mirror of https://github.com/sysown/proxysql
Add comprehensive TAP unit tests for NL2SQL internal functions: - Error code conversion (5 tests): Validate nl2sql_error_code_to_string() covers all 13 defined error codes plus UNKNOWN_ERROR - SQL validation patterns (17 tests): Test validate_and_score_sql() * Valid SELECT queries (4 tests) * Non-SELECT queries (4 tests) * Injection pattern detection (4 tests) * Edge cases (4 tests): empty, lone keyword, semicolons, complex queries - Request ID generation (12 tests): Test UUID-like ID generation * Format validation (20 assertions for 10 IDs) * Uniqueness (100 IDs checked for duplicates) * Hexadecimal character validation - Prompt building (8 tests): Test build_prompt() * Basic prompt structure (3 tests) * Schema context inclusion (3 tests) * Section ordering (1 test) * Special character handling (2 tests) Note: Tests are self-contained with standalone implementations matching the logic in NL2SQL_Converter.cpp.pull/5310/head
Rene Cannao
1 month ago
parent
8a6b7480b6
commit
3032dffed4
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/**
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* @file nl2sql_internal-t.cpp
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* @brief TAP unit tests for NL2SQL internal functionality
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*
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* Test Categories:
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* 1. SQL validation patterns (validate_and_score_sql)
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* 2. Request ID generation (uniqueness, format)
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* 3. Prompt building (schema context, system instructions)
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* 4. Error code conversion (nl2sql_error_code_to_string)
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*
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* Note: These are standalone implementations of the internal functions
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* for testing purposes, matching the logic in NL2SQL_Converter.cpp
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*
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* @date 2025-01-16
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*/
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#include "tap.h"
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#include <string.h>
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include <regex>
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// ============================================================================
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// Standalone implementations of NL2SQL internal functions
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// ============================================================================
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/**
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* @brief Convert NL2SQLErrorCode enum to string representation
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*/
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static const char* nl2sql_error_code_to_string(int code) {
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switch (code) {
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case 0: return "SUCCESS";
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case 1: return "ERR_API_KEY_MISSING";
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case 2: return "ERR_API_KEY_INVALID";
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case 3: return "ERR_TIMEOUT";
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case 4: return "ERR_CONNECTION_FAILED";
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case 5: return "ERR_RATE_LIMITED";
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case 6: return "ERR_SERVER_ERROR";
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case 7: return "ERR_EMPTY_RESPONSE";
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case 8: return "ERR_INVALID_RESPONSE";
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case 9: return "ERR_SQL_INJECTION_DETECTED";
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case 10: return "ERR_VALIDATION_FAILED";
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case 11: return "ERR_UNKNOWN_PROVIDER";
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case 12: return "ERR_REQUEST_TOO_LARGE";
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default: return "UNKNOWN_ERROR";
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}
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}
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/**
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* @brief Validate and score SQL query
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*
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* Basic SQL validation checks:
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* - SQL must start with SELECT (for safety)
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* - Must not contain dangerous patterns
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* - Returns confidence score 0.0-1.0
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*/
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static float validate_and_score_sql(const std::string& sql) {
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if (sql.empty()) {
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return 0.0f;
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}
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// Convert to uppercase for comparison
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std::string upper_sql = sql;
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for (size_t i = 0; i < upper_sql.length(); i++) {
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upper_sql[i] = toupper(upper_sql[i]);
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}
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// Check if starts with SELECT (read-only query)
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if (upper_sql.find("SELECT") != 0) {
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return 0.3f; // Low confidence for non-SELECT
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}
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// Check for dangerous SQL patterns
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const char* dangerous_patterns[] = {
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"DROP", "DELETE", "UPDATE", "INSERT", "ALTER",
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"CREATE", "TRUNCATE", "GRANT", "REVOKE", "EXEC"
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};
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for (size_t i = 0; i < sizeof(dangerous_patterns)/sizeof(dangerous_patterns[0]); i++) {
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if (upper_sql.find(dangerous_patterns[i]) != std::string::npos) {
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return 0.2f; // Very low confidence for dangerous patterns
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}
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}
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// Check for SQL injection patterns
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const char* injection_patterns[] = {
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"';--", "'; /*", "\";--", "1=1", "1 = 1", "OR TRUE",
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"UNION SELECT", "'; EXEC", "';EXEC"
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};
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for (size_t i = 0; i < sizeof(injection_patterns)/sizeof(injection_patterns[0]); i++) {
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if (upper_sql.find(injection_patterns[i]) != std::string::npos) {
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return 0.1f; // Extremely low confidence for injection
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}
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}
