README updates + add click to test requirements

Author: shaypal5

README.rst

@@ -630,7 +630,13 @@ To test all cachier backends (MongoDB, Redis, SQL, Memory, Pickle) locally with
   # Keep containers running for debugging
   ./scripts/test-local.sh all -k
 
-The unified test script automatically manages Docker containers, installs required dependencies, and runs the appropriate test suites. See ``scripts/README-local-testing.md`` for detailed documentation.
+  # Test specific test files with selected backends
+  ./scripts/test-local.sh mongo -f tests/test_mongo_core.py
+
+  # Test multiple files across all backends
+  ./scripts/test-local.sh all -f tests/test_main.py -f tests/test_redis_core_coverage.py
+
+The unified test script automatically manages Docker containers, installs required dependencies, and runs the appropriate test suites. The ``-f`` / ``--files`` option allows you to run specific test files instead of the entire test suite. See ``scripts/README-local-testing.md`` for detailed documentation.
 
 
 Adding documentation

scripts/README-local-testing.md

@@ -40,6 +40,7 @@ This guide explains how to run cachier tests locally with Docker containers for
 - `-v, --verbose` - Show verbose pytest output
 - `-k, --keep-running` - Keep Docker containers running after tests
 - `-h, --html-coverage` - Generate HTML coverage report
+- `-f, --files` - Specify test files to run (can be used multiple times)
 - `--help` - Show help message
 
 ## Examples
@@ -86,6 +87,15 @@ make test-sql-local
 
 # Using environment variable
 CACHIER_TEST_CORES="mongo redis" ./scripts/test-local.sh
+
+# Test specific files with MongoDB backend
+./scripts/test-local.sh mongo -f tests/test_mongo_core.py
+
+# Test multiple files across all backends
+./scripts/test-local.sh all -f tests/test_main.py -f tests/test_redis_core_coverage.py
+
+# Combine file selection with other options
+./scripts/test-local.sh redis sql -f tests/test_sql_core.py -v -k
 ```
 
 ### Docker Compose

tests/requirements.txt

@@ -10,3 +10,5 @@ pygments
 # the memory core tests dataframe caching
 pandas
 pympler
+# for cli tests
+click