@4tw/vue-cli-plugin-cypress-django 中文文档教程
vue-cli-plugin-cypress-django
使用 cypress 和 django 进行集成测试。
Setup
yarn add --dev @4tw/vue-cli-plugin-cypress-django
Prerequisite
该插件需要 cypress 二进制文件。 https://www.npmjs.com/package/cypress
Usage
manage.py
该插件能够与 django 服务器和数据库进行交互。 因此,在执行测试时提供 djangopath 很重要。 djangopath 应该是项目的根目录。 该插件假设有一个 manage.py
来与 django 服务器交互。
database
需要在项目根目录下提供以下数据库脚本 所以插件可以正确地与数据库交互:
bin/e2e_setup_db
(create and fill database before tests are executed)bin/e2e_reload_db
(reset database for isolation)bin/e2e_teardown_db
(cleanup database)
脚本正在做什么取决于你,但他们应该实现的目标是 在上面的列表中描述。
数据库名称在执行期间作为第一个参数 $1
提供。
可以导入和创建数据库以与之交互。
const Database = require('@4tw/vue-cli-plugin-cypress-django/database');
const database = new Database({ djangopath, DJANGO_DATABASE_NAME });
database.reset()
重置数据库。
database.drop()
删除数据库。
database.load(dataset)
在测试期间加载数据。 dataset
是 django-fixture 的名称。
这些交互通常在 cypress 任务中完成:https://docs.cypress.io/api/commands/task.html#Syntax 因此可以在设置和拆卸挂钩中调用它们:
module.exports = (on, config) => {
on('task', {
djangoTestSetup({ test, gever }) {
database.reset();
},
loadData(dataSet) {
return database.load(dataSet);
},
});
return config;
};
django management commands
如果应在“每次测试”的基础上加载特定数据,则需要管理命令 load_e2e_data
。 该命令应接受一个可选参数:--datasets
。
该命令可以访问 BACKEND_PORT
(服务器当前运行的端口)。 示例:os.environ.get("BACKEND_PORT", 8000)
。
Interactive mode
交互模式使您能够在 cypress electron 应用程序中运行端到端测试。 这最适合开发,因为在更新生产或测试代码时您可以进行热重载。 测试完成后,您还可以与应用程序进行交互。
vue-cli-service test:django:e2e --djangopath=/path/to/django/root
Headless mode
headless 模式在后台运行测试。 这最适合在集成服务器上的管道中运行测试。
vue-cli-service test:django:e2e --djangopath=/path/to/django/root --headless
Specifying test files to run
如果您只想在无头模式下运行选定的测试文件而不是运行所有测试,请使用 --spec
指定文件的路径。 然后将其传递给赛普拉斯(参见 https://docs.cypress.io/guides/guides/command-line.html#cypress-run-spec-lt-spec-gt)。
vue-cli-service test:django:e2e --headless --spec=tests/e2e/specs/some.spec.js
Using a .env
file
您可以指定一种模式,该模式会加载相应的 .env.[mode]
文件,该文件允许您指定环境变量。
vue-cli-service test:django:e2e --djangopath=/path/to/django/root --mode testing_e2e
上面的示例将查找名为 .env.testing_e2e
的文件并获取此文件中指定的环境变量。
Without runserver
默认情况下,后端服务器使用 Django 的 python manage.py runserver
命令启动。
如果你想防止这种情况并针对已经运行的后端运行测试(例如开始使用 uwsgi),你可以设置 --runserver=false
。 在这种情况下,您需要使用环境变量 BACKEND_PORT
显式传递后端服务器的端口。
vue-cli-service test:django:e2e --djangopath=/path/to/django/root --runserver=false
Environment variables
可以使用以下(可选)环境变量:
DJANGO_E2E_DATABASE_NAME
: The name of the database used by django. Defaults toE2E_TESTING_34000
DJANGO_PYTHON_PATH
: The path to the python binary used by django. Defaults to'bin/python', '.tox/py36/bin/python', 'python'
DJANGO_CONFIGURATION
: The name of the django settings class. Defaults to'TestingE2E'
DJANGO_MEDIA_ROOT
: Optional: path to the django media root. Defaults tonull
.BACKEND_PORT
: The port used by django. Defaults to34000
FRONTEND_PORT
: The port used by vue. Defaults to35000
CYPRESS_PORT
: The port used by cypress. Defaults to36000
HEARTBEAT_PATH
: The frontend server will only start once the backend server is ready. A relative URL is requested repeatedly to check if the backend server is ready yet, using a HTTP HEAD method and waiting for a 200 or 302 status code. Defaults to/
CYPRESS_CONFIG
: Override Cypress options, passed as a string as--config
when running Cypress (https://docs.cypress.io/guides/references/configuration.html#Overriding-Options). Defaults to''
(baseUrl=http://localhost:[PORT2]
is always passed)
vue-cli-plugin-cypress-django
Integration testing with cypress and django.
