[bug] fix debugging source when exception is detected (#88)

Author: kbond

src/Browser/Session.php

@@ -103,7 +103,7 @@ public function source(): string
         try {
             $ret .= $this->json();
         } catch (DriverException $e) {
-            $ret .= $this->page()->getContent();
+            $ret .= \trim($this->getDriver()->getContent());
         }
 
         return $ret;

tests/KernelBrowserTests.php

@@ -506,6 +506,22 @@ public function can_save_formatted_json_source(): void
         $this->assertStringContainsString('    "content": null,', $contents);
     }
 
+    /**
+     * @test
+     */
+    public function can_save_source_when_exception(): void
+    {
+        $contents = self::catchFileContents(__DIR__.'/../var/browser/source/source.txt', function() {
+            $this->browser()
+                ->visit('/invalid-page')
+                ->assertStatus(404)
+                ->saveSource('/source.txt')
+            ;
+        });
+
+        $this->assertStringContainsString('No route found for', $contents);
+    }
+
     /**
      * @test
      */