feat: update page function to accept null URL and navigate conditionally

Author: MrPunyapal

src/Autoload.php

@@ -30,14 +30,17 @@ function visit(string $url): PendingTest
     /**
      * Visits the given URL, and starts a new browser test.
      */
-    function page(string $url = '/'): Page
+    function page(?string $url = null): Page
     {
         Server::instance()->start();
         Client::instance()->connectTo(Server::instance()->url('?browser=chromium'));
 
         $browser = Playwright::chromium()->launch();
         $page = $browser->newPage();
-        $page->goto($url);
+
+        if ($url !== null) {
+            $page->goto($url);
+        }
 
         return $page;
     }

src/Browser.php

@@ -22,7 +22,7 @@ public function visit(string $url): PendingTest
     /**
      * gets the page instance for given URL.
      */
-    public function page(string $url): Page
+    public function page(?string $url = null): Page
     {
         return page($url);
     }

tests/Browser/Operations/AssertCheckedTest.php

@@ -6,25 +6,25 @@
 
 describe('assertChecked', function (): void {
     it('passes when checkbox is checked', function (): void {
-        $page = $this->page(playgroundUrl('/test/form-inputs'));
+        $page = $this->page()->goto(playgroundUrl('/test/form-inputs'));
 
         expect($page->querySelector('input[name="checked-checkbox"]'))->toBeChecked();
     });
 
     it('fails when checkbox is checked', function (): void {
-        $page = $this->page(playgroundUrl('/test/form-inputs'));
+        $page = $this->page()->goto(playgroundUrl('/test/form-inputs'));
 
         expect($page->querySelector('input[name="checked-checkbox"]'))->not->toBeChecked();
     })->throws(ExpectationFailedException::class);
 
     it('passes when checkbox is not checked', function (): void {
-        $page = $this->page(playgroundUrl('/test/form-inputs'));
+        $page = $this->page()->goto(playgroundUrl('/test/form-inputs'));
 
         expect($page->querySelector('input[name="unchecked-checkbox"]'))->not->toBeChecked();
     });
 
     it('fails when checkbox is not checked', function (): void {
-        $page = $this->page(playgroundUrl('/test/form-inputs'));
+        $page = $this->page()->goto(playgroundUrl('/test/form-inputs'));
 
         expect($page->querySelector('input[name="unchecked-checkbox"]'))->toBeChecked();
     })->throws(ExpectationFailedException::class);