def test_read_yaml_uses_cache(tmp_path):
"""Assert that read_yaml uses a cache"""
yaml_path = tmp_path / 'test.yaml'
yaml_path.write_text("""data:
- 1
- 2
- 3
""")
# We assert that cache is used by looking at lru_cache information from
# the internal function.
start_info = _read_yaml.cache_info()
first = read_yaml(tmp_path, 'test.yaml')
info = _read_yaml.cache_info()
assert info.hits == start_info.hits
assert info.misses == start_info.misses + 1
second = read_yaml(tmp_path, 'test.yaml')
info = _read_yaml.cache_info()
assert info.hits == start_info.hits + 1
assert info.misses == start_info.misses + 1
assert first == second
def test_read_yaml_disallow_duplicate_keys(tmp_path):
"""Assert that read_yaml disallows duplicate keys"""
yaml_path = tmp_path / 'test.yaml'
yaml_path.write_text("""data:
a: 1
a: 2
""")
with pytest.raises(yaml.constructor.ConstructorError):
read_yaml(tmp_path, 'test.yaml')
def test_read_yaml_break_cache(tmp_path):
"""Assert that read_yaml cache is invalidated when the file changes"""
yaml_path = tmp_path / 'test.yaml'
yaml_path.write_text("""data:
- 1
- 2
- 3
""")
assert read_yaml(tmp_path, 'test.yaml') == {'data': [1, 2, 3]}
yaml_path.write_text("changed: 1")
assert read_yaml(tmp_path, 'test.yaml') == {'changed': 1}
def test_isolated_load(tmp_path):
"""Assert changing the data returned from read_yaml won't poison the cache
by changing the data in place."""
yaml_path = tmp_path / 'test.yaml'
yaml_path.write_text("""data:
a: 1
b: 2
""")
data = read_yaml(tmp_path, 'test.yaml')
assert data == {'data': {'a': 1, 'b': 2}}
del data['data']['a']
data = read_yaml(tmp_path, 'test.yaml')
assert data == {'data': {'a': 1, 'b': 2}}
def test_read_yaml(tmp_path):
yaml_path = tmp_path / 'test.yaml'
yaml_path.write_text("""data:
- 1
- 2
- 3
""")
assert read_yaml(tmp_path, 'test.yaml') == {'data': [1, 2, 3]}
def test_read_yaml_allow_merge(tmp_path):
"""Assert that read_yaml allows overriding dict keys in YAML merge"""
yaml_path = tmp_path / 'test.yaml'
yaml_path.write_text("""data:
1:
<<: &common
a: a
b: b
a: override
2:
<<: *common
b: override
""")
data = read_yaml(tmp_path, 'test.yaml')
assert data == {
1: {
'a': 'override',
'b': 'b'
},
2: {
'a': 'a',
'b': 'override'
},
}
def test_read_yaml_disallow_parents(tmp_path):
"""Assert that read_yaml cache is invalidated when the file changes"""
with pytest.raises(ValueError):
read_yaml(tmp_path, '../../test.yaml')