wip

tests-tia/AffectedSetTest.php

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+<?php
+
+declare(strict_types=1);
+
+use Pest\TestsTia\Support\Sandbox;
+
+/*
+ * Mutating a source file should narrow replay to the tests that depend
+ * on it. Untouched areas of the suite keep cache-hitting.
+ */
+
+test('editing a source file marks only its dependents as affected', function () {
+    tiaScenario(function (Sandbox $sandbox) {
+        $sandbox->pest(['--tia']);
+
+        $sandbox->write('src/Math.php', <<<'PHP'
+<?php
+
+declare(strict_types=1);
+
+namespace App;
+
+final class Math
+{
+    public static function add(int $a, int $b): int
+    {
+        return $a + $b;
+    }
+
+    public static function sub(int $a, int $b): int
+    {
+        return $a - $b;
+    }
+}
+PHP);
+
+        $process = $sandbox->pest(['--tia']);
+
+        expect($process->isSuccessful())->toBeTrue(tiaOutput($process));
+        expect(tiaOutput($process))->toMatch('/2 affected,\s*1 replayed/');
+    });
+});
+
+test('adding a new test file runs the new test + replays the rest', function () {
+    tiaScenario(function (Sandbox $sandbox) {
+        $sandbox->pest(['--tia']);
+
+        $sandbox->write('tests/ExtraTest.php', <<<'PHP'
+<?php
+
+declare(strict_types=1);
+
+test('extra smoke', function () {
+    expect(true)->toBeTrue();
+});
+PHP);
+
+        $process = $sandbox->pest(['--tia']);
+
+        expect($process->isSuccessful())->toBeTrue(tiaOutput($process));
+        expect(tiaOutput($process))->toMatch('/1 affected,\s*3 replayed/');
+    });
+});