# File Utilities Tests

## Overview
This Python file contains a set of tests for the `file_utils` module in the `sourcescribe-core` project. The tests cover the following key functionality:

- Reading and writing files
- Finding files based on patterns
- Detecting the programming language of a file
- Checking if a file is a text file

The tests use the `pytest` framework and the `tempfile` module to create temporary directories and files for testing purposes.

## Main Components

### Functions

1. `test_read_write_file()`:
   - Tests the `read_file()` and `write_file()` functions from the `file_utils` module.
   - Writes a test string to a temporary file, then reads the content back and asserts that it matches the original.

2. `test_find_files()`:
   - Tests the `find_files()` function from the `file_utils` module.
   - Creates a temporary directory with several test files, including Python and non-Python files.
   - Searches for Python files in the directory, excluding compiled Python files (`.pyc`), and asserts that the correct file is found.

3. `test_get_file_language()`:
   - Tests the `get_file_language()` function from the `file_utils` module.
   - Checks the detected programming language for various file extensions, including Python, JavaScript, Java, and Go.
   - Asserts that the function correctly identifies the language or returns "unknown" for an unsupported extension.

4. `test_is_text_file()`:
   - Tests the `is_text_file()` function from the `file_utils` module.
   - Creates a temporary directory with a text file and a binary file.
   - Checks that the `is_text_file()` function correctly identifies the text file as a text file and the binary file as not a text file.

## Dependencies and Imports

The file imports the following modules and functions:

- `pytest`: A testing framework for Python.
- `tempfile`: A module for creating temporary files and directories.
- `pathlib.Path`: A class for representing and working with file paths.
- `sourcescribe.utils.file_utils`: The `file_utils` module, which contains the functions being tested.

## Usage Examples

To run the tests in this file, you can use the `pytest` command in your terminal:

```
pytest test_file_utils.py
```

This will execute all the tests defined in the file and display the results.

## Implementation Details

The tests in this file use the `tempfile.TemporaryDirectory()` context manager to create temporary directories for testing file-related functionality. This ensures that the test files are isolated and do not interfere with the rest of the file system.

The `find_files()` function is tested by creating a temporary directory with various test files, including Python files and non-Python files. The test then checks that the function correctly identifies and returns the Python files, while excluding the compiled Python files (`.pyc`).

The `get_file_language()` function is tested by passing in various file extensions and asserting that the function correctly identifies the programming language or returns "unknown" for unsupported extensions.

The `is_text_file()` function is tested by creating a temporary directory with a text file and a binary file, then checking that the function correctly identifies the text file as a text file and the binary file as not a text file.

Overall, this test file ensures that the key file-related functionality in the `file_utils` module is working as expected.