assertObjectHasProperty() and assertObjectNotHasProperty()

src/Framework/Assert.php

@@ -51,6 +51,7 @@
 use PHPUnit\Framework\Constraint\LogicalOr;
 use PHPUnit\Framework\Constraint\LogicalXor;
 use PHPUnit\Framework\Constraint\ObjectEquals;
+use PHPUnit\Framework\Constraint\ObjectHasProperty;
 use PHPUnit\Framework\Constraint\RegularExpression;
 use PHPUnit\Framework\Constraint\SameSize;
 use PHPUnit\Framework\Constraint\StringContains;
@@ -61,7 +62,6 @@
 use PHPUnit\Framework\Constraint\TraversableContainsEqual;
 use PHPUnit\Framework\Constraint\TraversableContainsIdentical;
 use PHPUnit\Framework\Constraint\TraversableContainsOnly;
-use PHPUnit\Util\Type;
 use PHPUnit\Util\Xml\Loader as XmlLoader;
 use PHPUnit\Util\Xml\XmlException;
 
@@ -934,6 +934,36 @@ final public static function assertNan(mixed $actual, string $message = ''): voi
         static::assertThat($actual, static::isNan(), $message);
     }
 
+    /**
+     * Asserts that an object has a specified property.
+     *
+     * @throws ExpectationFailedException
+     */
+    final public static function assertObjectHasProperty(string $propertyName, object $object, string $message = ''): void
+    {
+        static::assertThat(
+            $object,
+            new ObjectHasProperty($propertyName),
+            $message
+        );
+    }
+
+    /**
+     * Asserts that an object does not have a specified property.
+     *
+     * @throws ExpectationFailedException
+     */
+    final public static function assertObjectNotHasProperty(string $propertyName, object $object, string $message = ''): void
+    {
+        static::assertThat(
+            $object,
+            new LogicalNot(
+                new ObjectHasProperty($propertyName)
+            ),
+            $message
+        );
+    }
+
     /**
      * Asserts that two variables have the same type and value.
      * Used on objects, it asserts that two variables reference

src/Framework/Assert/Functions.php

@@ -1126,6 +1126,38 @@ function assertNan(mixed $actual, string $message = ''): void
     }
 }
 
+if (!function_exists('PHPUnit\Framework\assertObjectHasProperty')) {
+    /**
+     * Asserts that an object has a specified property.
+     *
+     * @throws ExpectationFailedException
+     *
+     * @no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit
+     *
+     * @see Assert::assertObjectHasProperty()
+     */
+    function assertObjectHasProperty(string $attributeName, object $objet, string $message = ''): void
+    {
+        Assert::assertObjectHasProperty(...func_get_args());
+    }
+}
+
+if (!function_exists('PHPUnit\Framework\assertObjectNotHasProperty')) {
+    /**
+     * Asserts that an object does not have a specified property.
+     *
+     * @throws ExpectationFailedException
+     *
+     * @no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit
+     *
+     * @see Assert::assertObjectNotHasProperty()
+     */
+    function assertObjectNotHasProperty(string $attributeName, object $objet, string $message = ''): void
+    {
+        Assert::assertObjectNotHasProperty(...func_get_args());
+    }
+}
+
 if (!function_exists('PHPUnit\Framework\assertSame')) {
     /**
      * Asserts that two variables have the same type and value.

src/Framework/Constraint/Object/ObjectHasProperty.php

@@ -0,0 +1,76 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of PHPUnit.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace PHPUnit\Framework\Constraint;
+
+use function is_object;
+use function sprintf;
+use ReflectionException;
+use ReflectionObject;
+
+/**
+ * @no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit
+ */
+final class ObjectHasProperty extends Constraint
+{
+    private readonly string $propertyName;
+
+    public function __construct(string $propertyName)
+    {
+        $this->propertyName = $propertyName;
+    }
+
+    /**
+     * Returns a string representation of the constraint.
+     */
+    public function toString(): string
+    {
+        return sprintf(
+            'has property "%s"',
+            $this->propertyName
+        );
+    }
+
+    /**
+     * Evaluates the constraint for parameter $other. Returns true if the
+     * constraint is met, false otherwise.
+     *
+     * @param mixed $other value or object to evaluate
+     */
+    protected function matches(mixed $other): bool
+    {
+        if (!is_object($other)) {
+            return false;
+        }
+
+        try {
+            return (new ReflectionObject($other))->hasProperty($this->propertyName);
+        } catch (ReflectionException) {
+            return false;
+        }
+    }
+
+    /**
+     * Returns the description of the failure.
+     *
+     * The beginning of failure messages is "Failed asserting that" in most
+     * cases. This method should return the second part of that sentence.
+     *
+     * @param mixed $other evaluated value or object
+     */
+    protected function failureDescription(mixed $other): string
+    {
+        return sprintf(
+            '%sclass "%s" %s',
+            is_object($other) ? 'object of ' : '',
+            is_object($other) ? $other::class : $other,
+            $this->toString()
+        );
+    }
+}

tests/unit/Framework/Constraint/ObjectHasPropertyTest.php

@@ -0,0 +1,70 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of PHPUnit.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace PHPUnit\Framework\Constraint;
+
+use PHPUnit\Framework\ExpectationFailedException;
+use PHPUnit\TestFixture\ClassWithNonPublicAttributes;
+use stdClass;
+
+/**
+ * @small
+ */
+final class ObjectHasPropertyTest extends ConstraintTestCase
+{
+    public function testConstraintObjectHasAttribute(): void
+    {
+        $constraint = new ObjectHasProperty('privateAttribute');
+
+        $this->assertTrue($constraint->evaluate(new ClassWithNonPublicAttributes, '', true));
+        $this->assertFalse($constraint->evaluate(new stdClass, '', true));
+        $this->assertEquals('has property "privateAttribute"', $constraint->toString());
+        $this->assertCount(1, $constraint);
+
+        $this->expectException(ExpectationFailedException::class);
+        $this->expectExceptionMessage(
+            <<<'EOF'
+            Failed asserting that object of class "stdClass" has property "privateAttribute".
+            EOF
+        );
+        $constraint->evaluate(new stdClass);
+    }
+
+    public function testAssertObjectHasAttribute(): void
+    {
+        $this->assertObjectNotHasProperty('privateAttribute', new stdClass);
+        $this->assertObjectHasProperty('foo', new ClassWithNonPublicAttributes);
+    }
+
+    public function testConstraintObjectHasAttribute2(): void
+    {
+        $constraint = new ObjectHasProperty('privateAttribute');
+
+        $this->expectException(ExpectationFailedException::class);
+        $this->expectExceptionMessage(
+            <<<EOF
+            custom message\nFailed asserting that object of class "stdClass" has property "privateAttribute".
+            EOF
+        );
+        $constraint->evaluate(new stdClass, 'custom message');
+    }
+
+    public function testConstraintObjectHasAttributeWithNoObject(): void
+    {
+        $constraint = new ObjectHasProperty('privateAttribute');
+
+        $this->expectException(ExpectationFailedException::class);
+        $this->expectExceptionMessage(
+            <<<EOF
+            custom message\nFailed asserting that class "" has property "privateAttribute".
+            EOF
+        );
+        $constraint->evaluate('', 'custom message');
+    }
+}