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import { assert, assertEquals, assertThrows } from "./asserts.ts";
import {
kw,
NamedArgument,
ProxiedPyObject,
PyObject,
python,
type PythonProxy,
} from "../mod.ts";
const { version, executable } = python.import("sys");
console.log("Python version:", version);
console.log("Executable:", executable);
Deno.test("python version", () => {
assert(version.toString().match(/^\d+\.\d+\.\d+/));
});
Deno.test("types", async (t) => {
await t.step("bool", () => {
const value = python.bool(true);
assertEquals(value.valueOf(), true);
});
await t.step("int", () => {
const value = python.int(42);
assertEquals(value.valueOf(), 42);
});
await t.step("float", () => {
const value = python.float(42.0);
assertEquals(value.valueOf(), 42.0);
});
await t.step("str", () => {
const value = python.str("hello");
assertEquals(value.valueOf(), "hello");
const unicode = python.str("'δΈζ'");
assertEquals(unicode.valueOf(), "'δΈζ'");
});
await t.step("list", () => {
const value = python.list([1, 2, 3]);
assertEquals(value.valueOf(), [1, 2, 3]);
});
await t.step("dict", () => {
const value = python.dict({ a: 1, b: 2 });
assertEquals(
value.valueOf(),
new Map([
["a", 1],
["b", 2],
]),
);
});
await t.step("set", () => {
let value = python.set([1, 2, 3]);
assertEquals(value.valueOf(), new Set([1, 2, 3]));
value = PyObject.from(new Set([1, 2, 3]));
assertEquals(value.valueOf(), new Set([1, 2, 3]));
});
await t.step("tuple", () => {
const value = python.tuple([1, 2, 3]);
assertEquals(value.valueOf(), [1, 2, 3]);
});
});
Deno.test("object", async (t) => {
const { Person } = python.runModule(`
class Person:
def __init__(self, name):
self.name = name
`);
const person = new Person("John");
await t.step("get attr", () => {
assertEquals(person.name.valueOf(), "John");
});
await t.step("set attr", () => {
person.name = "Jane";
assertEquals(person.name.valueOf(), "Jane");
});
await t.step("has attr", () => {
assert("name" in person);
});
await t.step("dict item", () => {
const dict = python.dict({ prop: "value" });
assertEquals(dict.prop.valueOf(), "value");
});
await t.step("dict set item", () => {
const dict = python.dict({ prop: "value" });
dict.prop = "new value";
assertEquals(dict.prop.valueOf(), "new value");
});
await t.step("dict has item", () => {
const dict = python.dict({ prop: "value" });
assert("prop" in dict);
});
await t.step("dict not has item", () => {
const dict = python.dict({ prop: "value" });
assert(!("prop2" in dict));
});
await t.step("list index", () => {
const list = python.list([1, 2, 3]);
assertEquals(list[0].valueOf(), 1);
});
await t.step("list set index", () => {
const list = python.list([1, 2, 3]);
list[0] = 42;
assertEquals(list[0].valueOf(), 42);
});
await t.step("list iter", () => {
const array = [1, 2, 3];
const list = python.list(array);
let i = 0;
for (const v of list) {
assertEquals(v.valueOf(), array[i]);
i++;
}
});
});
Deno.test("named argument", async (t) => {
await t.step("single named argument", () => {
assertEquals(
python
.str("Hello, {name}!")
.format(kw`name=${"world"}`)
.valueOf(),
"Hello, world!",
);
});
await t.step(
"combination of positional parameters and named argument",
() => {
const { Test } = python.runModule(`
class Test:
def test(self, *args, **kwargs):
return all([len(args) == 3, "name" in kwargs])
`);
const t = new Test();
const d = python.dict({ a: 1, b: 2 });
const v = t.test(1, 2, new NamedArgument("name", "vampire"), d);
assertEquals(v.valueOf(), true);
},
);
});
Deno.test("numpy", () => {
const _np = python.import("numpy");
});
Deno.test("custom proxy", () => {
const np = python.import("numpy");
// We declare our own PythonProxy wrapper
const CustomProxy = class implements PythonProxy {
public readonly [ProxiedPyObject]: PyObject;
constructor(array: PythonProxy) {
this[ProxiedPyObject] = array[ProxiedPyObject];
}
};
// Wrap the result in our custom wrapper
const arr = new CustomProxy(np.array([1, 2, 3]));
// Then, we use the wrapped proxy as if it were an original PyObject
assertEquals(np.add(arr, 2).tolist().valueOf(), [3, 4, 5]);
});
Deno.test("slice", async (t) => {
await t.step("get", () => {
const list = python.list([1, 2, 3, 4, 5, 6, 7, 8, 9]);
