From 7299b516b2f92f7816f00f73017d03875200e9b3 Mon Sep 17 00:00:00 2001
From: Sergey Romanenko <sergey.romanenko@flextype.org>
Date: Sun, 8 May 2022 16:22:20 +0300
Subject: [PATCH] Strings 4.3.0

---
 CHANGELOG.md          |  9 +++++++++
 src/Strings.php       | 40 ++++++++++++++++++++++++++++++++++++++++
 tests/StringsTest.php | 18 ++++++++++++++++++
 3 files changed, 67 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2b79ccd..ea241c4 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,12 @@
+<a name="4.3.0"></a>
+# [4.3.0](https://github.com/glowyphp/strings) (2022-05-08)
+* Added isNull() method.
+* Added isInteger() method.
+* Added isFloat() method.
+* Added isUuid() method.
+* Added toNull() method.
+* Method pipe() returns a new instance of the class.
+
 <a name="4.2.0"></a>
 # [4.2.0](https://github.com/glowyphp/strings) (2022-01-01)
 * Added isHexColor() method.
diff --git a/src/Strings.php b/src/Strings.php
index 62ed9a8..6abc3d8 100644
--- a/src/Strings.php
+++ b/src/Strings.php
@@ -2029,6 +2029,36 @@ public function isHTML(): bool
         return $this->toString() !== strip_tags($this->toString());
     }
 
+    /**
+     * Determine whether the string is integer.
+     * 
+     * @return bool Returns TRUE on success or FALSE otherwise.
+     */
+    public function isInteger(): bool
+    {
+        return (bool) filter_var($this->toString(), FILTER_VALIDATE_INT);
+    }
+
+    /**
+     * Determine whether the string is float.
+     * 
+     * @return bool Returns TRUE on success or FALSE otherwise.
+     */
+    public function isFloat(): bool
+    {
+        return ((bool) filter_var($this->toString(), FILTER_VALIDATE_FLOAT) !== $this->isInteger());
+    }
+
+    /**
+     * Determine whether the string is null.
+     * 
+     * @return bool Returns TRUE on success or FALSE otherwise.
+     */
+    public function isNull(): bool
+    {
+        return $this->toString() === null || $this->toString() === 'null';
+    }
+
     /**
      * Determine whether the string is Boolean.
      *
@@ -2105,6 +2135,16 @@ public function toFloat(): float
         return floatval($this->string);
     }
 
+    /**
+     * Return Strings object as null.
+     *
+     * @return float Return Strings object as null.
+     */
+    public function toNull(): float
+    {
+        return null;
+    }
+
     /**
      * Returns a boolean representation of the given logical string value.
      *
diff --git a/tests/StringsTest.php b/tests/StringsTest.php
index 60395f1..486742c 100644
--- a/tests/StringsTest.php
+++ b/tests/StringsTest.php
@@ -849,6 +849,24 @@
     $this->assertFalse(Strings::create('fòôbàřs')->isIP());
 });
 
+test('test isInteger() method', function (): void {
+    $this->assertTrue(Strings::create('1')->isInteger());
+    $this->assertFalse(Strings::create('1.0')->isInteger());
+    $this->assertFalse(Strings::create('Foo')->isInteger());
+});
+
+test('test isFloat() method', function (): void {
+    $this->assertFalse(Strings::create('1')->isFloat());
+    $this->assertTrue(Strings::create('0.1')->isFloat());
+    $this->assertTrue(Strings::create('1.0')->isFloat());
+    $this->assertTrue(Strings::create('0.1')->isFloat());
+    $this->assertFalse(Strings::create('Foo')->isFloat());
+});
+
+test('test isNull() method', function (): void {
+    $this->assertTrue(Strings::create('null')->isNull());
+});
+
 test('test isMAC() method', function (): void {
     $this->assertTrue(Strings::create('00:11:22:33:44:55')->isMAC());
     $this->assertFalse(Strings::create('127.0.0.1')->isMAC());