Update test_parsers.py

Defined `test_search_query_with_field_aliases` method in `TestFileDataQueryParser`
class for testing file query parser with delete queries. Also defined attributes
comprising parameters and results for the same.

tests/test_query/test_handlers/test_parsers.py

@@ -197,6 +197,12 @@ class TestFileDataQueryParser:
         "* FROM '.' WHERE lineno BETWEEN (0, 100)",
     ]
 
+    search_query_with_field_aliases_test_params = [
+        "filename, data FROM .",
+        "filename, type, line FROM RELATIVE . WHERE type = '.py' AND line > 10",
+        "filename, filepath FROM ABSOLUTE . WHERE 'test' in data",
+    ]
+
     # The following are test results for the search query tests comprising sub-lists, each with
     # a variable length where the first element of each of them signifies whether the path is
     # absolute (True) or relative (False) whereas the last element in it is a list comprising
@@ -210,6 +216,12 @@ class TestFileDataQueryParser:
         [False, list(constants.DATA_FIELDS)],
     ]
 
+    search_query_with_field_aliases_test_results = [
+        [False, ["name", "dataline"], ["filename", "data"]],
+        [False, ["name", "filetype", "dataline"], ["filename", "type", "line"]],
+        [True, ["name", "path"], ["filename", "filepath"]],
+    ]
+
     @pytest.mark.parametrize(
         ("subquery", "results"),
         zip(search_query_test_params, search_query_test_results),
@@ -227,6 +239,26 @@ def test_search_query(self, subquery: str, results: list[Any]) -> None:
 
         assert [field.field for field in search_query.fields] == fields
 
+    @pytest.mark.parametrize(
+        ("subquery", "results"),
+        zip(
+            search_query_with_field_aliases_test_params,
+            search_query_with_field_aliases_test_results,
+        ),
+    )
+    def test_search_query(self, subquery: str, results: list[Any]) -> None:
+        """
+        Tests the file data query parser with search queries comprising field aliases.
+        """
+
+        query: list[str] = tools.parse_query(subquery)
+        parser = FileDataQueryParser(query)
+
+        search_query: SearchQuery = examine_search_query(parser, results)
+        fields: list[str] = results[1]
+
+        assert [field.field for field in search_query.fields] == fields
+
 
 class TestDirectoryQueryParser:
     """Tests the DirectoryQueryParser class"""