TestNoImports Class — flask Architecture

Architecture documentation for the TestNoImports class in test_helpers.py from the flask codebase.

Class python

Entity Profile

Dependency Diagram

graph TD
  cd18a2c8_818e_f563_8b1e_4d34a3accdce["TestNoImports"]
  d5d22f74_a243_4ea9_9dfe_aaec71d26288["test_helpers.py"]
  cd18a2c8_818e_f563_8b1e_4d34a3accdce -->|defined in| d5d22f74_a243_4ea9_9dfe_aaec71d26288
  6b99cb6e_b5dd_e28d_aa39_923b63c98d83["test_name_with_import_error()"]
  cd18a2c8_818e_f563_8b1e_4d34a3accdce -->|method| 6b99cb6e_b5dd_e28d_aa39_923b63c98d83

Relationship Graph

Source Code

tests/test_helpers.py lines 217–233

class TestNoImports:
    """Test Flasks are created without import.

    Avoiding ``__import__`` helps create Flask instances where there are errors
    at import time.  Those runtime errors will be apparent to the user soon
    enough, but tools which build Flask instances meta-programmatically benefit
    from a Flask which does not ``__import__``.  Instead of importing to
    retrieve file paths or metadata on a module or package, use the pkgutil and
    imp modules in the Python standard library.
    """

    def test_name_with_import_error(self, modules_tmp_path):
        (modules_tmp_path / "importerror.py").write_text("raise NotImplementedError()")
        try:
            flask.Flask("importerror")
        except NotImplementedError:
            AssertionError("Flask(import_name) is importing import_name.")

Defined In

tests/test_helpers.py

Source

View on GitHub

Frequently Asked Questions

What is the TestNoImports class?

TestNoImports is a class in the flask codebase, defined in tests/test_helpers.py.

Where is TestNoImports defined?

TestNoImports is defined in tests/test_helpers.py at line 217.

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