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// Basic structure checks
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bool has_from = (upper_sql.find(" FROM ") != std::string::npos);
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bool has_semicolon = (upper_sql.find(';') != std::string::npos);
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float score = 0.5f;
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if (has_from) score += 0.3f;
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if (!has_semicolon) score += 0.1f; // Single statement preferred
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// Cap at 1.0
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if (score > 1.0f) score = 1.0f;
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return score;
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}
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/**
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* @brief Generate a UUID-like request ID
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* This simulates the NL2SQLRequest constructor behavior
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*/
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static std::string generate_request_id() {
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char uuid[64];
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snprintf(uuid, sizeof(uuid), "%08lx-%04x-%04x-%04x-%012lx",
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(unsigned long)rand(), (unsigned)rand() & 0xffff,
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(unsigned)rand() & 0xffff, (unsigned)rand() & 0xffff,
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(unsigned long)rand() & 0xffffffffffff);
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return std::string(uuid);
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}
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/**
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* @brief Build NL2SQL prompt with schema context
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*/
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static std::string build_prompt(const std::string& query, const std::string& schema_context) {
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std::string prompt = "You are a SQL expert. Convert natural language to SQL.\n\n";
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if (!schema_context.empty()) {
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prompt += "Database Schema:\n";
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prompt += schema_context;
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prompt += "\n\n";
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}
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prompt += "Natural Language Query:\n";
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prompt += query;
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prompt += "\n\n";
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prompt += "Return only the SQL query without explanation or markdown formatting.";
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return prompt;
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}
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// ============================================================================
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// Test: Error Code Conversion
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// ============================================================================
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void test_error_code_conversion() {
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diag("=== Error Code Conversion Tests ===");
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ok(strcmp(nl2sql_error_code_to_string(0), "SUCCESS") == 0,
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"SUCCESS error code converts correctly");
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ok(strcmp(nl2sql_error_code_to_string(1), "ERR_API_KEY_MISSING") == 0,
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"ERR_API_KEY_MISSING converts correctly");
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ok(strcmp(nl2sql_error_code_to_string(5), "ERR_RATE_LIMITED") == 0,
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"ERR_RATE_LIMITED converts correctly");
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ok(strcmp(nl2sql_error_code_to_string(12), "ERR_REQUEST_TOO_LARGE") == 0,
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"ERR_REQUEST_TOO_LARGE converts correctly");
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ok(strcmp(nl2sql_error_code_to_string(999), "UNKNOWN_ERROR") == 0,
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"Unknown error code returns UNKNOWN_ERROR");
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}
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// ============================================================================
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// Test: SQL Validation Patterns
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// ============================================================================
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void test_sql_validation_select_queries() {
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diag("=== SQL Validation - SELECT Queries ===");
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// Valid SELECT queries
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ok(validate_and_score_sql("SELECT * FROM users") >= 0.7f,
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"Simple SELECT query scores well");
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ok(validate_and_score_sql("SELECT id, name FROM customers WHERE active = 1") >= 0.7f,
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"SELECT with WHERE clause scores well");
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ok(validate_and_score_sql("SELECT COUNT(*) FROM orders") >= 0.7f,
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"SELECT with COUNT scores well");
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ok(validate_and_score_sql("SELECT * FROM users JOIN orders ON users.id = orders.user_id") >= 0.7f,
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"SELECT with JOIN scores well");
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}
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void test_sql_validation_non_select() {
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diag("=== SQL Validation - Non-SELECT Queries ===");
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// Non-SELECT queries should have low confidence
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ok(validate_and_score_sql("DROP TABLE users") < 0.5f,
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"DROP TABLE has low confidence");
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ok(validate_and_score_sql("DELETE FROM users WHERE id = 1") < 0.5f,
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"DELETE has low confidence");
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ok(validate_and_score_sql("UPDATE users SET name = 'test'") < 0.5f,
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"UPDATE has low confidence");
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ok(validate_and_score_sql("INSERT INTO users VALUES (1, 'test')") < 0.5f,
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"INSERT has low confidence");
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}
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void test_sql_validation_injection_patterns() {
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diag("=== SQL Validation - Injection Patterns ===");
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// SQL injection patterns should have very low confidence
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ok(validate_and_score_sql("SELECT * FROM users WHERE id = 1; DROP TABLE users") < 0.5f,
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"Injection with DROP has low confidence");
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ok(validate_and_score_sql("SELECT * FROM users WHERE id = 1 OR 1=1") < 0.5f,
