Functional\Tests\ReduceTest::testReducing PHP Method

    public function testReducing()
    {
        $this->currentCollection = $this->list;
        $this->assertSame('0:one,1:two,2:three', reduce_left($this->list, [$this, 'functionalCallback']));
        $this->assertSame('default,0:one,1:two,2:three', reduce_left($this->list, [$this, 'functionalCallback'], 'default'));
        $this->assertSame('2:three,1:two,0:one', reduce_right($this->list, [$this, 'functionalCallback']));
        $this->assertSame('default,2:three,1:two,0:one', reduce_right($this->list, [$this, 'functionalCallback'], 'default'));
        $this->currentCollection = $this->listIterator;
        $this->assertSame('0:one,1:two,2:three', reduce_left($this->listIterator, [$this, 'functionalCallback']));
        $this->assertSame('default,0:one,1:two,2:three', reduce_left($this->listIterator, [$this, 'functionalCallback'], 'default'));
        $this->assertSame('2:three,1:two,0:one', reduce_right($this->listIterator, [$this, 'functionalCallback']));
        $this->assertSame('default,2:three,1:two,0:one', reduce_right($this->listIterator, [$this, 'functionalCallback'], 'default'));
        $this->assertSame('initial', reduce_left([], function () {
        }, 'initial'));
        $this->assertNull(reduce_left([], function () {
        }));
        $this->assertNull(reduce_left([], function () {
        }, null));
        $this->assertSame('initial', reduce_left(new ArrayIterator([]), function () {
        }, 'initial'));
        $this->assertNull(reduce_left(new ArrayIterator([]), function () {
        }));
        $this->assertNull(reduce_left(new ArrayIterator([]), function () {
        }, null));
        $this->assertSame('initial', reduce_right([], function () {
        }, 'initial'));
        $this->assertNull(reduce_right([], function () {
        }));
        $this->assertNull(reduce_right([], function () {
        }, null));
        $this->assertSame('initial', reduce_right(new ArrayIterator([]), function () {
        }, 'initial'));
        $this->assertNull(reduce_right(new ArrayIterator([]), function () {
        }));
        $this->assertNull(reduce_right(new ArrayIterator([]), function () {
        }, null));
    }