assertEquals(list["1:"].valueOf(), [2, 3, 4, 5, 6, 7, 8, 9]);
assertEquals(list["1:2"].valueOf(), [2]);
assertEquals(list[":2"].valueOf(), [1, 2]);
assertEquals(list[":2:"].valueOf(), [1, 2]);
assertEquals(list["0:3:2"].valueOf(), [1, 3]);
assertEquals(list["-2:"].valueOf(), [8, 9]);
assertEquals(list["::2"].valueOf(), [1, 3, 5, 7, 9]);
});
await t.step("set", () => {
const np = python.import("numpy");
let list = np.array([1, 2, 3, 4, 5, 6, 7, 8, 9]);
list["1:"] = -5;
assertEquals(list.tolist().valueOf(), [1, -5, -5, -5, -5, -5, -5, -5, -5]);
list = np.array([1, 2, 3, 4, 5, 6, 7, 8, 9]);
list["1::3"] = -5;
assertEquals(list.tolist().valueOf(), [1, -5, 3, 4, -5, 6, 7, -5, 9]);
list = np.array([1, 2, 3, 4, 5, 6, 7, 8, 9]);
list["1:2:3"] = -5;
assertEquals(list.tolist().valueOf(), [1, -5, 3, 4, 5, 6, 7, 8, 9]);
});
});
Deno.test("slice list", async (t) => {
const np = python.import("numpy");
await t.step("get", () => {
const array = np.array([
[1, 2, 3],
[4, 5, 6],
[7, 8, 9],
]);
assertEquals(array["0, :"].tolist().valueOf(), [1, 2, 3]);
assertEquals(array["1:, ::2"].tolist().valueOf(), [
[4, 6],
[7, 9],
]);
assertEquals(array["1:, 0"].tolist().valueOf(), [4, 7]);
});
await t.step("set", () => {
const array = np.arange(15).reshape(3, 5);
array["1:, ::2"] = -99;
assertEquals(array.tolist().valueOf(), [
[0, 1, 2, 3, 4],
[-99, 6, -99, 8, -99],
[-99, 11, -99, 13, -99],
]);
});
await t.step("whitespaces", () => {
const array = np.array([
[1, 2, 3],
[4, 5, 6],
[7, 8, 9],
]);
assertEquals(array[" 1 : , : : 2 "].tolist().valueOf(), [
[4, 6],
[7, 9],
]);
});
await t.step("3d slicing", () => {
const a3 = np.array([[[10, 11, 12], [13, 14, 15], [16, 17, 18]], [
[20, 21, 22],
[23, 24, 25],
[26, 27, 28],
], [[30, 31, 32], [33, 34, 35], [36, 37, 38]]]);
assertEquals(a3["0, :, 1"].tolist().valueOf(), [11, 14, 17]);
});
await t.step("ellipsis", () => {
const a4 = np.arange(16).reshape(2, 2, 2, 2);
assertEquals(a4["1, ..., 1"].tolist().valueOf(), [[9, 11], [13, 15]]);
});
});
Deno.test("async", () => {
const { test } = python.runModule(
`
async def test():
return "ok"
`,
"async_test.py",
);
const aio = python.import("asyncio");
assertEquals(aio.run(test()).valueOf(), "ok");
});
Deno.test("callback", () => {
const { call } = python.runModule(
`
def call(cb):
return cb(61, reduce=1) + 1
`,
"cb_test.py",
);
const cb = python.callback((kw: { reduce: number }, num: number) => {
return num - kw.reduce + 8;
});
assertEquals(
call(cb).valueOf(),
69,
);
cb.destroy();
});
Deno.test("callback returns void", () => {
const { call } = python.runModule(
`
def call(cb):
cb()
`,
"cb_test.py",
);
const cb = python.callback(() => {
// return void
});
call(cb);
cb.destroy();
});
Deno.test("exceptions", async (t) => {
await t.step("simple exception", () => {
assertThrows(() => python.runModule("1 / 0"));
});
await t.step("exception with traceback", () => {
const np = python.import("numpy");
const array = np.zeros([2, 3, 4]);
assertThrows(() => array.shape = [3, 6]);
});
});
Deno.test("instance method", () => {
const { A } = python.runModule(
`
class A:
def b(self):
return 4
`,
"cb_test.py",
);
const [m, cb] = python.instanceMethod((_args, self) => {
return self.b();
});
// Modifying PyObject modifes A
PyObject.from(A).setAttr("a", m);
assertEquals(new A().a.call().valueOf(), 4);
cb.destroy();
});
Deno.test("callbacks have signature", async (t) => {
const inspect = python.import("inspect");
await t.step("empty arguments", () => {
const fn = python.callback(() => {});
assertEquals(inspect.signature(fn).toString(), "()");
fn.destroy();
});
await t.step("with no arguments", () => {
const fn = python.callback((_f, _b, _c) => {});
assertEquals(inspect.signature(fn).toString(), "(a, b, c)");
fn.destroy();
});
});
Deno.test("js exception inside python callback returns python exception", () => {
const pyCallback = python.callback(() => {
throw new Error("This is an intentional error from JS!");
});
const pyModule = python.runModule(
`
def call_the_callback(cb):
result = cb()
return result
`,
"test_module",
);
try {
pyModule.call_the_callback(pyCallback);
} catch (e) {
// deno-lint-ignore no-explicit-any
assertEquals((e as any).name, "PythonError");
} finally {
pyCallback.destroy();
}
});