#109: added Repeat class

fakes/Repeat.php

@@ -0,0 +1,56 @@
+<?php
+
+namespace MaxGoryunov\SavingIterator\Fakes;
+
+use Closure;
+
+/**
+ * Repeats some process several times and returns its result.
+ * @template X subject type
+ * @template Y result type
+ */
+final class Repeat
+{
+
+    /**
+     * Ctor.
+     *
+     * @phpstan-param T             $subject
+     * @phpstan-param Closure(T): Y $context
+     * @param mixed   $subject element to be processed.
+     * @param Closure $context context for the element.
+     */
+    public function __construct(
+        /**
+         * Element to be processed.
+         *
+         * @phpstan-var X
+         * @var mixed
+         */
+        private mixed $subject,
+
+        /**
+         * Context for the element.
+         *
+         * @phpstan-var Closure(X): Y
+         * @var Closure
+         */
+        private Closure $context
+    ) {
+    }
+
+    /**
+     * Returns several results of applying context to subject.
+     *
+     * @param int $count
+     * @phpstan-return Y[]
+     * @return mixed[]
+     */
+    public function times(int $count): array
+    {
+        return array_map(
+            $this->context,
+            array_fill(0, $count, $this->subject)
+        );
+    }
+}

tests/fakes/RepeatTest.php

@@ -0,0 +1,35 @@
+<?php
+
+namespace MaxGoryunov\SavingIterator\Tests\Fakes;
+
+use MaxGoryunov\SavingIterator\Fakes\Repeat;
+use PHPUnit\Framework\TestCase;
+use stdClass;
+
+/**
+ * @covers MaxGoryunov\SavingIterator\Fakes\Repeat
+ */
+final class RepeatTest extends TestCase
+{
+
+    /**
+     * @covers ::__construct
+     * @covers ::times
+     * 
+     * @small
+     *
+     * @return void
+     */
+    public function testReturnsExactAmountOfResults(): void
+    {
+        $times = 3;
+        $this->assertCount(
+            $times,
+            (new Repeat(
+                new stdClass(),
+                fn (stdClass $std) => $std->name = "Jane"
+            ))
+                ->times(3)
+        );
+    }
+}