I’m still trying to figure out this Android unit testing madness and this time I was finally able to create a Robolectric project without any IDE. Now that I know the steps it doesn’t seem so hard, but it was a long process trying to gather all the information necessary to make this work.

The first thing we need is to create a folder inside our android project. I’ll call mine tests. This is going to be the folder where we will include everything related to our Robolectric tests. The next step is to create a build.xml file so we can build our project with ant:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
<!-- You can use any project name you want -->
<project name="MyTests" basedir="." default="main">
    <property name="src.dir" value="src" />
    <property name="bin.dir" value="bin" />
    <property name="libs.dir" value="libs" />
    <property name="classes.dir" value="${bin.dir}/classes" />
    <property name="jar.dir" value="${bin.dir}/jar" />
    <property environment="env" />

    <!-- I stole this from the build file that Android generates. This will help
   ant find the Android SDK if your ANDROID_HOME variable is set -->
    <condition property="sdk.dir" value="${env.ANDROID_HOME}">
        <isset property="env.ANDROID_HOME" />
    </condition>

    <!-- Your classpath needs to include the Android SDK, your libs folder and
   the classes folder for the project under test -->
    <path id="classpath">
        <fileset dir="${libs.dir}" includes="**/*.jar" />
        <fileset dir="${sdk.dir}" includes="**/*.jar" />
        <pathelement path="../bin/classes" />
    </path>

    <!-- This is the tests jar -->
    <path id="application" location="${jar.dir}/${ant.project.name}.jar" />

    <target name="clean">
        <delete dir="${bin.dir}" />
    </target>

    <!-- We will compile our tests the same way we would compile any other java project -->
    <target name="compile">
        <mkdir dir="${classes.dir}" />
        <!-- includeantruntime is included to silence a warning that ant displays if this
       is not set -->
        <javac includeantruntime="false" srcdir="${src.dir}"
               destdir="${classes.dir}" classpathref="classpath" />
        <!-- This is a little hack necessary so we can tell Robolectric where the
       AndroidManifest.xml file for our project lives. Robolectric will read this
       information from a file named org.robolectric.Config.properties that we
       need to have in our classes folder before we package our tests -->
        <copy file="conf/org.robolectric.Config.properties"
               tofile="${classes.dir}/org.robolectric.Config.properties" />
    </target>

    <!-- Create a jar file from all our .class files -->
    <target name="jar" depends="compile">
        <mkdir dir="${jar.dir}" />
        <jar destfile="${jar.dir}/${ant.project.name}.jar" basedir="${classes.dir}" />
    </target>

    <!-- This will run the tests -->
    <target name="test" depends="jar">
        <junit>
            <!-- This will show the test errors in the console -->
            <formatter type="plain" usefile="false" />
            <!-- We include the classpath necessary to compile our tests plus the
           generated jar file -->
            <classpath>
                <path refid="classpath" />
                <path refid="application" />
            </classpath>
            <!-- Select which files will be ran (All the files ending with Test.java) -->
            <batchtest fork="yes">
                <fileset dir="${src.dir}">
                    <include name="**/*Test.java" />
                </fileset>
            </batchtest>
        </junit>
    </target>
</project>

You will also need to create this file conf/org.robolectric.Config.properties so Robolectric knows where your manifest file is:

1
manifest=../AndroidManifest.xml

Then you will need to download the libs you will need for your tests. The ones I currently have in my folder are:

  • hamcrest-core-1.3.jar
  • junit-4.11.jar
  • mockito-all-1.9.5.jar
  • robolectric-2.2-jar-with-dependencies.jar

Now you can write your tests and run them using:

1
ant test
[ android  ant  automation  java  mobile  productivity  testing  ]
Android development with Docker android automation mobile productivity
Getting familiar with Terraform automation productivity
Taking over existing instances with Terraform automation productivity
Terraform automation productivity
Autotools automation productivity