Merge pull request #399 from mertasan/sequence

Fix: `sequence()` can generate false positives

src/Expectation.php

@@ -154,9 +154,10 @@ final class Expectation
             throw new BadMethodCallException('Expectation value is not iterable.');
         }
 
-        $value  = is_array($this->value) ? $this->value : iterator_to_array($this->value);
-        $keys   = array_keys($value);
-        $values = array_values($value);
+        $value          = is_array($this->value) ? $this->value : iterator_to_array($this->value);
+        $keys           = array_keys($value);
+        $values         = array_values($value);
+        $callbacksCount = count($callbacks);
 
         $index = 0;
 
@@ -165,6 +166,10 @@ final class Expectation
             $index       = $index < count($values) - 1 ? $index + 1 : 0;
         }
 
+        if ($callbacksCount > count($values)) {
+            Assert::assertLessThanOrEqual(count($value), count($callbacks));
+        }
+
         foreach ($values as $key => $item) {
             if (is_callable($callbacks[$key])) {
                 call_user_func($callbacks[$key], new self($item), new self($keys[$key]));

tests/.snapshots/success.txt

@@ -184,7 +184,7 @@
   ✓ an exception is thrown if the the type is not iterable
   ✓ allows for sequences of checks to be run on iterable data
   ✓ loops back to the start if it runs out of sequence items
-  ✓ it works if the number of items in the iterable is smaller than the number of expectations
+  ✓ fails if the number of iterable items is greater than the number of expectations
   ✓ it works with associative arrays
   ✓ it can be passed non-callable values
   ✓ it can be passed a mixture of value types

tests/Features/Expect/sequence.php

@@ -1,5 +1,7 @@
 <?php
 
+use PHPUnit\Framework\ExpectationFailedException;
+
 test('an exception is thrown if the the type is not iterable', function () {
     expect('Foobar')->each->sequence();
 })->throws(BadMethodCallException::class, 'Expectation value is not iterable.');
@@ -26,16 +28,14 @@ test('loops back to the start if it runs out of sequence items', function () {
     expect(static::getCount())->toBe(16);
 });
 
-test('it works if the number of items in the iterable is smaller than the number of expectations', function () {
+test('fails if the number of iterable items is greater than the number of expectations', function () {
     expect([1, 2])
         ->sequence(
             function ($expectation) { $expectation->toBeInt()->toEqual(1); },
             function ($expectation) { $expectation->toBeInt()->toEqual(2); },
             function ($expectation) { $expectation->toBeInt()->toEqual(3); },
         );
-
-    expect(static::getCount())->toBe(4);
-});
+})->throws(ExpectationFailedException::class);
 
 test('it works with associative arrays', function () {
     expect(['foo' => 'bar', 'baz' => 'boom'])