Fixed psalm issues

Author: SmetDenis

src/Dates.php

@@ -203,19 +203,18 @@ public static function isYesterday($time): bool
     }
 
     /**
-     * Convert seconds to human readable format "H:i:s"
+     * Convert seconds to human-readable format "H:i:s"
      *
      * @param float $seconds
+     * @param int   $minValuableSeconds
      * @return string
      */
-    public static function formatTime(float $seconds): string
+    public static function formatTime(float $seconds, int $minValuableSeconds = 2): string
     {
-        $minValuableSeconds = 2;
-
         if ($seconds < $minValuableSeconds) {
             return number_format($seconds, 3) . ' sec';
         }
 
-        return (string)gmdate('H:i:s', (int)round($seconds, 0));
+        return gmdate('H:i:s', (int)round($seconds, 0)) ?: '';
     }
 }

src/Str.php

@@ -382,7 +382,7 @@ public static function isMBString(): bool
     public static function len(string $string): int
     {
         if (self::isMBString()) {
-            return (int)mb_strlen($string, self::$encoding);
+            return mb_strlen($string, self::$encoding) ?: 0;
         }
 
         return strlen($string);
@@ -508,7 +508,7 @@ public static function sub(string $string, int $start, int $length = 0): string
                 $length = self::len($string);
             }
 
-            return (string)mb_substr($string, $start, $length, self::$encoding);
+            return mb_substr($string, $start, $length, self::$encoding) ?: '';
         }
 
         return (string)substr($string, $start, $length);
@@ -523,7 +523,7 @@ public static function sub(string $string, int $start, int $length = 0): string
     public static function low($string): string
     {
         if (self::isMBString()) {
-            return (string)mb_strtolower((string)$string, self::$encoding);
+            return mb_strtolower((string)$string, self::$encoding) ?: '';
         }
 
         return strtolower((string)$string);
@@ -540,7 +540,7 @@ public static function low($string): string
     public static function up($string): string
     {
         if (self::isMBString()) {
-            return (string)mb_strtoupper((string)$string, self::$encoding);
+            return mb_strtoupper((string)$string, self::$encoding) ?: '';
         }
 
         return strtoupper((string)$string);
@@ -556,7 +556,7 @@ public static function up($string): string
     public static function subCount(string $haystack, string $needle): int
     {
         if (self::isMBString()) {
-            return (int)mb_substr_count($haystack, $needle, self::$encoding);
+            return mb_substr_count($haystack, $needle, self::$encoding) ?: 0;
         }
 
         return substr_count($haystack, $needle);

tests/DatesTest.php

@@ -163,5 +163,9 @@ public function testTimeFormat(): void
         isSame('00:00:03', Dates::formatTime(2.56789));
         isSame('00:00:02', Dates::formatTime(2));
         isSame('00:00:50', Dates::formatTime(50));
+        isSame('00:00:00', Dates::formatTime(0, 0));
+        isSame('00:00:01', Dates::formatTime(1, 0));
+        isSame('00:00:02', Dates::formatTime(2, 0));
+        isSame('00:00:02', Dates::formatTime(1.9999, 0));
     }
 }