Added AssertableInertia::partial() test helper

Author: pascalbaljet

src/Testing/AssertableInertia.php

@@ -2,6 +2,8 @@
 
 namespace Inertia\Testing;
 
+use Closure;
+use Illuminate\Foundation\Application;
 use Illuminate\Testing\Fluent\AssertableJson;
 use Illuminate\Testing\TestResponse;
 use InvalidArgumentException;
@@ -81,6 +83,29 @@ public function version(string $value): self
         return $this;
     }
 
+    public function partial(array|string $key, ?Closure $callback = null, ?Application $app = null): self
+    {
+        $partialRequest = new PartialRequest(
+            is_array($key) ? implode(',', $key) : $key,
+            $this->url,
+            $this->component,
+            $this->version,
+            $app ?? app()
+        );
+
+        $assertable = static::fromTestResponse($partialRequest());
+        $assertable->component($this->component);
+        $assertable->url($this->url);
+        $assertable->version($this->version);
+        $assertable->hasAll(is_array($key) ? $key : explode(',', $key));
+
+        if ($callback) {
+            $callback($assertable);
+        }
+
+        return $this;
+    }
+
     public function toArray()
     {
         return [

src/Testing/PartialRequest.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace Inertia\Testing;
+
+use Illuminate\Foundation\Application;
+use Illuminate\Foundation\Testing\Concerns\MakesHttpRequests;
+use Illuminate\Testing\TestResponse;
+
+class PartialRequest
+{
+    use MakesHttpRequests;
+
+    public function __construct(
+        protected string $props,
+        protected string $url,
+        protected string $component,
+        protected string $version,
+        protected Application $app
+    ) {
+    }
+
+    public function __invoke(): TestResponse
+    {
+        return $this->get($this->url, [
+            'X-Inertia-Partial-Data' => $this->props,
+            'X-Inertia-Partial-Component' => $this->component,
+            'X-Inertia-Version' => $this->version,
+        ]);
+    }
+}

tests/Testing/AssertableInertiaTest.php

@@ -193,4 +193,24 @@ public function test_the_asset_version_does_not_match(): void
             $inertia->version('different-version');
         });
     }
+
+    public function test_lazy_props_can_be_evaluated(): void
+    {
+        $response = $this->makeMockRequest(
+            Inertia::render('foo', [
+                'foo' => 'bar',
+                'lazy' => Inertia::lazy(fn () => 'baz'),
+            ])
+        );
+
+        $response->assertInertia(function ($inertia) {
+            $inertia->where('foo', 'bar');
+            $inertia->missing('lazy');
+
+            $inertia->partial('lazy', function ($inertia) {
+                $inertia->where('lazy', 'baz');
+                $inertia->missing('foo');
+            });
+        });
+    }
 }