Test Keycloak Integration (#130)

- Created comprehensive integration test suite for Keycloak
- Added test for valid token validation with real Keycloak tokens
- Implemented JWKS fetching and caching verification tests
- Added expired token rejection test
- Created invalid signature rejection test
- Implemented wrong issuer rejection test
- Added scope validation test with Keycloak tokens
- Created cache invalidation test for unknown key IDs
- Implemented concurrent token validation test
- Added token refresh scenario test
- Created audience validation test
- Added helper functions for Keycloak token acquisition
- Implemented Keycloak availability check with graceful skip
- Created test runner script with environment configuration
- Added CMake configuration for test compilation

Author: RahulHere

tests/CMakeLists.txt

@@ -10,6 +10,7 @@ add_executable(benchmark_jwt_validation auth/benchmark_jwt_validation.cc)
 add_executable(test_memory_cache auth/test_memory_cache.cc)
 add_executable(test_http_client auth/test_http_client.cc)
 add_executable(test_jwks_client auth/test_jwks_client.cc)
+add_executable(test_keycloak_integration auth/test_keycloak_integration.cc)
 add_executable(test_variant core/test_variant.cc)
 add_executable(test_variant_extensive core/test_variant_extensive.cc)
 add_executable(test_variant_advanced core/test_variant_advanced.cc)
@@ -179,6 +180,14 @@ target_link_libraries(test_jwks_client
     Threads::Threads
 )
 
+target_link_libraries(test_keycloak_integration
+    gopher_mcp_c
+    gtest 
+    gtest_main
+    Threads::Threads
+    CURL::libcurl
+)
+
 target_link_libraries(test_variant 
     gtest 
     gtest_main

tests/auth/run_keycloak_tests.sh

@@ -0,0 +1,86 @@
+#!/bin/bash
+# Script to run Keycloak integration tests
+
+# Configuration
+KEYCLOAK_URL=${KEYCLOAK_URL:-"http://localhost:8080"}
+KEYCLOAK_REALM=${KEYCLOAK_REALM:-"master"}
+KEYCLOAK_CLIENT_ID=${KEYCLOAK_CLIENT_ID:-"test-client"}
+KEYCLOAK_CLIENT_SECRET=${KEYCLOAK_CLIENT_SECRET:-"test-secret"}
+KEYCLOAK_USERNAME=${KEYCLOAK_USERNAME:-"test-user"}
+KEYCLOAK_PASSWORD=${KEYCLOAK_PASSWORD:-"test-password"}
+
+# Colors for output
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+NC='\033[0m' # No Color
+
+echo "========================================="
+echo "Keycloak Integration Test Runner"
+echo "========================================="
+echo ""
+echo "Configuration:"
+echo "  Keycloak URL: $KEYCLOAK_URL"
+echo "  Realm: $KEYCLOAK_REALM"
+echo "  Client ID: $KEYCLOAK_CLIENT_ID"
+echo ""
+
+# Check if Keycloak is running
+echo -n "Checking Keycloak availability... "
+if curl -s -o /dev/null -w "%{http_code}" "$KEYCLOAK_URL/health" | grep -q "200\|404"; then
+    echo -e "${GREEN}Available${NC}"
+else
+    echo -e "${RED}Not available${NC}"
+    echo ""
+    echo -e "${YELLOW}Keycloak appears to be unavailable at $KEYCLOAK_URL${NC}"
+    echo "To run these tests, you need a running Keycloak instance."
+    echo ""
+    echo "You can start a local Keycloak using Docker:"
+    echo "  docker run -d --name keycloak -p 8080:8080 \\"
+    echo "    -e KEYCLOAK_ADMIN=admin \\"
+    echo "    -e KEYCLOAK_ADMIN_PASSWORD=admin \\"
+    echo "    quay.io/keycloak/keycloak:latest start-dev"
+    echo ""
+    echo "Then create a test client and user in the Keycloak admin console."
+    echo ""
+    echo "Tests will be skipped."
+    exit 0
+fi
+
+# Run the tests
+echo ""
+echo "Running integration tests..."
+echo "========================================="
+
+# Export environment variables
+export KEYCLOAK_URL
+export KEYCLOAK_REALM
+export KEYCLOAK_CLIENT_ID
+export KEYCLOAK_CLIENT_SECRET
+export KEYCLOAK_USERNAME
+export KEYCLOAK_PASSWORD
+
+# Run test executable
+TEST_BINARY="../../build/tests/test_keycloak_integration"
+
+if [ ! -f "$TEST_BINARY" ]; then
+    echo -e "${RED}Test binary not found at $TEST_BINARY${NC}"
+    echo "Please build the tests first:"
+    echo "  cd ../../build && make test_keycloak_integration"
+    exit 1
+fi
+
+# Run with verbose output
+$TEST_BINARY --gtest_color=yes
+
+TEST_RESULT=$?
+
+echo ""
+echo "========================================="
+if [ $TEST_RESULT -eq 0 ]; then
+    echo -e "${GREEN}All tests passed!${NC}"
+else
+    echo -e "${RED}Some tests failed!${NC}"
+fi
+
+exit $TEST_RESULT