Valida concorrencia e aplica orcamento com recuperacao verificada

tests/Feature/BudgetTest.php

@@ -9,6 +9,7 @@ use App\Services\ConflictGuard;
 use App\Services\RequisitionWorkflow;
 use Illuminate\Support\Facades\DB;
 use Illuminate\Validation\ValidationException;
+use Symfony\Component\HttpKernel\Exception\HttpException;
 
 require_once __DIR__.'/../Support/ReceiptFixture.php';
 
@@ -76,6 +77,13 @@ test('company chooses its own tax basis', function () {
     expect((int) BudgetEntry::query()->sum('reserved_minor'))->toBe(10000);
 });
 
+test('approved company allocation and tax basis cannot be rewritten', function () {
+    $this->budget->update(['approved_by' => $this->approver->id]);
+    expect(fn () => $this->budget->update(['amount_minor' => 999999]))->toThrow(LogicException::class);
+    expect(fn () => $this->budget->refresh()->update(['includes_tax' => false]))->toThrow(LogicException::class);
+    expect(fn () => $this->budget->refresh()->delete())->toThrow(LogicException::class);
+});
+
 test('foreign company cannot read or approve allocation', function () {
     $other = receiptFixture();
     $user = User::factory()->create(['tenant_id' => $other['tenant']->id, 'purchasing_role' => PurchasingRole::Finance]);
@@ -103,3 +111,41 @@ test('failed audit rolls back budget reservation', function () {
     expect(fn () => budgetRecord($this, 'reserve', 10000))->toThrow(RuntimeException::class);
     expect(BudgetEntry::query()->count())->toBe(0);
 });
+
+test('submission with insufficient approved budget leaves draft and approvals unchanged', function () {
+    $this->budget->update(['approved_by' => $this->approver->id, 'amount_minor' => 9999]);
+    $request = $this->f['r'];
+    $request->update(['status' => 'draft']);
+    $this->actingAs($this->f['issuer']);
+    expect(fn () => app(RequisitionWorkflow::class)->submit($this->f['issuer'], $request))->toThrow(ValidationException::class);
+    expect($request->refresh()->status)->toBe('draft')
+        ->and($request->steps()->count())->toBe(0)
+        ->and(BudgetEntry::query()->count())->toBe(0);
+});
+
+test('submission reserves approved allocation and rejection releases it', function () {
+    $this->budget->update(['approved_by' => $this->approver->id]);
+    $request = $this->f['r'];
+    $request->update(['status' => 'draft']);
+    $this->actingAs($this->f['issuer']);
+    app(RequisitionWorkflow::class)->submit($this->f['issuer'], $request);
+    expect($request->refresh()->status)->toBe('pending')
+        ->and((int) BudgetEntry::query()->sum('reserved_minor'))->toBe(10000);
+    $head = User::factory()->create(['tenant_id' => $this->f['tenant']->id, 'department_id' => $this->f['department']->id, 'purchasing_role' => PurchasingRole::DepartmentHead]);
+    $this->actingAs($head);
+    app(RequisitionWorkflow::class)->decide($head, $request, 'rejected', 'Necessidade não confirmada.');
+    expect($request->refresh()->status)->toBe('rejected')
+        ->and((int) BudgetEntry::query()->sum('reserved_minor'))->toBe(0);
+});
+
+test('budget service refuses a requisition belonging to another company', function () {
+    $other = receiptFixture();
+    $this->actingAs($this->author);
+    try {
+        DB::transaction(fn () => app(BudgetWorkflow::class)->record($this->author, $other['r'], 'reserve', 10000));
+        $this->fail('A foreign requisition must be rejected.');
+    } catch (HttpException $exception) {
+        expect($exception->getStatusCode())->toBe(403);
+    }
+    expect(BudgetEntry::query()->count())->toBe(0);
+});