pyodide/test/test_python.py

import time

import pytest


def test_init(selenium_standalone):
    assert ('Python initialization complete'
            in selenium_standalone.logs.splitlines())
    assert len(selenium_standalone.driver.window_handles) == 1


def test_webbrowser(selenium):
    selenium.run("import antigravity")
    time.sleep(2)
    assert len(selenium.driver.window_handles) == 2


def test_print(selenium):
    selenium.run("print('This should be logged')")
    assert 'This should be logged' in selenium.logs.splitlines()


def test_python2js(selenium):
    assert selenium.run_js('return pyodide.runPython("None") === undefined')
    assert selenium.run_js('return pyodide.runPython("True") === true')
    assert selenium.run_js('return pyodide.runPython("False") === false')
    assert selenium.run_js('return pyodide.runPython("42") === 42')
    assert selenium.run_js('return pyodide.runPython("3.14") === 3.14')
    # Need to test all three internal string representations in Python: UCS1,
    # UCS2 and UCS4
    assert selenium.run_js(
        'return pyodide.runPython("\'ascii\'") === "ascii"')
    assert selenium.run_js(
        'return pyodide.runPython("\'ιωδιούχο\'") === "ιωδιούχο"')
    assert selenium.run_js(
        'return pyodide.runPython("\'碘化物\'") === "碘化物"')
    assert selenium.run_js(
        'let x = pyodide.runPython("b\'bytes\'");\n'
        'return (x instanceof window.Uint8ClampedArray) && '
        '(x.length === 5) && '
        '(x[0] === 98)')
    assert selenium.run_js(
        """
        let x = pyodide.runPython("[1, 2, 3]");
        return ((x instanceof window.Array) && (x.length === 3) &&
                (x[0] == 1) && (x[1] == 2) && (x[2] == 3))
        """)
    assert selenium.run_js(
        """
        let x = pyodide.runPython("{42: 64}");
        return (typeof x === "object") && (x[42] === 64)
        """)
    assert selenium.run_js(
        """
        let x = pyodide.runPython("open('/foo.txt', 'wb')")
        return (x.tell() === 0)
        """)


def test_python2js_long_ints(selenium):
    assert selenium.run('2**30') == 2**30
    assert selenium.run('2**31') == 2**31
    assert selenium.run('2**30 - 1 + 2**30') == (2**30 - 1 + 2**30)
    assert selenium.run('2**32 / 2**4') == (2**32 / 2**4)
    assert selenium.run('-2**30') == -2**30
    assert selenium.run('-2**31') == -2**31


def test_python2js_numpy_dtype(selenium_standalone):
    selenium = selenium_standalone

    selenium.load_package('numpy')
    selenium.run("import numpy as np")

    expected_result = [[[0, 1], [2, 3]],
                       [[4, 5], [6, 7]]]

    def assert_equal():
        # We have to do this an element at a time, since the Selenium driver
        # for Firefox does not convert TypedArrays to Python correctly
        for i in range(2):
            for j in range(2):
                for k in range(2):
                    assert selenium.run_js(
                        f"return pyodide.pyimport('x')[{i}][{j}][{k}]"
                    ) == expected_result[i][j][k]

    for order in ('C', 'F'):
        for dtype in (
                'int8',
                'uint8',
                'int16',
                'uint16',
                'int32',
                'uint32',
                'int64',
                'uint64',
                'float32',
                'float64'
        ):
            selenium.run(
                f"""
                x = np.arange(8, dtype=np.{dtype})
                x = x.reshape((2, 2, 2))
                x = x.copy({order!r})
                """
            )
            assert_equal()
            classname = selenium.run_js(
                "return pyodide.pyimport('x')[0][0].constructor.name"
            )
            if order == 'C' and dtype not in ('uint64', 'int64'):
                # Here we expect a TypedArray subclass, such as Uint8Array, but
                # not a plain-old Array
                assert classname.endswith('Array')
                assert classname != 'Array'
            else:
                assert classname == 'Array'
            selenium.run(
                """
                x = x.byteswap().newbyteorder()
                """
            )
            assert_equal()
            classname = selenium.run_js(
                "return pyodide.pyimport('x')[0][0].constructor.name"
            )
            if order == 'C' and dtype in ('int8', 'uint8'):
                # Here we expect a TypedArray subclass, such as Uint8Array, but
                # not a plain-old Array -- but only for single byte types where
                # endianness doesn't matter
                assert classname.endswith('Array')
                assert classname != 'Array'
            else:
                assert classname == 'Array'

