Taken into account data reader limit in OffsetPaginator::getTotalItems()

CHANGELOG.md

@@ -27,8 +27,8 @@
 - New #176: Add `OrderHelper` (@vjik)
 - New #173, #184: Add `$caseSensitive` parameter to `Like` filter to control whether the search must be case-sensitive
   or not (@arogachev)
-- Enh #187: Limit set in data reader is now taken into account by offset paginator. Keyset paginator throws an exception
-  in this case (@samdark)
+- Enh #187, #196: Limit set in data reader is now taken into account by offset paginator. Keyset paginator throws
+  an exception in this case (@samdark, @vjik)
 - Chg #187: Add `FilterableDataInterface::getFilter()`, `LimitableDataInterface::getLimit()`,
   `OffsetableDataInterface::getOffset()` (@samdark)
 - Chg #187: `LimitableDataInterface::withLimit()` now accepts `null` to indicate "no limit". `0` is now a valid limit

infection.json.dist

@@ -29,7 +29,8 @@
         },
         "GreaterThan": {
             "ignoreSourceCodeByRegex": [
-                ".*if \\(\\$dataReaderLimit !== null && \\$this->getOffset\\(\\) \\+ \\$this->pageSize > \\$dataReaderLimit\\) \\{.*"
+                ".*if \\(\\$dataReaderLimit !== null && \\$this->getOffset\\(\\) \\+ \\$this->pageSize > \\$dataReaderLimit\\) \\{.*",
+                ".*if \\(\\$dataReaderLimit !== null && \\$count > \\$dataReaderLimit\\) \\{.*"
             ]
         }
     }

src/Paginator/OffsetPaginator.php

@@ -199,7 +199,14 @@ public function getOffset(): int
      */
     public function getTotalItems(): int
     {
-        return $this->dataReader->count();
+        $count = $this->dataReader->count();
+
+        $dataReaderLimit = $this->dataReader->getLimit();
+        if ($dataReaderLimit !== null && $count > $dataReaderLimit) {
+            return $dataReaderLimit;
+        }
+
+        return $count;
     }
 
     /**

tests/Paginator/OffsetPaginatorTest.php

@@ -616,6 +616,15 @@ public function testWithNulledPageToken(): void
         $this->assertFalse($token->isPrevious);
     }
 
+    public function testLimitedDataReaderTotalItems(): void
+    {
+        $dataReader = (new IterableDataReader(self::DEFAULT_DATASET))->withLimit(3);
+
+        $paginator = new OffsetPaginator($dataReader);
+
+        $this->assertSame(3, $paginator->getTotalItems());
+    }
+
     public function testLimitedDataReaderReducedPage(): void
     {
         $dataReader = (new IterableDataReader(self::DEFAULT_DATASET))->withLimit(3);
@@ -630,6 +639,7 @@ public function testLimitedDataReaderReducedPage(): void
         }
 
         $this->assertSame(1, $count);
+        $this->assertSame(3, $paginator->getTotalItems());
     }
 
     public function testLimitedDataReaderEqualPage(): void