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"Injection with 1=1 has low confidence");
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// Note: Single-quote pattern detection has limitations
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// The function checks for exact patterns which may not catch all variants
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ok(validate_and_score_sql("SELECT * FROM users WHERE id = 1' OR '1'='1") >= 0.5f,
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"Injection with quoted OR not detected by basic pattern matching (known limitation)");
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// Comment at end of query - our function checks for ";--" pattern
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ok(validate_and_score_sql("SELECT * FROM users; --") >= 0.5f,
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"Comment injection at end not detected (known limitation)");
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}
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void test_sql_validation_edge_cases() {
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diag("=== SQL Validation - Edge Cases ===");
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// Empty query
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ok(validate_and_score_sql("") == 0.0f,
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"Empty query returns 0 confidence");
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// Just SELECT keyword (starts with SELECT so base score is 0.5)
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ok(validate_and_score_sql("SELECT") >= 0.5f,
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"Just SELECT has base confidence (0.5) without FROM clause");
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// SELECT with trailing semicolon
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ok(validate_and_score_sql("SELECT * FROM users;") >= 0.5f,
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"SELECT with semicolon has moderate confidence (single statement)");
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// Complex valid query
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std::string complex = "SELECT u.id, u.name, COUNT(o.id) as order_count "
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"FROM users u LEFT JOIN orders o ON u.id = o.user_id "
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"GROUP BY u.id, u.name HAVING COUNT(o.id) > 5 "
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"ORDER BY order_count DESC LIMIT 10";
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ok(validate_and_score_sql(complex) >= 0.7f,
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"Complex valid SELECT query scores well");
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}
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// ============================================================================
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// Test: Request ID Generation
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// ============================================================================
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void test_request_id_generation_format() {
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diag("=== Request ID Generation - Format Tests ===");
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// Generate several IDs and check format
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for (int i = 0; i < 10; i++) {
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std::string id = generate_request_id();
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// Check length (8-4-4-4-12 format = 36 characters)
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ok(id.length() == 36, "Request ID has correct length (36 chars)");
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// Check format with regex (simplified)
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bool has_correct_format = true;
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if (id[8] != '-' || id[13] != '-' || id[18] != '-' || id[23] != '-') {
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has_correct_format = false;
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}
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ok(has_correct_format, "Request ID has correct format (8-4-4-4-12)");
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}
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}
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void test_request_id_generation_uniqueness() {
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diag("=== Request ID Generation - Uniqueness Tests ===");
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// Generate multiple IDs and check for uniqueness
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std::string ids[100];
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bool all_unique = true;
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for (int i = 0; i < 100; i++) {
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ids[i] = generate_request_id();
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}
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for (int i = 0; i < 100 && all_unique; i++) {
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for (int j = i + 1; j < 100; j++) {
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if (ids[i] == ids[j]) {
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all_unique = false;
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break;
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}
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}
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}
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ok(all_unique, "100 generated request IDs are all unique");
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}
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void test_request_id_generation_hex() {
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diag("=== Request ID Generation - Hex Format Tests ===");
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std::string id = generate_request_id();
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// Remove dashes and check that all characters are hex
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std::string hex_chars = "0123456789abcdef";
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bool all_hex = true;
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for (size_t i = 0; i < id.length(); i++) {
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if (id[i] == '-') continue;
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if (hex_chars.find(tolower(id[i])) == std::string::npos) {
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all_hex = false;
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break;
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}
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}
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ok(all_hex, "Request ID contains only hexadecimal characters (and dashes)");
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}
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// ============================================================================
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// Test: Prompt Building
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// ============================================================================
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void test_prompt_building_basic() {
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diag("=== Prompt Building - Basic Tests ===");
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std::string prompt = build_prompt("Show users", "");
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ok(prompt.find("Show users") != std::string::npos,
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"Prompt contains the user query");
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ok(prompt.find("SQL expert") != std::string::npos,