    assert selenium.run("np.array([True, False])") == [True, False]

    selenium.run(
        "x = np.array([['string1', 'string2'], ['string3', 'string4']])"
    )
    assert selenium.run_js("return pyodide.pyimport('x').length") == 2
    assert selenium.run_js("return pyodide.pyimport('x')[0][0]") == 'string1'
    assert selenium.run_js("return pyodide.pyimport('x')[1][1]") == 'string4'


def test_pythonexc2js(selenium):
    try:
        selenium.run_js('return pyodide.runPython("5 / 0")')
    except selenium.JavascriptException as e:
        assert 'ZeroDivisionError' in str(e)
    else:
        assert False, 'Expected exception'


def test_js2python(selenium):
    selenium.run_js(
        """
        window.jsstring = "碘化物";
        window.jsnumber0 = 42;
        window.jsnumber1 = 42.5;
        window.jsundefined = undefined;
        window.jsnull = null;
        window.jstrue = true;
        window.jsfalse = false;
        window.jspython = pyodide.pyimport("open");
        window.jsbytes = new Uint8Array([1, 2, 3]);
        window.jsfloats = new Float32Array([1, 2, 3]);
        window.jsobject = new XMLHttpRequest();
        """
    )
    assert selenium.run(
        'from js import jsstring\n'
        'jsstring == "碘化物"')
    assert selenium.run(
        'from js import jsnumber0\n'
        'jsnumber0 == 42')
    assert selenium.run(
        'from js import jsnumber1\n'
        'jsnumber1 == 42.5')
    assert selenium.run(
        'from js import jsundefined\n'
        'jsundefined is None')
    assert selenium.run(
        'from js import jstrue\n'
        'jstrue is True')
    assert selenium.run(
        'from js import jsfalse\n'
        'jsfalse is False')
    assert selenium.run(
        'from js import jspython\n'
        'jspython is open')
    assert selenium.run(
        """
        from js import jsbytes
        ((jsbytes.tolist() == [1, 2, 3])
         and (jsbytes.tobytes() == b"\x01\x02\x03"))
        """)
    assert selenium.run(
        """
        from js import jsfloats
        import struct
        expected = struct.pack("fff", 1, 2, 3)
        (jsfloats.tolist() == [1, 2, 3]) and (jsfloats.tobytes() == expected)
        """)
    assert selenium.run(
        'from js import jsobject\n'
        'str(jsobject) == "[object XMLHttpRequest]"')


@pytest.mark.parametrize('wasm_heap', (False, True))
@pytest.mark.parametrize(
        'jstype, pytype',
        (
         ('Int8Array', 'b'),
         ('Uint8Array', 'B'),
         ('Uint8ClampedArray', 'B'),
         ('Int16Array', 'h'),
         ('Uint16Array', 'H'),
         ('Int32Array', 'i'),
         ('Uint32Array', 'I'),
         ('Float32Array', 'f'),
         ('Float64Array', 'd')))
def test_typed_arrays(selenium, wasm_heap, jstype, pytype):
    if not wasm_heap:
        selenium.run_js(
            f'window.array = new {jstype}([1, 2, 3, 4]);\n')
    else:
        selenium.run_js(
            f"""
             var buffer = pyodide._module._malloc(
                   4 * {jstype}.BYTES_PER_ELEMENT);
             window.array = new {jstype}(
                   pyodide._module.HEAPU8.buffer, buffer, 4);
             window.array[0] = 1;
             window.array[1] = 2;
             window.array[2] = 3;
             window.array[3] = 4;
             """)
    assert selenium.run(
        f"""
         from js import array
         import struct
         expected = struct.pack("{pytype*4}", 1, 2, 3, 4)
         print(array.format, array.tolist(), array.tobytes())
         ((array.format == "{pytype}")
          and array.tolist() == [1, 2, 3, 4]
          and array.tobytes() == expected
          and array.obj._has_bytes() is {not wasm_heap})
         """)


