tests: add test_index.py

tests/test_index.py

@@ -0,0 +1,40 @@
+import qsv
+import pytest
+from pathlib import Path
+from .test_data import test_data
+
+
+class TestIndexFunc:
+    @pytest.mark.parametrize(
+        "file_name",
+        [("fruits.csv")],
+    )
+    def test_index(self, file_name, tmp_path: Path):
+        """Generate an index for a given file path at `filename.ext.idx` where `.ext` is the file's extension."""
+
+        # Make a temporary data file in a temporary directory
+        tmp_file = tmp_path.joinpath(file_name).resolve()
+        tmp_file.write_text(test_data[file_name].read_text(), encoding="utf-8")
+
+        qsv.index(tmp_file, run=True)
+        idx_file = tmp_path.joinpath(f"{file_name}.idx").resolve()
+
+        assert idx_file.exists()
+
+    @pytest.mark.parametrize(
+        "file_name",
+        [("fruits.csv")],
+    )
+    def test_output(self, file_name, tmp_path: Path):
+        """Generate an index for a given file path at a specified output path."""
+
+        # Make a temporary data file in a temporary directory
+        tmp_file = tmp_path.joinpath(file_name).resolve()
+        tmp_file.write_text(test_data[file_name].read_text(), encoding="utf-8")
+        output_file = tmp_path.joinpath(
+            f"arbitrary_path{''.join(test_data[file_name].suffixes)}.idx"
+        ).resolve()
+
+        qsv.index(tmp_file, output=output_file.as_posix(), run=True)
+
+        assert output_file.exists()