feat: collect assignment and disposition events for statistics

tests/Form/AssignmentTypeTest.php

@@ -0,0 +1,73 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Form;
+
+use App\Entity\Assignment;
+use App\Form\AssignmentType;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Calling off an assignment has to go through the dedicated action, because that is the
+ * only path that also cancels the dispositions on it. Offering "abgesagt" in this form left
+ * teamers holding a live placement on a trip that had been cancelled - 23 assignments in the
+ * database are in exactly that state.
+ *
+ * The choice list is asserted directly rather than through a built form: the form also
+ * carries EntityType fields that query the database, and this suite does not have one.
+ * ChoiceType validates submissions against exactly this list, so it is the enforcement
+ * point, not merely what gets rendered.
+ */
+class AssignmentTypeTest extends TestCase
+{
+    public function testADraftCannotBeCalledOffThroughTheStatusField(): void
+    {
+        $this->assertSame(
+            [Assignment::STATUS_DRAFT, Assignment::STATUS_PUBLISHED],
+            $this->statusChoices(Assignment::STATUS_DRAFT)
+        );
+    }
+
+    /**
+     * The published case is the one that mattered: a staffed trip cancelled from the edit
+     * form kept every disposition on it alive.
+     */
+    public function testAPublishedAssignmentCannotBeCalledOffEither(): void
+    {
+        $this->assertNotContains(Assignment::STATUS_CALLED_OFF, $this->statusChoices(Assignment::STATUS_PUBLISHED));
+    }
+
+    /**
+     * Otherwise opening its edit form would render an empty status, and saving anything
+     * else on the page would silently resurrect the assignment.
+     */
+    public function testAnAlreadyCalledOffAssignmentKeepsTheValue(): void
+    {
+        $this->assertContains(Assignment::STATUS_CALLED_OFF, $this->statusChoices(Assignment::STATUS_CALLED_OFF));
+    }
+
+    /**
+     * There is no dedicated undo for a call-off, so this form stays the way back.
+     */
+    public function testACalledOffAssignmentCanStillBeRestored(): void
+    {
+        $this->assertContains(Assignment::STATUS_PUBLISHED, $this->statusChoices(Assignment::STATUS_CALLED_OFF));
+    }
+
+    /**
+     * A brand new assignment has no entity behind the form yet.
+     */
+    public function testTheChoicesHoldWithoutAnAssignment(): void
+    {
+        $this->assertNotContains(Assignment::STATUS_CALLED_OFF, array_values(AssignmentType::statusChoices(null)));
+    }
+
+    /**
+     * @return array<int, string>
+     */
+    private function statusChoices(string $status): array
+    {
+        return array_values(AssignmentType::statusChoices((new Assignment())->setStatus($status)));
+    }
+}