def test_import_js(selenium):
    result = selenium.run(
        """
        from js import window
        window.title = 'Foo'
        window.title
        """)
    assert result == 'Foo'


def test_pyimport_multiple(selenium):
    """See #1151"""
    selenium.run("v = 0.123")
    selenium.run_js("pyodide.pyimport('v')")
    selenium.run_js("pyodide.pyimport('v')")


def test_pyproxy(selenium):
    selenium.run(
        """
        class Foo:
          bar = 42
          def get_value(self, value):
            return value * 64
        f = Foo()
        """
    )
    assert selenium.run_js("return pyodide.pyimport('f').get_value(2)") == 128
    assert selenium.run_js("return pyodide.pyimport('f').bar") == 42
    assert selenium.run_js("return ('bar' in pyodide.pyimport('f'))")
    selenium.run_js("f = pyodide.pyimport('f'); f.baz = 32")
    assert selenium.run("f.baz") == 32
    assert set(selenium.run_js(
        "return Object.getOwnPropertyNames(pyodide.pyimport('f'))")) == set(
            ['__class__', '__delattr__', '__dict__', '__dir__',
             '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__',
             '__gt__', '__hash__', '__init__', '__init_subclass__', '__le__',
             '__lt__', '__module__', '__ne__', '__new__', '__reduce__',
             '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__',
             '__str__', '__subclasshook__', '__weakref__', 'bar', 'baz',
             'get_value', 'toString', 'prototype', 'arguments', 'caller'])
    assert selenium.run("hasattr(f, 'baz')")
    selenium.run_js("delete pyodide.pyimport('f').baz")
    assert not selenium.run("hasattr(f, 'baz')")
    assert selenium.run_js(
        "return pyodide.pyimport('f').toString()").startswith('<Foo')


def test_pyproxy_destroy(selenium):
    selenium.run(
        """
        class Foo:
          bar = 42
          def get_value(self, value):
            return value * 64
        f = Foo()
        """
    )
    try:
        selenium.run_js(
            """
            let f = pyodide.pyimport('f');
            console.assert(f.get_value(1) === 64);
            f.destroy();
            f.get_value();
            """)
    except selenium.JavascriptException as e:
        assert 'Object has already been destroyed' in str(e)
    else:
        assert False, 'Expected exception'


def test_jsproxy(selenium):
    assert selenium.run(
        """
        from js import document
        el = document.createElement('div')
        document.body.appendChild(el)
        document.body.children.length"""
        ) == 1
    assert selenium.run(
        "document.body.children[0].tagName") == 'DIV'
    assert selenium.run(
        "repr(document)") == '[object HTMLDocument]'
    selenium.run_js(
        "window.square = function (x) { return x*x; }")
    assert selenium.run(
        "from js import square\n"
        "square(2)") == 4
    assert selenium.run(
        "from js import ImageData\n"
        "ImageData.new(64, 64)")
    assert selenium.run(
        "from js import ImageData\n"
        "ImageData.typeof") == 'function'
    selenium.run_js(
        """
        class Point {
          constructor(x, y) {
            this.x = x;
            this.y = y;
          }
        }
        window.TEST = new Point(42, 43);""")
    assert selenium.run(
        """
        from js import TEST
        del TEST.y
        TEST.y""") is None
    selenium.run_js(
        """
        class Point {
          constructor(x, y) {
            this.x = x;
            this.y = y;
          }
        }
        window.TEST = new Point(42, 43);""")
    assert selenium.run(
        """
        from js import TEST
        del TEST['y']
        TEST['y']""") is None
    assert selenium.run(
        """
        from js import TEST
        TEST == TEST
        """)
    assert selenium.run(
        """
        from js import TEST
        TEST != 'foo'
        """)


def test_jsproxy_iter(selenium):
    selenium.run_js(
        """
        function makeIterator(array) {
          var nextIndex = 0;
          return {
            next: function() {
              return nextIndex < array.length ?
                {value: array[nextIndex++], done: false} :
                {done: true};
            }
          };
        }
        window.ITER = makeIterator([1, 2, 3]);""")
    assert selenium.run(
        "from js import ITER\n"
        "list(ITER)") == [1, 2, 3]


