests\Acceptance\Extra\Workflow\InitMethod;
+
+use PHPUnit\Framework\Attributes\CoversFunction;
+use PHPUnit\Framework\Attributes\Test;
+use Temporal\Client\WorkflowStubInterface;
+use Temporal\Tests\Acceptance\App\Attribute\Stub;
+use Temporal\Tests\Acceptance\App\TestCase;
+use Temporal\Workflow;
+use Temporal\Workflow\InitMethod;
+use Temporal\Workflow\WorkflowInterface;
+use Temporal\Workflow\WorkflowMethod;
+
+#[CoversFunction('Temporal\Internal\Workflow\Process\Process::logRunningHandlers')]
+class InitMethodTest extends TestCase
+{
+    #[Test]
+    public function updateHandlersWithOneCall(
+        #[Stub(
+            type: 'Extra_Workflow_InitMethod',
+            args: [new Input('John Doe', 30)],
+        )] WorkflowStubInterface $stub,
+    ): void {
+        $this->assertTrue($stub->getResult(timeout: 5));
+    }
+}
+
+#[WorkflowInterface]
+class TestWorkflow
+{
+    private array $initInput;
+
+    #[InitMethod]
+    public function __construct(Input $input) {
+        $this->initInput = \func_get_args();
+    }
+
+    #[WorkflowMethod(name: "Extra_Workflow_InitMethod")]
+    public function handle(Input $input)
+    {
+        return $this->initInput === \func_get_args();
+    }
+}
+
+class Input
+{
+    public function __construct(
+        public string $name,
+        public int $age,
+    ) {}
+}