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added 3 tests to test_variables.py #660

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added 3 tests to test_variables.py #660

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28 changes: 27 additions & 1 deletion tests/test_variables.py
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Original file line number Diff line number Diff line change
@@ -1,6 +1,9 @@
import pytest
import tempfile
import os

from dotenv.variables import Literal, Variable, parse_variables
from dotenv import dotenv_values


@pytest.mark.parametrize(
Expand Down Expand Up @@ -31,5 +34,28 @@
)
def test_parse_variables(value, expected):
result = parse_variables(value)

assert list(result) == expected

def test_variables_simple_interpolation():
with tempfile.NamedTemporaryFile(mode='w+', delete=False) as f:
f.write('BASE=base\nFOO=${BASE}/bar\n')
f.flush()
values = dotenv_values(f.name)
assert values == {'BASE': 'base', 'FOO': 'base/bar'}
os.remove(f.name)

def test_variables_with_default():
with tempfile.NamedTemporaryFile(mode='w+', delete=False) as f:
f.write('FOO=${BAR:-default}\n')
f.flush()
values = dotenv_values(f.name)
assert values == {'FOO': 'default'}
os.remove(f.name)

def test_variables_escape():
with tempfile.NamedTemporaryFile(mode='w+', delete=False) as f:
f.write('FOO=$${BAR}\n')
f.flush()
values = dotenv_values(f.name)
assert values == {'FOO': '$'}
os.remove(f.name)
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