使用 Pytest、Selenium Grid 和 Docker 创建测试基础设施

Kos*_*ris 5 selenium pytest docker dockerfile docker-compose

基于这篇文章,我成功地创建了可扩展的 selenium 网格。然后我想使用 Pytest 在该网格中运行我的测试套件 [用 Python 编写]。

我是 Docker 的新手,并试图找到将我的测试过程迁移到微服务架构的最佳方法。本质上,我想让开发人员能够在他们的 PC 上本地设置完整的测试基础设施。

所以,我有 4 个Dockerfiles和 1个 docker-compose.yml

基础码头文件:

FROM ubuntu

ENV SEL_VERSION 2.44.0

# Update repos for Java
RUN apt-get update -qqy \
&& apt-get -qqy --no-install-recommends install \
software-properties-common \
&& rm -rf /var/lib/apt/lists/*
RUN add-apt-repository -y ppa:webupd8team/java

RUN echo debconf shared/accepted-oracle-license-v1-1 select true | debconf-set-selections
RUN echo debconf shared/accepted-oracle-license-v1-1 seen true | debconf-set-selections

# Install Java7
RUN apt-get update -qqy \
&& apt-get -qqy --no-install-recommends install \
oracle-java7-installer \
&& rm -rf /var/lib/apt/lists/*

# Download Selenium Server
RUN wget http://selenium-release.storage.googleapis.com/${SEL_VERSION%.*}/selenium-server-standalone-${SEL_VERSION}.jar
Run Code Online (Sandbox Code Playgroud)

HUB dockerfile :

FROM org/grid:base

EXPOSE 4444

# Add and set permissions to the script that will launch the hub
ADD register-hub.sh /var/register-hub.sh
RUN chmod 755 /var/register-hub.sh

# start a shell and run the script
#WORKDIR /
CMD ["/bin/bash", "/var/register-hub.sh"]
Run Code Online (Sandbox Code Playgroud)

节点 dockerfile :

FROM org/grid:base

# set the FF version to use
ENV FIREFOX_MINOR 34.0.5

# Update and install what's needed
RUN apt-get update -qqy \
&& apt-get -qqy --no-install-recommends install \
firefox \
xvfb \
bzip2 \
&& rm -rf /var/lib/apt/lists/*

# setup FF
RUN [ -e /usr/bin/firefox ] && rm /usr/bin/firefox
ADD https://ftp.mozilla.org/pub/mozilla.org/firefox/releases/${FIREFOX_MINOR}/linux-x86_64/en-US/firefox-${FIREFOX_MINOR}.tar.bz2 /tmp/
RUN apt-get install -q -y libdbus-glib-1-2
RUN tar -xvjf /tmp/firefox-${FIREFOX_MINOR}.tar.bz2 -C /opt/
RUN chmod -R +x /opt/firefox/
RUN ln -s /opt/firefox/firefox /usr/bin/firefox

# add and set permissions for the bash script to register the node
ADD register-node.sh /var/register-node.sh
RUN chmod 755 /var/register-node.sh

# start a shell and run the script
CMD ["/bin/bash", "/var/register-node.sh"]
Run Code Online (Sandbox Code Playgroud)

和 PYTEST dockerfile :

# Starting from base image
FROM ubuntu

# Set the Github personal token [to clone the QA code]
#todo------secret------
ENV GH_TOKEN some_token_some_token_some_token_

# Install Python & pip
RUN apt-get update
RUN apt-get upgrade -y
RUN apt-get install -y python python-pip python-dev && pip install --upgrade pip

# Install GIT
RUN apt-get update -y && apt-get install git -y

# [in the / folder] Create the folder and add the whole project from the repo to the container
RUN git clone https://$GH_TOKEN:x-oauth-basic@github.com/org/org_QA.git /org_QA_folder

# Install dependencies via pip
WORKDIR /org_QA_folder
RUN pip install -r dependencies.txt

#
CMD /bin/bash
Run Code Online (Sandbox Code Playgroud)

和 docker-compose 文件:

hub:
  image: org/grid:hub # image must already exist
  ports:
    - "4444:4444" # HOST:CONTAINER
  external_links: # link to a container created outside of this YAML file
    - pytest
  volumes_from:
    - pytest # must be created first

firefox:
  image: org/grid:nodeff # image must already exist
  links:
    - hub
  expose:
    - "5555" # grid console open to public
Run Code Online (Sandbox Code Playgroud)

所以......我不明白我应该如何运行“py.test /org_QA_folder/testcase.py”之类的东西并在网格上运行[本质上是节点]。

我首先使用 .pytest 容器运行 pytest 容器, docker run -dit -v /org_QA_folder --name pytest schoox/grid:py并使用docker-compose up -d.