Setup
yarn add --dev @4tw/vue-cli-plugin-cypress-django
Prerequisite
The plugin requires the cypress binary. https://www.npmjs.com/package/cypress
Usage
manage.py
The plugin is able to interact with the django server and database. Therefore it is important to provide the djangopath when executing the tests. The djangopath should be the root directory of your project. The plugin assumes to have a manage.py
to interact with the django server.
database
The following database scripts need to be provided in the project root so the plugin can properly interact with the database:
bin/e2e_setup_db
(create and fill database before tests are executed)bin/e2e_reload_db
(reset database for isolation)bin/e2e_teardown_db
(cleanup database)
What the script are doing is up to you but the goal they should achieve is described on the list above.
The databasename is provided during the execution as the first parameter $1
.
The database can be imported and created to interact with it.
const Database = require('@4tw/vue-cli-plugin-cypress-django/database');
const database = new Database({ djangopath, DJANGO_DATABASE_NAME });
database.reset()
Resets the database.
database.drop()
Drops the database.
database.load(dataset)
Loads data during the tests. dataset
is the name of the django-fixture.
Those interactions are usually done in cypress tasks: https://docs.cypress.io/api/commands/task.html#Syntax so they can be called in setup and teardown hooks:
module.exports = (on, config) => {
on('task', {
djangoTestSetup({ test, gever }) {
database.reset();
},
loadData(dataSet) {
return database.load(dataSet);
},
});
return config;
};
django management commands
The management command load_e2e_data
is required if specific data should be loaded on a 'per test' basis. The command should accept an optional parameter: --datasets
.
The command has access to the BACKEND_PORT
(the port on which the server is currently running). Example: os.environ.get("BACKEND_PORT", 8000)
.
Interactive mode
The interactive mode enables you to run the e2e tests in the cypress electron app. This is best for development because you have hot reload when the production or test code is updated. You are also able to interact with the application after the tests are done.
vue-cli-service test:django:e2e --djangopath=/path/to/django/root
Headless mode
The headless mode runs the tests in the background. This is best for running the tests in a pipeline on an integration server.
vue-cli-service test:django:e2e --djangopath=/path/to/django/root --headless
Specifying test files to run
If you want to run only selected test file(s) in headless mode instead of running all tests, specify the path of the file using --spec
. This is then passed to Cypress (see https://docs.cypress.io/guides/guides/command-line.html#cypress-run-spec-lt-spec-gt).
vue-cli-service test:django:e2e --headless --spec=tests/e2e/specs/some.spec.js
Using a .env
file
You may specify a mode, which loads a corresponding .env.[mode]
file that allows you to specify environment variables.
vue-cli-service test:django:e2e --djangopath=/path/to/django/root --mode testing_e2e
Above example will look for a file called .env.testing_e2e
and pick up the environment variables specified in this file.
Without runserver
By default, the backend server is started using Django's python manage.py runserver
command.
If you want to prevent this and run the tests against a backend which is already running (e.g. started using uwsgi), you can set --runserver=false
. In this case you need to explicitly pass the port of the backend server using the environment variable BACKEND_PORT
.
vue-cli-service test:django:e2e --djangopath=/path/to/django/root --runserver=false
Environment variables
Following (optional) environment variables can be made use of:
DJANGO_E2E_DATABASE_NAME
: The name of the database used by django. Defaults toE2E_TESTING_34000
DJANGO_PYTHON_PATH
: The path to the python binary used by django. Defaults to'bin/python', '.tox/py36/bin/python', 'python'
DJANGO_CONFIGURATION
: The name of the django settings class. Defaults to'TestingE2E'
DJANGO_MEDIA_ROOT
: Optional: path to the django media root. Defaults tonull
.BACKEND_PORT
: The port used by django. Defaults to34000
FRONTEND_PORT
: The port used by vue. Defaults to35000
CYPRESS_PORT
: The port used by cypress. Defaults to36000
HEARTBEAT_PATH
: The frontend server will only start once the backend server is ready. A relative URL is requested repeatedly to check if the backend server is ready yet, using a HTTP HEAD method and waiting for a 200 or 302 status code. Defaults to/
CYPRESS_CONFIG
: Override Cypress options, passed as a string as--config
when running Cypress (https://docs.cypress.io/guides/references/configuration.html#Overriding-Options). Defaults to''
(baseUrl=http://localhost:[PORT2]
is always passed)
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