public function test_compose()
{
$expected = ["2", "4", "6", "8", "10"];
$x2 = f::op('*', [2]);
$x2_str = f::compose($x2, "strval");
$actual = array_map($x2_str, range(1, 5));
$this->assertContainsOnly('string', $actual);
$this->assertSame($expected, $actual);
}
public function test_functools_wrapper()
{
$f = function () {
};
$this->assertEquals(f::arity('explode'), _::arity('explode'));
$this->assertEquals(f::tuple('hoge'), _::tuple('hoge'));
$this->assertEquals(f::cons("a", "b"), _::cons("a", "b"));
$this->assertEquals(f::curry($f), _::curry($f));
$this->assertEquals(f::fix($f), _::fix($f, $f));
$this->assertEquals(f::compose($f, $f), _::compose($f, $f));
}
