source/projects/lilith/test/python/test_parser.py

"""tests covering the Lilith parser."""

from lilith.parser import Apply, Args, Block, GRAMMAR, parse_buffer, parser_with_transformer, Symbol

import pytest


@pytest.mark.parametrize('example, expected', [
    ("1", [1]),
    ("1, 2", [1, 2]),
    ("1, 2, 3", [1, 2, 3]),
])
def test_parse_args(args_grammar, example, expected):
    assert args_grammar.parse(example) == expected


@pytest.mark.parametrize('example, expected', [
    ("foo: bar", {Symbol("foo"): Symbol("bar")}),
    ("foo: bar, baz: qux", {Symbol("foo"): Symbol("bar"), Symbol("baz"): Symbol("qux")}),
])
def test_parse_kwargs(kwargs_grammar, example, expected):
    assert kwargs_grammar.parse(example) == expected


@pytest.mark.parametrize('example, expected', [
    ("1", ([1], {})),
    ("1, 2", ([1, 2], {})),
    ("1, 2, 3", ([1, 2, 3], {})),
    ("foo: bar",
     ([], {Symbol("foo"): Symbol("bar")})),
    ("foo: bar, baz: qux",
     ([], {Symbol("foo"): Symbol("bar"),
           Symbol("baz"): Symbol("qux")})),
    ("1; foo: bar, baz: qux",
     ([1], {Symbol("foo"): Symbol("bar"),
            Symbol("baz"): Symbol("qux")})),
])
def test_parse_arguments(arguments_grammar, example, expected):
    assert arguments_grammar.parse(example) == expected


@pytest.mark.parametrize('example, expected', [
    ('!def[syntax]',
     Block(Apply(Symbol('def'), Args(['syntax'], {})), [])),
    ('!frag[lang: md]',
     Block(Apply(Symbol('frag'), Args([], {'lang': 'md'})), [])),
    ('!frag[foo; lang: md]',
     Block(Apply(Symbol('frag'), Args(['foo'], {'lang': 'md'})), [])),
    ("!int.add[1, 2]",
     Block(Apply(Symbol('int.add'), Args([1, 2], {})), [])),
])
def test_parse_header(header_grammar, example, expected):
    assert header_grammar.parse(example) == expected


@pytest.mark.parametrize('example, expected', [
    ("!frag[lang: md]",
     [Block(Apply(Symbol('frag'), Args([], {Symbol("lang"): Symbol("md")})), [])]),
    ("""!frag[lang: md]\nHello, world!\n\n""",
     [Block(Apply(Symbol('frag'), Args([], {Symbol("lang"): Symbol("md")})), ["Hello, world!", ""])]),
    ("""!frag[lang: md]\nHello, world!\n\n!def[bar]""",
     [Block(Apply(Symbol('frag'), Args([], {Symbol("lang"): Symbol("md")})), ["Hello, world!", ""]),
      Block(Apply(Symbol('def'), Args([Symbol("bar")], {})), [])]),
])
def test_block_parser(example, expected):
    assert parse_buffer(example) == expected