This test makes sure that ty_test correctly parses the TOML configuration blocks and applies the correct settings hierarchically.

The following configuration will be attached to the root section (without any heading):

[environment]
python-version = "3.10"

Basic

Here, we simply make sure that we pick up the global configuration from the root section:

import sys

reveal_type(sys.version_info[:2] == (3, 10))  # revealed: Literal[True]

Inheritance

Child

Grandchild

The same should work for arbitrarily nested sections:

import sys

reveal_type(sys.version_info[:2] == (3, 10))  # revealed: Literal[True]

Overwriting

Here, we make sure that we can overwrite the global configuration in a child section:

[environment]
python-version = "3.11"

import sys

reveal_type(sys.version_info[:2] == (3, 11))  # revealed: Literal[True]

No global state

There is no global state. This section should again use the root configuration:

import sys

reveal_type(sys.version_info[:2] == (3, 10))  # revealed: Literal[True]

Overwriting affects children

Children in this section should all use the section configuration:

[environment]
python-version = "3.12"

Child

Grandchild

import sys

reveal_type(sys.version_info[:2] == (3, 12))  # revealed: Literal[True]