Add descriptive error messages to assertViewHas() (#55392)

* Add descriptive error messages to assertViewHas()

* Fix inconsistency and add missing dot

* Add message to key-value case, move $actual for reuse, adjust messages.

* formatting

---------

Co-authored-by: Taylor Otwell <[email protected]>

Author: 3Descape

src/Illuminate/Testing/TestResponse.php

@@ -1192,21 +1192,21 @@ public function assertViewHas($key, $value = null)
 
         $this->ensureResponseHasView();
 
+        $actual = Arr::get($this->original->gatherData(), $key);
+
         if (is_null($value)) {
-            PHPUnit::withResponse($this)->assertTrue(Arr::has($this->original->gatherData(), $key));
+            PHPUnit::withResponse($this)->assertTrue(Arr::has($this->original->gatherData(), $key), "Failed asserting that the data contains the key [{$key}].");
         } elseif ($value instanceof Closure) {
-            PHPUnit::withResponse($this)->assertTrue($value(Arr::get($this->original->gatherData(), $key)));
+            PHPUnit::withResponse($this)->assertTrue($value($actual), "Failed asserting that the value at [{$key}] fulfills the expectations defined by the closure.");
         } elseif ($value instanceof Model) {
-            PHPUnit::withResponse($this)->assertTrue($value->is(Arr::get($this->original->gatherData(), $key)));
+            PHPUnit::withResponse($this)->assertTrue($value->is($actual), "Failed asserting that the model at [{$key}] matches the given model.");
         } elseif ($value instanceof EloquentCollection) {
-            $actual = Arr::get($this->original->gatherData(), $key);
-
             PHPUnit::withResponse($this)->assertInstanceOf(EloquentCollection::class, $actual);
             PHPUnit::withResponse($this)->assertSameSize($value, $actual);
 
-            $value->each(fn ($item, $index) => PHPUnit::withResponse($this)->assertTrue($actual->get($index)->is($item)));
+            $value->each(fn ($item, $index) => PHPUnit::withResponse($this)->assertTrue($actual->get($index)->is($item), "Failed asserting that the collection at [{$key}.[{$index}]]' matches the given collection."));
         } else {
-            PHPUnit::withResponse($this)->assertEquals($value, Arr::get($this->original->gatherData(), $key));
+            PHPUnit::withResponse($this)->assertEquals($value, $actual, "Failed asserting that [{$key}] matches the expected value.");
         }
 
         return $this;