[9.x] Improve test for blank in Helpers (#43887)

* [9.x] Improve test for blank in Helpers

* [9.x] Improve test for blank in Helpers

* [9.x] Improve test for blank in Helpers

fix style code

Author: moharami

tests/Support/SupportHelpersTest.php

@@ -34,6 +34,21 @@ public function testE()
         $this->assertEquals($str, e($html));
     }
 
+    public function testBlank()
+    {
+        $this->assertTrue(blank(null));
+        $this->assertTrue(blank(''));
+        $this->assertTrue(blank('  '));
+        $this->assertFalse(blank(10));
+        $this->assertFalse(blank(true));
+        $this->assertFalse(blank(false));
+        $this->assertFalse(blank(0));
+        $this->assertFalse(blank(0.0));
+
+        $object = new SupportTestCountable();
+        $this->assertTrue(blank($object));
+    }
+
     public function testClassBasename()
     {
         $this->assertSame('Baz', class_basename('Foo\Bar\Baz'));