+
+ /**
+ * Test normalize_spaces.
+ */
+ public function testNormalizeSpace()
+ {
+ $str = ' foo bar is important ';
+ $this->assertEquals('foo bar is important', normalize_spaces($str));
+ $this->assertEquals('foo', normalize_spaces('foo'));
+ $this->assertEquals('', normalize_spaces(''));
+ $this->assertEquals(null, normalize_spaces(null));
+ }