godot/modules/gdscript/tests/README.md

# GDScript integration tests

The `scripts/` folder contains integration tests in the form of GDScript files
and output files.

See the
[Integration tests for GDScript documentation](https://docs.godotengine.org/en/latest/contributing/development/core_and_modules/unit_testing.html#integration-tests-for-gdscript)
for information about creating and running GDScript integration tests.

# GDScript Autocompletion tests

The `script/completion` folder contains test for the GDScript autocompletion.

Each test case consists of at least one `.gd` file, which contains the code, and one `.cfg` file, which contains expected results and configuration. Inside of the GDScript file the character `➡` represents the cursor position, at which autocompletion is invoked.

The config file contains two section:

`[input]` contains keys that configure the test environment. The following keys are possible:

- `cs: boolean = false`: If `true`, the test will be skipped when running a non C# build.
- `use_single_quotes: boolean = false`: Configures the corresponding editor setting for the test.
- `scene: String`: Allows to specify a scene which is opened while autocompletion is performed. If this is not set the test runner will search for a `.tscn` file with the same basename as the GDScript file. If that isn't found either, autocompletion will behave as if no scene was opened.

`[output]` specifies the expected results for the test. The following key are supported:

- `include: Array`: An unordered list of suggestions that should be in the result. Each entry is one dictionary with the following keys: `display`, `insert_text`, `kind`, `location`, which correspond to the suggestion struct which is used in the code. The runner only tests against specified keys, so in most cases `display` will suffice.
- `exclude: Array`: An array of suggestions which should not be in the result. The entries take the same form as for `include`.
- `call_hint: String`: The expected call hint returned by autocompletion.
- `forced: boolean`: Whether autocompletion is expected to force opening a completion window.

Tests will only test against entries in `[output]` that were specified.

## Writing autocompletion tests

To avoid failing edge cases a certain behavior needs to be tested multiple times. Some things that tests should account for:

- All possible types: Test with all possible types that apply to the tested behavior. (For the last points testing against `SCRIPT` and `CLASS` should suffice. `CLASS` can be obtained through C#, `SCRIPT` through GDScript. Relying on autoloads to be of type `SCRIPT` is not good, since this might change in the future.)

  - `BUILTIN`
  - `NATIVE`
  - GDScripts (with `class_name` as well as `preload`ed)
  - C# (as standin for all other language bindings) (with `class_name` as well as `preload`ed)
  - Autoloads

- Possible contexts: the completion might be placed in different places of the program. e.g:
  - initializers of class members
  - directly inside a suite
  - assignments inside a suite
  - as parameter to a call