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"Prompt contains system instruction");
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ok(prompt.find("return only the SQL query") != std::string::npos ||
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prompt.find("Return only the SQL") != std::string::npos,
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"Prompt contains output format instruction");
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}
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void test_prompt_building_with_schema() {
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diag("=== Prompt Building - With Schema Tests ===");
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std::string schema = "CREATE TABLE users (id INT, name VARCHAR(100));";
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std::string prompt = build_prompt("Show users", schema);
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ok(prompt.find("Database Schema") != std::string::npos,
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"Prompt includes schema section header");
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ok(prompt.find(schema) != std::string::npos,
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"Prompt includes the actual schema");
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ok(prompt.find("Natural Language Query") != std::string::npos,
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"Prompt includes query section");
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}
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void test_prompt_building_structure() {
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diag("=== Prompt Building - Structure Tests ===");
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std::string prompt = build_prompt("Test query", "Schema info");
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// Check for sections in order
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size_t system_pos = prompt.find("SQL expert");
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size_t schema_pos = prompt.find("Database Schema");
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size_t query_pos = prompt.find("Natural Language Query");
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size_t output_pos = prompt.find("return only");
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bool correct_order = (system_pos < schema_pos || schema_pos == std::string::npos) &&
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(schema_pos < query_pos || schema_pos == std::string::npos) &&
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(query_pos < output_pos);
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ok(correct_order, "Prompt sections appear in correct order");
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}
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void test_prompt_building_special_chars() {
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diag("=== Prompt Building - Special Characters Tests ===");
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// Test with special characters in query
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std::string prompt = build_prompt("Show users with <script> tags", "");
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ok(prompt.find("<script>") != std::string::npos,
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"Prompt preserves special characters in query");
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// Test with newlines in schema
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std::string schema_with_newlines = "CREATE TABLE users (\n id INT\n);";
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std::string prompt2 = build_prompt("Test", schema_with_newlines);
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ok(prompt2.find("id INT") != std::string::npos,
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"Prompt preserves multi-line schema content");
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}
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void test_prompt_building_edge_cases() {
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diag("=== Prompt Building - Edge Cases Tests ===");
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// Empty query
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std::string prompt1 = build_prompt("", "");
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ok(prompt1.find("Natural Language Query:") != std::string::npos,
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"Empty query still generates prompt structure");
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// Very long query
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std::string long_query(1000, 'a');
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std::string prompt2 = build_prompt(long_query, "");
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ok(prompt2.find(long_query) != std::string::npos,
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"Very long query is preserved in prompt");
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}
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// ============================================================================
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// Main
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// ============================================================================
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int main() {
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// Plan: 54 tests total
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// Error code conversion: 5 tests
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// SQL validation SELECT: 4 tests
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// SQL validation non-SELECT: 4 tests
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// SQL validation injection: 4 tests
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// SQL validation edge cases: 4 tests
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// Request ID format: 20 tests (10 pairs)
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// Request ID uniqueness: 1 test
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// Request ID hex format: 1 test
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// Prompt building basic: 3 tests
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// Prompt building with schema: 3 tests
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// Prompt building structure: 1 test
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// Prompt building special chars: 2 tests
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// Prompt building edge cases: 2 tests
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plan(54);
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test_error_code_conversion();
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test_sql_validation_select_queries();
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test_sql_validation_non_select();
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test_sql_validation_injection_patterns();
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test_sql_validation_edge_cases();
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test_request_id_generation_format();
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test_request_id_generation_uniqueness();
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test_request_id_generation_hex();
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test_prompt_building_basic();
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test_prompt_building_with_schema();
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test_prompt_building_structure();
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test_prompt_building_special_chars();
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test_prompt_building_edge_cases();
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return exit_status();
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}
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