flowmetal/components/milkshake/test/python/test_examples.py

#!/usr/bin/env python3

from milkshake import slurp, Symbol

from lark import Tree, Token
import pytest


@pytest.mark.parametrize(
    "input, val",
    [
        ("()", Tree("list", [])),
        ("nil", nil := Symbol("nil")),
        ("(nil nil nil)", Tree("list", [nil, nil, nil])),
        (
            "(/ + - * % ^ \\ & # @ ! = |)",
            Tree(
                "list",
                [
                    Symbol("/"),
                    Symbol("+"),
                    Symbol("-"),
                    Symbol("*"),
                    Symbol("%"),
                    Symbol("^"),
                    Symbol("\\"),
                    Symbol("&"),
                    Symbol("#"),
                    Symbol("@"),
                    Symbol("!"),
                    Symbol("="),
                    Symbol("|"),
                ],
            ),
        ),
        ("1.0", Tree("number", ["1.0"])),
        ("+1.0", Tree("number", ["+1.0"])),
        ("-1.0", Tree("number", ["-1.0"])),
        ("-10,000,000.0", Tree("number", ["-10,000,000.0"])),
        ("-10.000.000,0", Tree("number", ["-10.000.000,0"])),
        ("-10_000_000,0", Tree("number", ["-10_000_000,0"])),
        ("-10_000_000.0", Tree("number", ["-10_000_000.0"])),
        ("1e50", Tree("number", ["1e50"])),
        ("-1e-50", Tree("number", ["-1e-50"])),
        ("-1e+50", Tree("number", ["-1e+50"])),
        (
            "(+inf -inf inf nan +nan -nan)",
            Tree(
                "list",
                [
                    Symbol("+inf"),
                    Symbol("-inf"),
                    Symbol("inf"),
                    Symbol("nan"),
                    Symbol("+nan"),
                    Symbol("-nan"),
                ],
            ),
        ),
        ("'()", Tree("quote", [Tree("list", [])])),
        (
            "`(nil ~'() ~@'())",
            Tree(
                "quasiquote",
                [
                    Tree(
                        "list",
                        [
                            Symbol("nil"),
                            Tree(
                                "unquote",
                                [
                                    Tree(
                                        "quote",
                                        [
                                            Tree("list", []),
                                        ],
                                    ),
                                ],
                            ),
                            Tree(
                                "unquote_splicing",
                                [
                                    Tree(
                                        "quote",
                                        [
                                            Tree("list", []),
                                        ],
                                    ),
                                ],
                            ),
                        ],
                    ),
                ],
            ),
        ),
        (r"/foo\S+/", Tree("pattern", [r"/foo\S+/"])),
    ],
)
def test_examples(input, val):
    assert slurp(input, start="expr") == val