我尝试了多种方法:

  1. 不使用 Pytest 容器,而是在集线器中克隆代码。但在这种情况下,HUB 容器运行网格的中心 [每个容器指令一个 CMD]。[编辑:我选择了 Docker 建议的微服务架构]

  2. 我让集线器和节点容器运行它们指定的服务,并创建一个单独的容器 [pytest] 从那里发送测试。但是测试不会运行,因为这个容器没有 xvfb。[编辑:我刚刚安装了 xvfb 并工作]

  3. 我尝试使用 pytest 容器作为集线器的卷,但仍然存在从已经运行服务的集线器容器运行测试的问题。[编辑:出于开发目的,我从 pytest 容器安装代码并使用其控制台来测试其他容器上的内容。之后我将使用pytest容器将代码分开]

我应该在其他容器中安装该节点容器具有的所有软件包吗?理想情况下,我想使用 pytest 容器控制台 [至少开发基础设施] 来运行将发送到集线器并运行到许多节点的测试。[编辑:我没有混入集线器和节点,我只是在 pytest 容器上安装了 xvfb]

你会建议怎么做?我错过了什么吗?

编辑[解决方案的步骤]:

我首先启动 pytest 容器 [ docker run -dit -v /org/org_QA_folder --name pytest org/grid:py] 然后我运行docker-compose up -d以启动网格

在我使用external_linksvolumes_from用于开发目的的撰写文件中。设置完成后,我不会在任何容器内工作。

我更改了 Pytest dockerfile 并添加了以下内容:

# Install xvfb [THAT WAS NEEDED!!!!!]
RUN apt-get install -y xvfb
Run Code Online (Sandbox Code Playgroud)

我从 pytest 容器内部运行我的一个测试,到我已经运行的 Grid[在 EC2 实例上] 作为概念证明并且工作正常。仍然需要将其发送到 dockerized 网格。

Kos*_*ris 1

我终于做到了这样的工作:

从我的代码中我使用这个:

class Fixtures_docker(unittest.TestCase):

    def setUp(self, hub_ip="http://HUB_CONTAINER_IP", hub_port=4444):
        print "--Fixtures_docker in config.py trying to run on--: %s:%s"%(hub_ip, hub_port)

        if platform.system() == 'Linux':
            from pyvirtualdisplay import Display

            self.display = Display(visible=0, size=(1024, 768))
            self.display.start()

        if browser == "Firefox": 
            self.wd = webdriver.Remote(
                command_executor=hub_ip + ':' + str(hub_port) + '/wd/hub',
                    desired_capabilities={
                        #FIREFOX
                        "browserName"   : "firefox",
                        # "maxInstances"  : 10,
                        "seleniumProtocol": "WebDriver",
                        "platform"      : "ANY",
                        "node"          : hub_port
                })

        # for debugging purposes from local machine
        elif browser == "Firefox" and os == "Windows":
            self.wd = webdriver.Remote(
                command_executor=hub_ip + ':' + str(hub_port) + '/wd/hub',
                    desired_capabilities={
                        # FIREFOX -> WINDOWS
                        # "firefox_binary":"C:\\firefox3\Firefox3.exe", # path to find another version of ff
                        "browserName"   : "firefox",
                        #"version"      : "3.0b3", # trying to run a specific ff version
                        "platform"      : "WINDOWS",
                        "node"          : hub_port,
                        "maxSession"    : 5
                })

        self.wd.implicitly_wait(10)

    def tearDown(self):
        self.wd.quit()
        if platform.system() == 'Linux':
            self.display.stop()
Run Code Online (Sandbox Code Playgroud)

在 docker-compose.yml 中:

hub:
  image: org/grid:hub # image must already exist
  ports:
    - "8080:4444" # HOST:CONTAINER
  external_links: # link to a container created outside of this YAML file
    - pytest
  volumes_from:
    - pytest # must be created first
  expose:
    - "4444" # intercontainer communication [other containers with selenium server]

firefox:
  image: org/grid:nodeff # image must already exist
  links:
    - hub
  expose:
    - "5555" # intercontainer communication [node registers to hub]
Run Code Online (Sandbox Code Playgroud)