IterableTest for a future version

tests/Pipeline/IterableTest.php

@@ -0,0 +1,97 @@
+<?php
+/*
+ * Copyright 2017, 2018 Alexey Kopytko <alexey@kopytko.com>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+declare(strict_types=1);
+
+namespace Pipeline;
+
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @covers \Pipeline\Standard
+ * @covers \Pipeline\Principal
+ */
+class IterableTest extends TestCase
+{
+    private static $usesIterable;
+
+    public static function setUpBeforeClass()
+    {
+        if (PHP_VERSION_ID < 70100) {
+            self::$usesIterable = false;
+
+            return;
+        }
+
+        $reflection = new \ReflectionClass(Standard::class);
+        $type = $reflection->getConstructor()->getParameters()[0]->getType();
+        self::$usesIterable = $type->isBuiltin(); // Traversable isn't builtin
+    }
+
+    protected function setUp()
+    {
+        if (!self::$usesIterable) {
+            $this->markTestSkipped();
+        }
+    }
+
+    public function testArrayToArray()
+    {
+        $pipeline = new Standard([1, 2, 3]);
+        $this->assertEquals([1, 2, 3], $pipeline->toArray());
+    }
+
+    public function testArrayToIterator()
+    {
+        $pipeline = new Standard([1, 2, 3]);
+        $this->assertEquals([1, 2, 3], iterator_to_array($pipeline));
+    }
+
+    public function testEmptyArrayStaysEmpty()
+    {
+        $pipeline = new Standard([]);
+
+        $pipeline->filter()->map(function ($value) {
+            yield $value;
+            yield $value;
+        })->filter()->unpack();
+
+        $this->assertEquals([], $pipeline->toArray());
+    }
+
+    public function testArrayFilter()
+    {
+        $pipeline = new Standard([0, 1, 2, 3, 0]);
+        $this->assertEquals([1, 2, 3], $pipeline->filter()->toArray());
+    }
+
+    public function testArrayMap()
+    {
+        $pipeline = new Standard([1 => 0, 1, 2, 3]);
+        $this->assertEquals([0 => 0, 1, 2, 3], $pipeline->map(function ($value) {
+            return $value;
+        })->toArray());
+    }
+
+    public function testArrayMapFilter()
+    {
+        $pipeline = new Standard([1 => 0, 1, 2, 3]);
+        $this->assertEquals([0 => 1, 2, 3], $pipeline->map(function ($value) {
+            return $value;
+        })->filter()->toArray());
+    }
+}