eth-rpc-proxy/nginx-proxy/lua_tests/cache/cache_test.lua

-- Minimal cache_test.lua for go-proxy-cache integration
-- Tests basic functionality without complex mocking

describe("cache.lua integration with go-proxy-cache", function()
  local cache
  local chain, network, request_body, response_body
  
  before_each(function()
    chain = "ethereum"
    network = "mainnet"
    request_body = '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}'
    response_body = '{"jsonrpc":"2.0","result":"0x123456","id":1}'
    
    -- Mock environment
    _G.os = _G.os or {}
    _G.os.getenv = function(var)
      if var == "GO_CACHE_SOCKET" then
        return "/tmp/cache.sock"
      end
      return nil
    end
    
    cache = require("cache.cache")
  end)

  describe("basic functionality", function()
    it("should have check_cache function", function()
      assert.is_function(cache.check_cache)
    end)

    it("should have save_to_cache function", function()
      assert.is_function(cache.save_to_cache)
    end)

    it("should handle invalid JSON body gracefully", function()
      local result = cache.check_cache(chain, network, "invalid json")
      assert.is_table(result)
      assert.are.equal(chain, result.chain)
      assert.are.equal(network, result.network)
    end)

    it("should not save when cache_type is nil (BYPASS)", function()
      local cache_info = {
        cache_key = "test_key",
        raw_body = request_body,
        cache_type = nil, -- BYPASS case
        chain = chain,
        network = network
      }
      
      local result = cache.save_to_cache(cache_info, response_body)
      assert.is_false(result)
    end)

    it("should handle missing cache info gracefully", function()
      local invalid_cache_info = {}
      local result = cache.save_to_cache(invalid_cache_info, response_body)
      assert.is_false(result)
    end)
  end)

  describe("diagnostic functions", function()
    it("should provide reset_cache_instances function", function()
      assert.is_function(cache.reset_cache_instances)
      -- Should not crash when called
      cache.reset_cache_instances()
    end)

    it("should provide run_diagnostics function", function()
      assert.is_function(cache.run_diagnostics)
      -- Should not crash when called
      cache.run_diagnostics()
    end)
  end)
end)