Cleanup

src/Chunk.php

@@ -11,30 +11,15 @@
 
 final class Chunk
 {
-    /**
-     * @var int
-     */
-    private $start;
+    private int $start;
 
-    /**
-     * @var int
-     */
-    private $startRange;
+    private int $startRange;
 
-    /**
-     * @var int
-     */
-    private $end;
+    private int $end;
 
-    /**
-     * @var int
-     */
-    private $endRange;
+    private int $endRange;
 
-    /**
-     * @var Line[]
-     */
-    private $lines;
+    private array $lines;
 
     public function __construct(int $start = 0, int $startRange = 1, int $end = 0, int $endRange = 1, array $lines = [])
     {
@@ -66,15 +51,15 @@ public function getEndRange(): int
     }
 
     /**
-     * @return Line[]
+     * @psalm-return list<Line>
      */
     public function getLines(): array
     {
         return $this->lines;
     }
 
     /**
-     * @param Line[] $lines
+     * @psalm-param list<Line> $lines
      */
     public function setLines(array $lines): void
     {

src/Diff.php

@@ -11,23 +11,17 @@
 
 final class Diff
 {
-    /**
-     * @var string
-     */
-    private $from;
+    private string $from;
 
-    /**
-     * @var string
-     */
-    private $to;
+    private string $to;
 
     /**
-     * @var Chunk[]
+     * @psalm-var list<Chunk>
      */
-    private $chunks;
+    private array $chunks;
 
     /**
-     * @param Chunk[] $chunks
+     * @psalm-param list<Chunk> $chunks
      */
     public function __construct(string $from, string $to, array $chunks = [])
     {
@@ -47,15 +41,15 @@ public function getTo(): string
     }
 
     /**
-     * @return Chunk[]
+     * @psalm-return list<Chunk>
      */
     public function getChunks(): array
     {
         return $this->chunks;
     }
 
     /**
-     * @param Chunk[] $chunks
+     * @psalm-param list<Chunk> $chunks
      */
     public function setChunks(array $chunks): void
     {

src/Differ.php

@@ -18,17 +18,13 @@
 use function count;
 use function current;
 use function end;
-use function get_class;
-use function gettype;
 use function is_array;
-use function is_object;
 use function is_string;
 use function key;
 use function min;
 use function preg_split;
 use function prev;
 use function reset;
-use function sprintf;
 use function substr;
 use SebastianBergmann\Diff\Output\DiffOutputBuilderInterface;
 use SebastianBergmann\Diff\Output\UnifiedDiffOutputBuilder;
@@ -45,44 +41,14 @@ final class Differ
 
     public const NO_LINE_END_EOF_WARNING = 4;
 
-    /**
-     * @var DiffOutputBuilderInterface
-     */
-    private $outputBuilder;
-
-    /**
-     * @param DiffOutputBuilderInterface $outputBuilder
-     *
-     * @throws InvalidArgumentException
-     */
-    public function __construct($outputBuilder = null)
+    private DiffOutputBuilderInterface|UnifiedDiffOutputBuilder $outputBuilder;
+
+    public function __construct(DiffOutputBuilderInterface $outputBuilder)
     {
-        if ($outputBuilder instanceof DiffOutputBuilderInterface) {
-            $this->outputBuilder = $outputBuilder;
-        } elseif (null === $outputBuilder) {
-            $this->outputBuilder = new UnifiedDiffOutputBuilder;
-        } elseif (is_string($outputBuilder)) {
-            // PHPUnit 6.1.4, 6.2.0, 6.2.1, 6.2.2, and 6.2.3 support
-            // @see https://github.com/sebastianbergmann/phpunit/issues/2734#issuecomment-314514056
-            // @deprecated
-            $this->outputBuilder = new UnifiedDiffOutputBuilder($outputBuilder);
-        } else {
-            throw new InvalidArgumentException(
-                sprintf(
-                    'Expected builder to be an instance of DiffOutputBuilderInterface, <null> or a string, got %s.',
-                    is_object($outputBuilder) ? 'instance of "' . get_class($outputBuilder) . '"' : gettype($outputBuilder) . ' "' . $outputBuilder . '"'
-                )
-            );
-        }
+        $this->outputBuilder = $outputBuilder;
     }
 
-    /**
-     * Returns the diff between two arrays or strings as string.
-     *
-     * @param array|string $from
-     * @param array|string $to
-     */
-    public function diff($from, $to, LongestCommonSubsequenceCalculator $lcs = null): string
+    public function diff(array|string $from, array|string $to, LongestCommonSubsequenceCalculator $lcs = null): string
     {
         $diff = $this->diffToArray(
             $this->normalizeDiffInput($from),
@@ -93,33 +59,14 @@ public function diff($from, $to, LongestCommonSubsequenceCalculator $lcs = null)
         return $this->outputBuilder->getDiff($diff);
     }
 
-    /**
-     * Returns the diff between two arrays or strings as array.
-     *
-     * Each array element contains two elements:
-     *   - [0] => mixed $token
-     *   - [1] => 2|1|0
-     *
-     * - 2: REMOVED: $token was removed from $from
-     * - 1: ADDED: $token was added to $from
-     * - 0: OLD: $token is not changed in $to
-     *
-     * @param array|string                       $from
-     * @param array|string                       $to
-     * @param LongestCommonSubsequenceCalculator $lcs
-     */
-    public function diffToArray($from, $to, LongestCommonSubsequenceCalculator $lcs = null): array
+    public function diffToArray(array|string $from, array|string $to, LongestCommonSubsequenceCalculator $lcs = null): array
     {
         if (is_string($from)) {
             $from = $this->splitStringByLines($from);
-        } elseif (!is_array($from)) {
-            throw new InvalidArgumentException('"from" must be an array or string.');
         }
 
         if (is_string($to)) {
             $to = $this->splitStringByLines($to);
-        } elseif (!is_array($to)) {
-            throw new InvalidArgumentException('"to" must be an array or string.');
         }
 
