describe("db", function()
    local db

    before_each(function()
        db = require("db")
    end)

    describe("config", function()
        it("has required connection fields", function()
            assert.is_table(db.config)
            assert.is_string(db.config.host)
            assert.is_string(db.config.port)
            assert.is_string(db.config.database)
            assert.is_string(db.config.user)
            assert.is_string(db.config.password)
        end)
    end)

    describe("with_retry", function()
        it("returns result when function succeeds immediately", function()
            local result, err = db.with_retry(function()
                return "ok"
            end)
            assert.are.equal("ok", result)
            assert.is_nil(err)
        end)

        it("returns nil, err when function fails with non-retryable error", function()
            local result, err = db.with_retry(function()
                return nil, "validation failed"
            end)
            assert.is_nil(result)
            assert.are.equal("validation failed", err)
        end)
    end)
end)