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我有一个应用程序,我使用标准内置模拟服务器UI5运行它以进行测试。UI5

以下是 mockserver.js 中Web IDE自动生成的代码:

sap.ui.define([
"sap/ui/core/util/MockServer",
"sap/ui/model/json/JSONModel",
"sap/base/util/UriParameters",
"sap/base/Log"
], function (MockServer, JSONModel, UriParameters, Log) {
"use strict";

var oMockServer,
    _sAppPath = "de/cimt/test/",
    _sJsonFilesPath = _sAppPath + "localService/mockdata";

var oMockServerInterface = {

    /**
     * Initializes the mock server asynchronously.
     * You can configure the delay with the URL parameter "serverDelay".
     * The local mock data in this folder is returned instead of the real data for testing.
     * @protected
     * @param {object} [oOptionsParameter] init parameters for the mockserver
     * @returns{Promise} a promise that is resolved when the mock server has been started
     */
    init : function (oOptionsParameter) {
        var oOptions = oOptionsParameter || {};

        return new Promise(function(fnResolve, fnReject) {
            var sManifestUrl = sap.ui.require.toUrl(_sAppPath + "manifest.json"),
                oManifestModel = new JSONModel(sManifestUrl);

            oManifestModel.attachRequestCompleted(function ()  {
                var oUriParameters = new UriParameters(window.location.href),
                    // parse manifest for local metatadata URI
                    sJsonFilesUrl = sap.ui.require.toUrl(_sJsonFilesPath),
                    oMainDataSource = oManifestModel.getProperty("/sap.app/dataSources/mainService"),
                    sMetadataUrl = sap.ui.require.toUrl(_sAppPath + oMainDataSource.settings.localUri),
                    // ensure there is a trailing slash
                    sMockServerUrl = /.*\/$/.test(oMainDataSource.uri) ? oMainDataSource.uri : oMainDataSource.uri + "/";
                    // ensure the URL to be relative to the application
                    sMockServerUrl = sMockServerUrl && new URI(sMockServerUrl).absoluteTo(sap.ui.require.toUrl(_sAppPath)).toString();

                // create a mock server instance or stop the existing one to reinitialize
                if (!oMockServer) {
                    oMockServer = new MockServer({
                        rootUri: sMockServerUrl
                    });
                } else {
                    oMockServer.stop();
                }

                // configure mock server with the given options or a default delay of 0.5s
                MockServer.config({
                    autoRespond : true,
                    autoRespondAfter : (oOptions.delay || oUriParameters.get("serverDelay") || 500)
                });

                // simulate all requests using mock data
                oMockServer.simulate(sMetadataUrl, {
                    sMockdataBaseUrl : sJsonFilesUrl,
                    bGenerateMissingMockData : true
                });

                var aRequests = oMockServer.getRequests();

                // compose an error response for each request
                var fnResponse = function (iErrCode, sMessage, aRequest) {
                    aRequest.response = function(oXhr){
                        oXhr.respond(iErrCode, {"Content-Type": "text/plain;charset=utf-8"}, sMessage);
                    };
                };

                // simulate metadata errors
                if (oOptions.metadataError || oUriParameters.get("metadataError")) {
                    aRequests.forEach(function (aEntry) {
                        if (aEntry.path.toString().indexOf("$metadata") > -1) {
                            fnResponse(500, "metadata Error", aEntry);
                        }
                    });
                }

                // simulate request errors
                var sErrorParam = oOptions.errorType || oUriParameters.get("errorType"),
                    iErrorCode = sErrorParam === "badRequest" ? 400 : 500;
                if (sErrorParam) {
                    aRequests.forEach(function (aEntry) {
                        fnResponse(iErrorCode, sErrorParam, aEntry);
                    });
                }

                // custom mock behaviour may be added here

                // set requests and start the server
                oMockServer.setRequests(aRequests);
                oMockServer.start();

                Log.info("Running the app with mock data");
                fnResolve();
            });

            oManifestModel.attachRequestFailed(function () {
                var sError = "Failed to load application manifest";

                Log.error(sError);
                fnReject(new Error(sError));
            });
        });
    },

    /**
     * @public returns the mockserver of the app, should be used in integration tests
     * @returns {sap.ui.core.util.MockServer} the mockserver instance
     */
    getMockServer : function () {
        return oMockServer;
    }
};

return oMockServerInterface;
});

我的 oData 元数据中的所有集合都具有ID整数类型!(在真实网关服务器中自动增量)

有趣的是,当我创建一个集合的新对象时,它将分配9为第一次创建的对象的 id,第二个创建的对象将是416等等。

很明显,内置模拟服务器使用随机生成算法,不带或带静态种子。这就是它会为我的元数据模型中的每个集合始终生成相同的 id 链的原因。

现在我的问题是如何改变 UI5 模拟服务器的这种行为?

换句话说,如何将随机数设置为模拟服务器的种子,或者如何强制它对 id 使用增量行为。

作为 id生成的 UI5 的默认行为的问题9, 416, 6671, 2631, ...是,其中一个集合已经有一个带有 id 的项目9!然后通过创建一个新项目,我将在我的列表中有两个具有相同 ID(即 9)的项目!

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1 回答 1

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查看 UI5 模拟服务器的源代码,似乎没有随机种子的公共设置器。

如果要模拟顺序 ID 的生成,可以在模拟服务器处理完请求后使用MockServer#attachAfter()更改生成的值,如下所示:

oMockServer.attachAfter("POST", oEvent => {
    oEvent.getParameter("oEntity").Id = generateId()
}, "<your entity set name>")

如果您需要完全控制模拟服务器如何响应请求,您还可以覆盖每个请求的行为

于 2020-03-11T08:40:58.500 回答