add transforms test

src/Predicates/objects.php

@@ -12,6 +12,8 @@ namespace Kadet\Functional\Predicates;
 
 use function Kadet\Functional\predicate;
 use Kadet\Functional\Predicate\ClosurePredicate;
+use Kadet\Functional\Transforms as t;
+use Kadet\Functional as f;
 
 /**
  * @param string $method
@@ -22,11 +24,7 @@ use Kadet\Functional\Predicate\ClosurePredicate;
  */
 function method(string $method, $predicate, ...$args)
 {
-    $predicate = predicate($predicate);
-
-    return new ClosurePredicate(function ($object) use ($method, $predicate, $args) {
-        return $predicate($object->{$method}($args));
-    });
+    return predicate(f\pipe(t\method($method, ...$args), $predicate));
 }
 
 /**
@@ -35,18 +33,20 @@ function method(string $method, $predicate, ...$args)
  *
  * @return \Kadet\Functional\Predicate
  */
-function property(string $property, $predicate) {
-    $predicate = predicate($predicate);
+function property(string $property, $predicate)
+{
+    return predicate(f\pipe(t\property($property), $predicate));
+}
 
-    return new ClosurePredicate(function ($object) use ($property, $predicate) {
-        if (isset($object->$property)) {
-            return $predicate($object->$property);
-        } elseif (method_exists($object, $getter = 'get'.ucfirst($property))) {
-            return $predicate($object->$getter());
-        } else {
-            return false;
-        }
-    });
+/**
+ * @param string $field
+ * @param        $predicate
+ *
+ * @return \Kadet\Functional\Predicate
+ */
+function field(string $field, $predicate)
+{
+    return predicate(f\pipe(t\field($field), $predicate));
 }
 
 function instance(string $class)

tests/ObjectTransformsTest.php

@@ -0,0 +1,118 @@
+<?php
+/**
+ * Copyright 2019 Kacper Donat
+ *
+ * @author Kacper "Kadet" Donat <kacper@kadet.net>
+ *
+ * Full license available in separate LICENSE file
+ */
+
+class PropertiesObject {
+    private $getter;
+    private $magic = [];
+    public  $field = 'value';
+
+    public function __construct($field, $getter, array $magic = [])
+    {
+        $this->field  = $field;
+        $this->getter = $getter;
+        $this->magic  = $magic;
+    }
+
+    public function getValue()
+    {
+        return $this->getter;
+    }
+
+    public function __get($name)
+    {
+        return $this->magic[$name];
+    }
+
+    public function __toString()
+    {
+        return __CLASS__;
+    }
+}
+
+class ObjectTransformsTest extends \PHPUnit\Framework\TestCase
+{
+    use RandomDataTrait;
+
+    /**
+     * @dataProvider randomDataProvider
+     */
+    public function testFieldTransform($data = null)
+    {
+        $object = new PropertiesObject($data, null, []);
+        $transform = \Kadet\Functional\Transforms\field('field');
+
+        $this->assertSame($transform($object), $data);
+    }
+
+    /**
+     * @dataProvider randomDataProvider
+     */
+    public function testFieldTransformMagic($data = null)
+    {
+        $object = new PropertiesObject(false, false, ['magic' => $data]);
+        $transform = \Kadet\Functional\Transforms\property('magic');
+
+        $this->assertSame($transform($object), $data);
+    }
+
+    /**
+     * @dataProvider randomDataProvider
+     */
+    public function testPropertyTransformGetter($data = null)
+    {
+        $object = new PropertiesObject(false, $data, []);
+        $transform = \Kadet\Functional\Transforms\property('value');
+
+        $this->assertSame($transform($object), $data);
+    }
+
+    /**
+     * @dataProvider randomDataProvider
+     */
+    public function testGetterTransform($data = null)
+    {
+        $object = new PropertiesObject(false, $data, []);
+        $transform = \Kadet\Functional\Transforms\getter('value');
+
+        $this->assertSame($transform($object), $data);
+    }
+
+    /**
+     * @dataProvider randomDataProvider
+     */
+    public function testPropertyTransformField($data = null)
+    {
+        $object = new PropertiesObject($data, false, []);
+        $transform = \Kadet\Functional\Transforms\property('field');
+
+        $this->assertSame($transform($object), $data);
+    }
+
+    /**
+     * @dataProvider randomDataProvider
+     */
+    public function testPropertyTransformMagic($data = null)
+    {
+        $object = new PropertiesObject(false, false, ['magic' => $data]);
+        $transform = \Kadet\Functional\Transforms\property('magic');
+
+        $this->assertSame($transform($object), $data);
+    }
+
+    /**
+     * @dataProvider randomDataProvider
+     */
+    public function testMethodTransform($data = null)
+    {
+        $object = new PropertiesObject(false, false);
+        $transform = \Kadet\Functional\Transforms\method('__toString');
+
+        $this->assertSame($transform($object), PropertiesObject::class);
+    }
+}