add test suite for DrawsTabs trait

tests/Feature/DrawsTabsTest.php

@@ -0,0 +1,99 @@
+<?php
+
+use Illuminate\Support\Collection;
+use Laravel\Prompts\Prompt;
+use Laravel\Prompts\Themes\Default\Concerns\DrawsTabs;
+use Laravel\Prompts\Themes\Default\Renderer;
+
+class TestPrompt extends Prompt
+{
+    public function __construct(
+        public Collection $tabs,
+        public int $selected = 0,
+        public int $width = 60,
+    ) {
+        static::$themes['default'][static::class] = TestRenderer::class;
+    }
+
+    public function value(): mixed
+    {
+        return null;
+    }
+
+    public function display(): void
+    {
+        static::output()->write($this->renderTheme());
+    }
+}
+
+class TestRenderer extends Renderer
+{
+    use DrawsTabs;
+
+    public function __invoke(TestPrompt $prompt)
+    {
+        return $this->tabs($prompt->tabs, $prompt->selected, $prompt->width);
+    }
+}
+
+/**
+ * Note: Trailing whitespace is intentional in order to match the output.
+ * Removing it will cause the test to fail (correctly) while allowing
+ * the output to appear indistinguishable from the expected output.
+ */
+
+it('renders tabs', function () {
+    Prompt::fake();
+
+    $tabs = collect(['One', 'Two', 'Three', 'Four', 'Five', 'Six']);
+
+    (new TestPrompt($tabs))->display();
+
+    Prompt::assertStrippedOutputContains(<<<'OUTPUT'
+    ╭─────╮                                       
+    │ One │  Two    Three    Four    Five    Six  
+    ┴─────┴─────────────────────────────────────────────────────
+    OUTPUT);
+});
+
+it('highlights tabs', function () {
+    Prompt::fake();
+
+    $tabs = collect(['One', 'Two', 'Three', 'Four', 'Five', 'Six']);
+
+    (new TestPrompt($tabs, 2))->display();
+
+    Prompt::assertStrippedOutputContains(<<<'OUTPUT'
+                  ╭───────╮                       
+      One    Two  │ Three │  Four    Five    Six  
+    ──────────────┴───────┴─────────────────────────────────────
+    OUTPUT);
+});
+
+it('truncates tabs', function () {
+    Prompt::fake();
+
+    $tabs = collect(['One', 'Two', 'Three', 'Four', 'Five', 'Six', 'Seven', 'Eight']);
+
+    (new TestPrompt($tabs))->display();
+
+    Prompt::assertStrippedOutputContains(<<<'OUTPUT'
+    ╭─────╮                                                     
+    │ One │  Two    Three    Four    Five    Six    Seven    Eig
+    ┴─────┴─────────────────────────────────────────────────────
+    OUTPUT);
+});
+
+it('scrolls tabs', function () {
+    Prompt::fake();
+
+    $tabs = collect(['One', 'Two', 'Three', 'Four', 'Five', 'Six', 'Seven', 'Eight']);
+
+    (new TestPrompt($tabs, 7))->display();
+
+    Prompt::assertStrippedOutputContains(<<<'OUTPUT'
+                                                       ╭───────╮
+    e    Two    Three    Four    Five    Six    Seven  │ Eight │
+    ───────────────────────────────────────────────────┴───────┴
+    OUTPUT);
+});