diff --git a/src/PositiveOverNegativeCountTrait.php b/src/PositiveOverNegativeCountTrait.php
new file mode 100644
index 0000000..848e1b2
--- /dev/null
+++ b/src/PositiveOverNegativeCountTrait.php
@@ -0,0 +1,21 @@
+<?php
+
+/*
+ * This file is part of PHPUnit Good Practices.
+ *
+ * (c) Dariusz Rumiński <dariusz.ruminski@gmail.com>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+namespace PHPUnitGoodPractices;
+
+trait PositiveOverNegativeCountTrait
+{
+    // TODO:
+    //    public static function assertCount($expectedCount, $haystack, $message = '')
+    //    public static function assertAttributeCount($expectedCount, $haystackAttributeName, $haystackClassOrObject, $message = '')
+    //    public static function assertNotCount($expectedCount, $haystack, $message = '')
+    //    public static function assertAttributeNotCount($expectedCount, $haystackAttributeName, $haystackClassOrObject, $message = '')
+}
diff --git a/tests/PositiveOverNegativeCountTraitTest.php b/tests/PositiveOverNegativeCountTraitTest.php
new file mode 100644
index 0000000..aefbf18
--- /dev/null
+++ b/tests/PositiveOverNegativeCountTraitTest.php
@@ -0,0 +1,136 @@
+<?php
+
+/*
+ * This file is part of PHPUnit Good Practices.
+ *
+ * (c) Dariusz Rumiński <dariusz.ruminski@gmail.com>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+namespace PHPUnitGoodPractices\Tests;
+
+use PHPUnit\Framework\Error\Warning;
+use PHPUnit\Framework\TestCase;
+use PHPUnitGoodPractices\PositiveOverNegativeCountTrait;
+
+/**
+ * @covers \PHPUnitGoodPractices\PositiveOverNegativeCountTrait
+ */
+final class PositiveOverNegativeCountTraitTest extends TestCase
+{
+    use PositiveOverNegativeCountTrait;
+
+    public $fixtureAttributePositive = array(11);
+    public $fixtureAttributeZero = array();
+
+    public function expectException($exception)
+    {
+        if (is_callable(array('parent', 'expectException'))) {
+            parent::expectException($exception);
+        } else {
+            $this->setExpectedException($exception);
+        }
+    }
+
+    /**
+     * @param array $data
+     * @param int   $expected
+     * @param bool  $shouldCrash
+     *
+     * @dataProvider provideAssertCountCases
+     */
+    public function testAssertCount($data, $expected, $shouldCrash)
+    {
+        if ($shouldCrash) {
+            $this->expectException(Warning::class);
+        }
+
+        $this->assertCount($expected, $data);
+    }
+
+    public function provideAssertCountCases()
+    {
+        return array(
+            array(array('foo', 'bar'), 2, false),
+            array(array(), 0, false),
+            array(array(), -2, true),
+        );
+    }
+
+    /**
+     * @param array $data
+     * @param int   $expected
+     * @param bool  $shouldCrash
+     *
+     * @dataProvider provideAssertNotCountCases
+     */
+    public function testAssertNotCount($data, $expected, $shouldCrash)
+    {
+        if ($shouldCrash) {
+            $this->expectException(Warning::class);
+        }
+
+        $this->assertNotCount($expected, $data);
+    }
+
+    public function provideAssertNotCountCases()
+    {
+        return array(
+            array(array('foo', 'bar'), -2, false),
+            array(array(), 10, false),
+            array(array(), -2, true),
+        );
+    }
+
+    /**
+     * @param string $key
+     * @param int    $expected
+     * @param bool   $shouldCrash
+     *
+     * @dataProvider provideAssertAttributeCountCases
+     */
+    public function testAssertAttributeCount($key, $expected, $shouldCrash)
+    {
+        if ($shouldCrash) {
+            $this->expectException(Warning::class);
+        }
+
+        $this->assertAttributeCount($expected, $key, $this);
+    }
+
+    public function provideAssertAttributeCountCases()
+    {
+        return array(
+            array('fixtureAttributePositive', count($this->fixtureAttributePositive), false),
+            array('fixtureAttributeZero', count($this->fixtureAttributeZero), false),
+            array('fixtureAttributeZero', -1, true),
+        );
+    }
+
+    /**
+     * @param string $key
+     * @param int    $expected
+     * @param bool   $shouldCrash
+     *
+     * @dataProvider provideAssertAttributeCountCases
+     */
+    public function testAssertAttributeNotCount($key, $expected, $shouldCrash)
+    {
+        if ($shouldCrash) {
+            $this->expectException(Warning::class);
+        }
+
+        $this->assertAttributeNotCount($expected, $key, $this);
+    }
+
+    public function provideAssertAttributeNotCountCases()
+    {
+        return array(
+            array('fixtureAttributePositive', 10 + count($this->fixtureAttributePositive), false),
+            array('fixtureAttributeZero', 10 + count($this->fixtureAttributeZero), false),
+            array('fixtureAttributeZero', -1, true),
+        );
+    }
+}