Add script to validate test docstrings

Closes #46

Makefile

@@ -49,6 +49,7 @@ test-coverage:
 	py.test --verbose --cov-report term --cov=camayoc.cli --cov=camayoc.config --cov=camayoc.exceptions --cov=camayoc.utils tests
 
 validate-docstrings:
+	@./scripts/validate_docstrings.sh
 	@testimony --tokens $(TESTIMONY_TOKENS) --minimum-tokens $(TESTIMONY_MINIMUM_TOKENS) validate camayoc/tests
 
 .PHONY: all docs-clean docs-html install install-dev lint package \

scripts/validate_docstrings.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+DUPLICATED_IDS=$(
+    grep -r -i --include "*.py" :id: camayoc/tests | sort -k 2 | uniq -d -f 2)
+
+if [ "${DUPLICATED_IDS}" ]; then
+    echo "Found duplicated test case IDs:"
+    echo
+    echo -n "${DUPLICATED_IDS}"
+    echo
+    exit 1
+fi