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vendor/react/partial/tests/BindTest.php

@@ -0,0 +1,85 @@
+<?php
+
+namespace React\Partial;
+
+class BindTest extends \PHPUnit_Framework_TestCase
+{
+    public function testBindWithNoArgs()
+    {
+        $add = $this->createAddFunction();
+        $newAdd = bind($add);
+        $this->assertSame(6, $newAdd(1, 5));
+    }
+
+    public function testBindWithOneArg()
+    {
+        $add = $this->createAddFunction();
+        $addOne = bind($add, 1);
+        $this->assertSame(6, $addOne(5));
+    }
+
+    public function testBindWithTwoArgs()
+    {
+        $add = $this->createAddFunction();
+        $addOneAndFive = bind($add, 1, 5);
+        $this->assertSame(6, $addOneAndFive());
+    }
+
+    public function testBindWithPlaceholder()
+    {
+        $add = $this->createAddFunction();
+        $addFun = bind($add, …(), 10);
+        $this->assertSame(20, $addFun(10));
+        $this->assertSame(30, $addFun(20));
+    }
+
+    public function testBindWithMultiplePlaceholders()
+    {
+        $prod = $this->createProdFunction();
+        $prodTwo = bind($prod, …(), 2, …());
+        $this->assertSame(4, $prodTwo(1, 2));
+        $this->assertSame(6, $prodTwo(1, 3));
+        $this->assertSame(8, $prodTwo(2, 2));
+        $this->assertSame(24, $prodTwo(3, 4));
+        $this->assertSame(48, $prodTwo(3, 8));
+    }
+
+    public function testPlaceholderParameterPosition()
+    {
+        $substr = bind('substr', …(), 0, …());
+        $this->assertSame('foo', $substr('foo', 3));
+        $this->assertSame('fo', $substr('foo', 2));
+        $this->assertSame('f', $substr('foo', 1));
+    }
+
+    /**
+     * @expectedException InvalidArgumentException
+     * @expectedExceptionMessage Cannot resolve parameter placeholder at position 0. Parameter stack is empty
+     */
+    public function testStringConversion()
+    {
+        $add = $this->createAddFunction();
+        $addTwo = bind($add, …(), 2);
+
+        $addTwo();
+    }
+
+    public function testAliasForUnicodePlaceholderFunction()
+    {
+        $this->assertSame(…(), placeholder());
+    }
+
+    private function createAddFunction()
+    {
+        return function ($a, $b) {
+            return $a + $b;
+        };
+    }
+
+    private function createProdFunction()
+    {
+        return function ($a, $b, $c) {
+            return $a * $b * $c;
+        };
+    }
+}