Add minimal CI setup, adjust readme, add a test

.github/workflows/tests.yml

@@ -0,0 +1,30 @@
+name: Tests
+
+on:
+  push:
+    branches: [ main, claude/* ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12']
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v5
+      with:
+        python-version: ${{ matrix.python-version }}
+
+    - name: Install package
+      run: |
+        python -m pip install --upgrade pip
+        pip install -e .
+
+    - name: Run tests
+      run: python -m unittest discover -s tests -p 'test*.py' -v

README.md

@@ -38,11 +38,20 @@ with open('output.nsv', 'w') as f:
     writer.write_row(['row2cell1', 'row2cell2', 'row2cell3'])
 ```
 
-## Running Tests
+## Development
+
+### Running Tests
+
+**Important**: Always run tests from the project root to test local code changes (not the installed package):
 
 ```bash
-cd tests
-python -m unittest
+python -m unittest discover -s tests -p 'test*.py' -v
+```
+
+Alternatively, install in editable mode:
+
+```bash
+pip install -e .
 ```
 
 Must cover

nsv/core.py

@@ -1,13 +1,13 @@
-from typing import Iterable
+from typing import Iterable, List
 
 from .reader import Reader
 from .writer import Writer
 
-def load(file_obj) -> list[list[str]]:
+def load(file_obj) -> List[List[str]]:
     """Load NSV data from a file-like object."""
     return list(Reader(file_obj))
 
-def loads(s: str) -> list[list[str]]:
+def loads(s: str) -> List[List[str]]:
     """Load NSV data from a string."""
     data = []
     row = []

tests/samples/escape_edge_cases.nsv

@@ -0,0 +1,7 @@
+\\n
+\\\n
+\\\\n
+
+\\\\
+\n\n
+

tests/samples/trailing_backslash.nsv

@@ -0,0 +1,13 @@
+yo\
+shouln'ta\
+be\
+doing\
+this\
+
+\
+or
+\
+should
+\
+ya
+

tests/test_edge_cases.py

@@ -20,6 +20,17 @@ def test_special_characters(self):
             rows = nsv.load(f)
         self.assertEqual(SAMPLES_DATA['special_chars'], rows)
 
+    def test_trailing_backslash(self):
+        """Test handling of special characters in field values."""
+        expected = [
+            ['yo', 'shouln\'ta', 'be', 'doing', 'this'],
+            ['', 'or', '', 'should', '', 'ya'],
+        ]
+        file_path = os.path.join(SAMPLES_DIR, 'trailing_backslash.nsv')
+        with open(file_path, 'r') as f:
+            rows = nsv.load(f)
+        self.assertEqual(expected, rows)
+
     # def test_numeric_values(self):
     #     """Test handling of numeric values."""
     #     data = [

tests/test_utils.py

@@ -29,6 +29,10 @@
         [],
     ],
     'multiline_encoded': [["line1\nline2", "r1c2", "r1c3"], ["anotherline1\nline2\nline3", "r2c2"]],
+    'escape_edge_cases': [
+        ["\\n", "\\\n", "\\\\n"],
+        ["\\\\", "\n\n"],
+    ],
 }