Fix psalm

.gitignore

@@ -1,3 +1,4 @@
 vendor/
 .idea/
 composer.lock
+infection.log

.travis.yml

@@ -15,7 +15,7 @@ jobs:
         - composer global require infection/infection
       script:
         - composer psalm
-        - ~/.config/composer/vendor/bin/infection --min-msi=90
+        - ~/.config/composer/vendor/bin/infection -s --min-msi=90
 
 install:
   - travis_retry composer install

src/FilterChildBuilder.php

@@ -119,6 +119,16 @@ public function depends(string ...$inputNames)
         return $this;
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function childFactory($factory)
+    {
+        $this->builder->childFactory($factory);
+
+        return $this;
+    }
+
     /**
      * {@inheritdoc}
      */

src/FilterFormBuilder.php

@@ -99,7 +99,7 @@ public function add(string $name, string $element): ChildBuilderInterface
      * @return FilterChildBuilder|StringElementBuilder
      * @psalm-return FilterChildBuilder<StringElementBuilder>
      */
-    public function string(string $name, $default = null): ChildBuilderInterface
+    public function string(string $name, ?string $default = null): ChildBuilderInterface
     {
         return new FilterChildBuilder($this->inner->string($name, $default));
     }
@@ -110,7 +110,7 @@ public function string(string $name, $default = null): ChildBuilderInterface
      * @return FilterChildBuilder|IntegerElementBuilder
      * @psalm-return FilterChildBuilder<IntegerElementBuilder>
      */
-    public function integer(string $name, $default = null): ChildBuilderInterface
+    public function integer(string $name, ?int $default = null): ChildBuilderInterface
     {
         return new FilterChildBuilder($this->inner->integer($name, $default));
     }
@@ -121,7 +121,7 @@ public function integer(string $name, $default = null): ChildBuilderInterface
      * @return FilterChildBuilder|FloatElementBuilder
      * @psalm-return FilterChildBuilder<FloatElementBuilder>
      */
-    public function float(string $name, $default = null): ChildBuilderInterface
+    public function float(string $name, ?float $default = null): ChildBuilderInterface
     {
         return new FilterChildBuilder($this->inner->float($name, $default));
     }

tests/FilterChildBuilderTest.php

@@ -49,6 +49,9 @@ public function test_delegated_methods()
         $inner->expects($this->once())->method('depends')->with('foo', 'bar');
         $this->assertSame($builder, $builder->depends('foo', 'bar'));
 
+        $inner->expects($this->once())->method('childFactory')->with(function() {});
+        $this->assertSame($builder, $builder->childFactory(function() {}));
+
         $child = $this->builder->length(['min' => 3])->buildChild()->setParent(new Form(new ChildrenCollection()));
         $this->assertFalse($child->element()->submit('a')->valid());
         $this->assertTrue($child->element()->submit('aaa')->valid());