Fix mutation coverage

config/infection.json.dist

@@ -32,7 +32,8 @@
         },
         "DecrementInteger": {
             "ignore": [
-                "Psl\\DataStructure\\PriorityQueue::peek"
+                "Psl\\DataStructure\\PriorityQueue::peek",
+                "Psl\\DateTime\\TemporalConvenienceMethodsTrait::since"
             ]
         },
         "FunctionCallRemoval": {
@@ -42,7 +43,8 @@
         },
         "IncrementInteger": {
             "ignore": [
-                "Psl\\DataStructure\\PriorityQueue::peek"
+                "Psl\\DataStructure\\PriorityQueue::peek",
+                "Psl\\DateTime\\TemporalConvenienceMethodsTrait::since"
             ]
         },
         "LogicalNot": {
@@ -58,6 +60,7 @@
         },
         "Throw_": {
             "ignore": [
+                "Psl\\DateTime\\DateTime::__construct",
                 "Psl\\File\\ReadHandle::__construct",
                 "Psl\\File\\WriteHandle::__construct",
                 "Psl\\File\\ReadWriteHandle::__construct",

src/Psl/DateTime/DateTimeConvenienceMethodsTrait.php

@@ -398,15 +398,15 @@ public function plusMonths(int $months): static
             return $this;
         }
 
-        if (0 > $months) {
+        if ($months < 1) {
             return $this->minusMonths(-$months);
         }
 
         $plus_years = Math\div($months, MONTHS_PER_YEAR);
         $months_left = $months - ($plus_years * MONTHS_PER_YEAR);
         $target_month = $this->getMonth() + $months_left;
 
-        if ($target_month > 12) {
+        if ($target_month > MONTHS_PER_YEAR) {
             $plus_years++;
             $target_month = $target_month - MONTHS_PER_YEAR;
         }
@@ -438,7 +438,7 @@ public function minusMonths(int $months): static
             return $this;
         }
 
-        if (0 > $months) {
+        if ($months < 1) {
             return $this->plusMonths(-$months);
         }
 
@@ -616,10 +616,9 @@ public function toString(null|DateStyle $date_style = null, null|TimeStyle $time
         $timestamp = $this->getTimestamp();
 
         /**
-         * @psalm-suppress InvalidOperand
          * @psalm-suppress ImpureMethodCall
          */
         return Internal\create_intl_date_formatter($date_style, $time_style, null, $timezone ?? $this->getTimezone(), $locale)
-            ->format($timestamp->getSeconds() + ($timestamp->getNanoseconds() / NANOSECONDS_PER_SECOND));
+            ->format($timestamp->getSeconds());
     }
 }

src/Psl/DateTime/Duration.php

@@ -674,27 +674,24 @@ public function toString(int $max_decimals = 3): string
         $sec_sign = $this->seconds < 0 || $this->nanoseconds < 0 ? '-' : '';
         $sec = Math\abs($this->seconds);
 
-        /** @var list<array{string, string}> $values */
-        $values = [
-            [((string) $this->hours), 'hour(s)'],
-            [((string) $this->minutes), 'minute(s)'],
-            [$sec_sign . ((string) $sec) . $decimal_part, 'second(s)'],
-        ];
 
-        // $end is the sizeof($values), use static value for better performance.
-        $end = 3;
-        while ($end > 0 && $values[$end - 1][0] === '0') {
-            --$end;
+        $containsHours = $this->hours !== 0;
+        $containsMinutes = $this->minutes !== 0;
+        $concatenatedSeconds = $sec_sign . ((string) $sec) . $decimal_part;
+        $containsSeconds = $concatenatedSeconds !== '0';
+
+        /** @var list<string> $output */
+        $output = [];
+        if ($containsHours) {
+            $output[] = ((string) $this->hours) . ' hour(s)';
         }
 
-        $start = 0;
-        while ($start < $end && $values[$start][0] === '0') {
-            ++$start;
+        if ($containsMinutes || ($containsHours && $containsSeconds)) {
+            $output[] = ((string) $this->minutes) . ' minute(s)';
         }
 
-        $output = [];
-        for ($i = $start; $i < $end; ++$i) {
-            $output[] = $values[$i][0] . ' ' . $values[$i][1];
+        if ($containsSeconds) {
+            $output[] = $concatenatedSeconds . ' second(s)';
         }
 
         return ([] === $output) ? '0 second(s)' : Str\join($output, ', ');

tests/unit/Collection/MutableSetTest.php

@@ -109,7 +109,7 @@ public function testArrayAccess(): void
 
         static::assertTrue(isset($set['foo']));
         static::assertSame('foo', $set['foo']);
-        
+
         unset($set['foo']);
         static::assertFalse(isset($set['foo']));
 
@@ -191,6 +191,16 @@ public function testOffsetGetThrowsForInvalidOffsetType(): void
         $set[false];
     }
 
+    public function testFromArrayKeysConstructor()
+    {
+        $set = MutableSet::fromArrayKeys(['foo' => 1, 'bar' => 1, 'baz' => 1]);
+
+        static::assertCount(3, $set);
+        static::assertTrue($set->contains('foo'));
+        static::assertTrue($set->contains('bar'));
+        static::assertTrue($set->contains('baz'));
+    }
+
     /**
      * @template T of array-key
      *

tests/unit/Collection/SetTest.php

@@ -26,4 +26,14 @@ protected function createFromList(array $items): Set
     {
         return Set::fromArray($items);
     }
+
+    public function testFromArrayKeysConstructor()
+    {
+        $set = Set::fromArrayKeys(['foo' => 1, 'bar' => 1, 'baz' => 1]);
+
+        static::assertCount(3, $set);
+        static::assertTrue($set->contains('foo'));
+        static::assertTrue($set->contains('bar'));
+        static::assertTrue($set->contains('baz'));
+    }
 }