         [$from, $to, $start, $end] = self::getArrayDiffParted($from, $to);
@@ -172,12 +119,7 @@ public function diffToArray($from, $to, LongestCommonSubsequenceCalculator $lcs
         return $diff;
     }
 
-    /**
-     * Casts variable to string if it is not a string or array.
-     *
-     * @return array|string
-     */
-    private function normalizeDiffInput($input)
+    private function normalizeDiffInput(array|string $input)
     {
         if (!is_array($input) && !is_string($input)) {
             return (string) $input;
@@ -186,9 +128,6 @@ private function normalizeDiffInput($input)
         return $input;
     }
 
-    /**
-     * Checks if input is string, if so it will split it line-by-line.
-     */
     private function splitStringByLines(string $input): array
     {
         return preg_split('/(.*\R)/', $input, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
@@ -209,21 +148,13 @@ private function selectLcsImplementation(array $from, array $to): LongestCommonS
         return new TimeEfficientLongestCommonSubsequenceCalculator;
     }
 
-    /**
-     * Calculates the estimated memory footprint for the DP-based method.
-     *
-     * @return float|int
-     */
-    private function calculateEstimatedFootprint(array $from, array $to)
+    private function calculateEstimatedFootprint(array $from, array $to): float|int
     {
         $itemSize = PHP_INT_SIZE === 4 ? 76 : 144;
 
         return $itemSize * min(count($from), count($to)) ** 2;
     }
 
-    /**
-     * Returns true if line ends don't match in a diff.
-     */
     private function detectUnmatchedLineEndings(array $diff): bool
     {
         $newLineBreaks = ['' => true];

src/Line.php

@@ -17,15 +17,9 @@ final class Line
 
     public const UNCHANGED = 3;
 
-    /**
-     * @var int
-     */
-    private $type;
-
-    /**
-     * @var string
-     */
-    private $content;
+    private int $type;
+
+    private string $content;
 
     public function __construct(int $type = self::UNCHANGED, string $content = '')
     {

src/Output/DiffOnlyOutputBuilder.php

@@ -22,10 +22,7 @@
  */
 final class DiffOnlyOutputBuilder implements DiffOutputBuilderInterface
 {
-    /**
-     * @var string
-     */
-    private $header;
+    private string $header;
 
     public function __construct(string $header = "--- Original\n+++ New\n")
     {

src/Output/StrictUnifiedDiffOutputBuilder.php

@@ -33,7 +33,7 @@
  */
 final class StrictUnifiedDiffOutputBuilder implements DiffOutputBuilderInterface
 {
-    private static $default = [
+    private static array $default = [
         'collapseRanges'      => true, // ranges of length one are rendered with the trailing `,1`
         'commonLineThreshold' => 6,    // number of same lines before ending a new hunk and creating a new one (if needed)
         'contextLines'        => 3,    // like `diff:  -u, -U NUM, --unified[=NUM]`, for patch/git apply compatibility best to keep at least @ 3
@@ -43,30 +43,21 @@ final class StrictUnifiedDiffOutputBuilder implements DiffOutputBuilderInterface
         'toFileDate'          => null,
     ];
 
-    /**
-     * @var bool
-     */
-    private $changed;
+    private bool $changed;
 
-    /**
-     * @var bool
-     */
-    private $collapseRanges;
+    private bool $collapseRanges;
 
     /**
-     * @var int >= 0
+     * @psalm-var positive-int
      */
-    private $commonLineThreshold;
+    private int $commonLineThreshold;
 
-    /**
-     * @var string
-     */
-    private $header;
+    private string $header;
 
     /**
-     * @var int >= 0
+     * @psalm-var positive-int
      */
-    private $contextLines;
+    private int $contextLines;
 
     public function __construct(array $options = [])
     {

src/Output/UnifiedDiffOutputBuilder.php

@@ -26,30 +26,18 @@
  */
 final class UnifiedDiffOutputBuilder extends AbstractChunkOutputBuilder
 {
-    /**
-     * @var bool
-     */
-    private $collapseRanges = true;
+    private bool $collapseRanges = true;
 
-    /**
-     * @var int >= 0
-     */
-    private $commonLineThreshold = 6;
+    private int $commonLineThreshold = 6;
 
     /**
-     * @var int >= 0
+     * @psalm-var positive-int
      */
     private $contextLines = 3;
 
-    /**
-     * @var string
-     */
-    private $header;
+    private string $header;
 
-    /**
-     * @var bool
-     */
-    private $addLineNumbers;
+    private bool $addLineNumbers;
 
     public function __construct(string $header = "--- Original\n+++ New\n", bool $addLineNumbers = false)
     {

tests/ChunkTest.php

@@ -18,10 +18,7 @@
  */
 final class ChunkTest extends TestCase
 {
-    /**
-     * @var Chunk
-     */
-    private $chunk;
+    private Chunk $chunk;
 
     protected function setUp(): void
     {