fix: tia

tests/Unit/Plugins/Tia/Graph.php

@@ -0,0 +1,37 @@
+<?php
+
+declare(strict_types=1);
+
+use Pest\Plugins\Tia\Graph;
+
+describe('markKnownTestFiles()', function (): void {
+    it('makes a test file with no edges known', function (): void {
+        $graph = new Graph(sys_get_temp_dir());
+
+        expect($graph->knowsTest('tests/Unit/ExampleTest.php'))->toBeFalse();
+
+        $graph->markKnownTestFiles(['tests/Unit/ExampleTest.php']);
+
+        expect($graph->knowsTest('tests/Unit/ExampleTest.php'))->toBeTrue();
+    });
+
+    it('does not clobber edges of an already-known test file', function (): void {
+        $graph = new Graph(sys_get_temp_dir());
+        $graph->link('tests/Feature/UserTest.php', 'app/Models/User.php');
+
+        $graph->markKnownTestFiles(['tests/Feature/UserTest.php']);
+
+        // The pre-existing edge survives — the test still depends on the source file.
+        $affected = $graph->affected(['app/Models/User.php']);
+
+        expect($affected)->toContain('tests/Feature/UserTest.php');
+    });
+
+    it('ignores paths outside the project root', function (): void {
+        $graph = new Graph(sys_get_temp_dir());
+
+        $graph->markKnownTestFiles(['/somewhere/else/tests/FooTest.php']);
+
+        expect($graph->knowsTest('/somewhere/else/tests/FooTest.php'))->toBeFalse();
+    });
+});