Improve wp acorn compability

tests/Acorn/BootCoordinatorTest.php

@@ -0,0 +1,50 @@
+<?php
+
+declare(strict_types=1);
+
+namespace AcornPlugin\Tests\Acorn;
+
+use AcornPlugin\Acorn\BootCoordinator;
+use AcornPlugin\Tests\TestCase;
+use Brain\Monkey\Functions;
+
+final class BootCoordinatorTest extends TestCase
+{
+    // -----------------------------------------------------------------------
+    // shouldBoot()
+    // -----------------------------------------------------------------------
+
+    public function test_should_boot_returns_true_when_action_has_not_fired(): void
+    {
+        Functions\when('did_action')->justReturn(0);
+
+        $result = (new BootCoordinator())->shouldBoot();
+
+        $this->assertTrue($result);
+    }
+
+    public function test_should_boot_returns_false_when_action_already_fired(): void
+    {
+        Functions\expect('did_action')
+            ->once()
+            ->with(BootCoordinator::BOOTED_ACTION)
+            ->andReturn(1);
+
+        $result = (new BootCoordinator())->shouldBoot();
+
+        $this->assertFalse($result);
+    }
+
+    // -----------------------------------------------------------------------
+    // markBooted()
+    // -----------------------------------------------------------------------
+
+    public function test_mark_booted_fires_the_booted_action_once(): void
+    {
+        Functions\expect('do_action')
+            ->once()
+            ->with(BootCoordinator::BOOTED_ACTION);
+
+        (new BootCoordinator())->markBooted();
+    }
+}

tests/TestCase.php

@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace AcornPlugin\Tests;
+
+use Brain\Monkey;
+use Mockery\Adapter\Phpunit\MockeryPHPUnitIntegration;
+use PHPUnit\Framework\TestCase as PhpUnitTestCase;
+
+abstract class TestCase extends PhpUnitTestCase
+{
+    // Bridges Brain\Monkey's Mockery-backed expectations into PHPUnit's
+    // assertion count, so expectation-only tests aren't reported as "risky".
+    use MockeryPHPUnitIntegration;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        Monkey\setUp();
+    }
+
+    protected function tearDown(): void
+    {
+        Monkey\tearDown();
+        parent::tearDown();
+    }
+}

tests/bootstrap.php

@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * WordPress isn't loaded in unit tests. Define ABSPATH as insurance so any code
+ * that transitively pulls in a file guarded by `defined('ABSPATH') || exit;`
+ * fails loudly instead of vanishing mid-load. BootCoordinator itself needs no WP
+ * constants — Brain\Monkey mocks did_action()/do_action() per test.
+ */
+if (! defined('ABSPATH')) {
+    define('ABSPATH', __DIR__ . '/');
+}
+
+require_once __DIR__ . '/../vendor/autoload.php';