def test_iter(self, tmpfile):
f = File(tmpfile, 'w')
f.write_array('c', 10)
f.write_array('a', [1, 2, 3])
f.write_json('b', {'foo': 'bar'})
f.write_json('d', 42)
assert list(f) == ['a', 'b', 'c', 'd']
f.close()
f = File(tmpfile)
assert list(f) == ['a', 'b', 'c', 'd']
def test_invalid_key(self, tmpfile):
f = File(tmpfile, 'w')
pytest.raises_regexp(ValueError, 'invalid key: expected string',
f.write_json, 42, 0)
pytest.raises_regexp(ValueError, 'invalid key: empty string',
f.write_json, '', 0)
f.write_json('foo', 'bar')
pytest.raises_regexp(ValueError, "key already exists: 'foo'",
f.write_json, 'foo', 'baz')
f.close()
f = File(tmpfile)
pytest.raises_regexp(ValueError, 'invalid key: expected string',
f.read, 42)
pytest.raises_regexp(KeyError, 'bar',
f.read, 'bar')