def test_jsproxy_implicit_iter(selenium):
    selenium.run_js(
        """
        window.ITER = [1, 2, 3];""")
    assert selenium.run(
        "from js import ITER, Object\n"
        "list(ITER)") == [1, 2, 3]
    assert selenium.run(
        "from js import ITER, Object\n"
        "list(ITER.values())") == [1, 2, 3]
    assert selenium.run(
        "from js import ITER, Object\n"
        "list(Object.values(ITER))") == [1, 2, 3]


def test_jsproxy_kwargs(selenium):
    selenium.run_js(
        """
        window.kwarg_function = ({ a = 1, b = 1 }) => {
            return a / b;
        };
        """
    )
    assert selenium.run(
        """
        from js import kwarg_function
        kwarg_function(b = 2, a = 10)
        """
    ) == 5


def test_open_url(selenium):
    assert selenium.run(
        """
        import pyodide
        pyodide.open_url('test/data.txt').read()
        """) == 'HELLO\n'


def test_open_url_cgi(selenium):
    assert selenium.run(
        """
        import pyodide
        pyodide.open_url('test/data.cgi').read()
        """) == 'HELLO\n'


def test_load_package_after_convert_string(selenium):
    """
    See #93.
    """
    selenium.run(
        "import sys\n"
        "x = sys.version")
    selenium.run_js(
        "var x = pyodide.pyimport('x')\n"
        "console.log(x)")
    selenium.load_package('kiwisolver')
    selenium.run(
        "import kiwisolver")


def test_version_info(selenium):
    from distutils.version import LooseVersion

    version_py_str = selenium.run("""
            import pyodide

            pyodide.__version__
            """)
    version_py = LooseVersion(version_py_str)
    assert version_py > LooseVersion('0.0.1')

    version_js_str = selenium.run_js("return pyodide.version()")
    version_js = LooseVersion(version_js_str)
    assert version_py == version_js


def test_recursive_list(selenium_standalone):
    selenium_standalone.run(
        """
        x = []
        x.append(x)
        """
    )
    selenium_standalone.run_js("x = pyodide.pyimport('x')")


def test_recursive_dict(selenium_standalone):
    selenium_standalone.run(
        """
        x = {}
        x[0] = x
        """
    )
    selenium_standalone.run_js("x = pyodide.pyimport('x')")


def test_runpythonasync(selenium_standalone):
    selenium_standalone.run_async(
        """
        import numpy as np
        x = np.zeros(5)
        """
    )
    for i in range(5):
        assert selenium_standalone.run_js(
            f"return pyodide.pyimport('x')[{i}] == 0"
        )


def test_runpythonasync_different_package_name(selenium_standalone):
    output = selenium_standalone.run_async(
        """
        import dateutil
        dateutil.__version__
        """
    )
    assert isinstance(output, str)


def test_runpythonasync_no_imports(selenium_standalone):
    output = selenium_standalone.run_async(
        """
        42
        """
    )
    assert output == 42


def test_runpythonasync_missing_import(selenium_standalone):
    try:
        selenium_standalone.run_async(
            """
            import foo
            """
        )
    except selenium_standalone.JavascriptException as e:
        assert "ModuleNotFoundError" in str(e)
    else:
        assert False


def test_runpythonasync_exception(selenium_standalone):
    try:
        selenium_standalone.run_async(
            """
            42 / 0
            """
        )
    except selenium_standalone.JavascriptException as e:
        assert "ZeroDivisionError" in str(e)
    else:
        assert False


def test_runpythonasync_exception_after_import(selenium_standalone):
    try:
        selenium_standalone.run_async(
            """
            import numpy as np
            x = np.empty(5)
            42 / 0
            """
        )
    except selenium_standalone.JavascriptException as e:
        assert "ZeroDivisionError" in str(e)
    else:
        assert False


def test_py(selenium_standalone):
    selenium_standalone.run(
        """
        def func():
            return 42
        """
    )

    assert selenium_standalone.run_js('return pyodide.globals.func()') == 42


def test_eval_nothing(selenium):
    assert selenium.run('# comment') is None
    assert selenium.run('') is None