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Contributing

Issues

Please read these guidelines before opening an issue. If you still need to open an issue then we ask that you complete the template as fully as possible.

Pull requests

We welcome pull requests, but ask contributors to keep in mind the following:

  • Only PRs with the template completed will be accepted
  • We will not accept PRs for user specific functionality

Developer Certificate of Origin

In order for us to accept pull-requests, the contributor must sign-off a Developer Certificate of Origin (DCO). This clarifies the intellectual property license granted with any contribution. It is for your protection as a Contributor as well as the protection of IBM and its customers; it does not change your rights to use your own Contributions for any other purpose.

Please read the agreement and acknowledge it by ticking the appropriate box in the PR text, for example:

  • Tick to sign-off your agreement to the Developer Certificate of Origin (DCO) 1.1

General information

Cloudant Sync - Android is written in Java and uses gradle as its build tool.

Coding guidelines

Adopting the Google Java Style with the following changes:

4.2
    Our block indent is +4 characters

4.4
    Our line length is 100 characters.

4.5.2
    Indent continuation of +4 characters fine, but I think
    IDEA defaults to 8, which is okay too.
    ```

## Requirements

The main requirements are:

* Java 1.6
* Android SDK

Optionally, and recommended:

* CouchDB

### Installing requirements

#### Java

Follow the instructions for your platform.


#### CouchDB

Again, using brew:

```bash
$ brew install couchdb

Android SDK

Follow the instructions provided on the android developer site.

Building

The project should build out of the box with:

$ ./gradlew build

Note: for windows machines the script to run is gradlew.bat.

This will download the dependencies, build the library and run the unit tests.

If you want to use the library in other projects, install it to your local maven repository:

$ gradlew install

Testing

Running integration tests

These require a running couchdb:

$ couchdb
Apache CouchDB 1.3.1 (LogLevel=info) is starting.
Apache CouchDB has started. Time to relax.
[info] [<0.31.0>] Apache CouchDB has started on http://127.0.0.1:5984/

And in another terminal:

$ ./gradlew integrationTest

Running integration tests on Android

Running the integration tests on Android requires running the tests from an Android context. For this there is a Test App in the AndroidTest directory. The test app project will automatically pull in the source code from the sync-core and sync-android modules.

The test application build scripts require a running emulator and the ANDROID_HOME environment variable to be set

The minimum requirements for an Android emulator:

  • Minimum API Level 15 (Target API Level is 20)
  • An SD card

The tests can be run like any other Android application test suite, through Android Studio / IntelliJ Idea or via the command line.

You must run the uploadFixtures gradle task before running any tests.

Note: you can run the uploadFixtures task once per emulator if you don't add any test fixtures.

Steps to run the tests:

  1. Start Android emulator
  2. Run the following command from the root of the repo
$ cd AndroidTest
$ ../gradlew clean uploadFixtures connectedCheck

Collecting Test Results

Test Results are collected in the usual manner for Android tests. If run via Android Studio / IntelliJ IDEA the results will appear in the UI. If you run via the command line the test report will appear in the build/reports/ directory of the app module.

Testing using remote CouchDB Instance

Certain tests need a running CouchDB instance, by default they use the local CouchDB.

To run tests with a remote CouchDB, you need set the details of this CouchDB server, including access credentials. This can be done by adding options to a file named gradle.properties in the same folder as build.gradle, eg:

systemProp.test.couch.username=yourUsername
...

Consult the list of test options for details of all options available.

It is also possible to pass in these options from the gradle command line by using the -D switch eg. -Dtest.couch.username=yourUsername

Note: some tests need to be ignored based on the configuration of the CouchDB instance you are using or if you are running against Cloudant. For example if the compaction endpoint is unavailable eg., returns a 403 response, these tests should be disabled.

Your gradle.properties should NEVER be checked into git repo as it contains your CouchDB credentials.

Using IntelliJ IDEA / Android Studio

For IDEA, the best way to get everything set up correctly is to use IDEA's JetGradle plugin to automatically generate and configure an IDEA project. IDEA will then keep the project in sync with the build.gradle file.

Install this via Preferences -> Plugins (under IDE Settings) -> Gradle.

For Android Studio, this plugin is already installed.

You can then use File -> Import Project (Import Project or Import Non-Android Studio project from the Welcome dialog) to create the IDEA / Android Studio project, which will allow you to run gradle tasks from IDEA / Android Studio in addition to setting up dependencies correctly. Just select the build.gradle file from the root of the project directory in the Import dialog box and select the default settings.

In Android Studio, a message may appear showing 'Frameworks detected: Android framework is detected in the project'. This can be safely dismissed as the library should not be built against the Android framework - it is a standard Java SE project.

After importing the gradle project you may need to configure the correct SDK. This can be set from the File -> Project Structure dialog. In the Project Settings -> Project tab. If the selected entry in the Project SDK dropdown is <No SDK>, then change it to an appropriate Java SDK such as 1.6 or 1.7.

An alternative is to use gradle itself, which is also able to generate an idea project.

$ ./gradlew idea

See Gradle's IDEA plugin docs.

Code Style

An IDEA code style matching the guidelines above is included in the project, in the .idea folder.

If you already have the project, enable the code style follow these steps:

  1. Go to Preferences -> Editor -> Code Style.
  2. In the Scheme dropdown, select Project.

IDEA will then use the style when reformatting, refactoring and so on.

Running JUnit tests in the IDE

To run JUnit tests from Android Studio / IDEA, you will need to add some configuration to tell it where the SQLite native library lives.

  • In the menu, select Run -> Edit Configurations
  • In the left hand pane, select Defaults -> JUnit
  • Set VM options to:
-ea -Dsqlite4java.library.path=native

Test Options

Options which describe how to access the remote CouchDB/Cloudant server

test.couch.uri

If specified, tests will run against an instance described by this URI.

This will over-ride any of the other test.couch options given. This URI can include all of the components necessary including username and password for basic auth.

It is not necessary to set test.with.specified.couch to true in order to use this option.

test.with.specified.couch

If true, tests will run against an instance described by test.couch.username, test.couch.password, test.couch.host, test.couch.port, test.couch.http with default values supplied as appropriate.

If false, tests will run against a local couch instance on the default port over http.

test.couch.username

If specified, tests will use this username to access the instance with basic auth.

Alternatively, if test.couch.use.cookies is true, tests will use this username to refresh cookies.

test.couch.password

If specified, tests will use this password to access the instance with basic auth.

Alternatively, if test.couch.use.cookies is true, tests will use this password to refresh cookies.

test.couch.host

If specified, tests will use this hostname or IP address to access the instance.

Otherwise, a default value of "localhost" is used.

test.couch.port

If specified, tests will use this port to access the instance.

Otherwise, a default value of 5984 is used.

test.couch.http

If specified, tests will use this protocol to access the instance. Valid values are "http" and "https".

Otherwise, a default value of "http" is used.

test.couch.use.cookies

If true, use cookie authentication (via the HTTP interceptors) instead of basic authentication to access the instance.

Options which control whether we should ignore certain tests

test.couch.ignore.compaction

If true, do not run tests which expect a /_compact endpoint to exist. The Cloudant service does not expose this endpoint as compaction is performed automatically.

test.couch.ignore.auth.headers

If true, do not run tests like testCookieAuthWithoutRetry.