feat: empty input fields assertions

src/Dom/Assertion.php

@@ -161,7 +161,7 @@ public function fieldEquals(Selector|string|callable $selector, string $expected
     {
         $field = $this->field($selector);
 
-        if ($expected === $field->value()) {
+        if ($expected === (string) $field->value()) {
             Assert::pass();
 
             return $this;

tests/AssertionTest.php

@@ -125,6 +125,12 @@ public function field_equals_for_input(): void
         $this->assertion()->fieldEquals('#input1', 'input 1');
     }
 
+    #[Test]
+    public function field_equals_for_empty_string(): void
+    {
+        $this->assertion()->fieldEquals('#empty-input', '');
+    }
+
     #[Test]
     public function field_equals_for_combobox_by_text(): void
     {
@@ -149,6 +155,12 @@ public function field_selected_for_combobox(): void
         $this->assertion()->fieldSelected('#input4', 'option 1');
     }
 
+    #[Test]
+    public function field_placeholder_selected_for_combobox(): void
+    {
+        $this->assertion()->fieldSelected('#select-with-empty-value', '');
+    }
+
     #[Test]
     public function field_selected_for_multiselect_by_value(): void
     {

tests/Fixtures/page.html

@@ -66,6 +66,16 @@ <h1>h1 title</h1>
     <label for="title">Title</label>
     <input type="text" id="title" name="title" value="initial title">
 
+    <label for="empty-input">Empty Input</label>
+    <input type="text" id="empty-input" name="empty_input" value="">
+
+    <label for="select-with-empty-value">Select with empty value</label>
+    <select id="select-with-empty-value" name="select_with_empty_value">
+        <option value=""></option>
+        <option value="1"></option>
+        <option value="2"></option>
+    </select>
+
     <label for="input10">Input 10</label>
     <select id="input10" name="input_10">
         <option>option 1</option>