What is marionette

1. A marionette is a puppet controlled from above using wires or strings depending on regional variations. (Wikipedia)
2. Marionette is the remote protocol that lets out-of-process programs communicate with, instrument, and control Gecko-based browsers. (Mozilla Source Tree Docs)

Synopsis

package main

import (
    marionette "github.com/raohwork/marionette-go"
    "github.com/raohwork/marionette-go/mnclient"
    "github.com/raohwork/marionette-go/mnsender"
)

func main() {
    s, err := mnsender.NewTCPSender("127.0.0.1:2828", 0)
    // handler error here

    if err := s.Start(); err != nil {
        // handle error
    }
    defer s.Stop()

    cl := &mnclient.Commander{Sender: s}

    // go to google
    cl.Navigate("https://www.google.com")
}

Helper Docker image

There's a Docker image hosted at Docker Hub. It is a helper for me (and projects using marionette-go, maybe) to run tests at local machine or docker based CI env like DroneCI.

The image accepts 3 envvars

• GO_VER: Go version to download, like 1.11.5.
• FX_VER: Firefox version to download, like 65.0.1.
• XVFB: Disable headless mode, use xvfb instead.

Refer dev-test.sh and .drone.yaml for example usage of this image.

Pitfalls

• I am still learning how actions works. It does not work as expected now. I will fix it sometime, maybe next major version as data structures will doubtlessly need redesigning.
• The behavier of screenshot commands varies with versions and headless mode. Since it still "take screenshot on the document/viewport/element", I will not write workarounds about it.
• The essential command "NewWindow" is not implemented in Firefox 65 (and lower).
• I am not native English speaker so some sentences in docs may look weird. Feel free to submit issue/PR about that.

Promise of compatibility

From the first stable version (3.0.0), new versions will strictly following these rules.

bugfix version (last digit)

• Fixes bug.

Codes depends on older/newer version will work unchanged (if not depends on the buggy behavier I fixed).

minor version (mid digit)

• New feature is introduced.
• Marks some features to be deprecated.
• Alone with some bug fixes.

Codes depends on older version will work unchanged (if not depends on the buggy behavier I fixed).

major version (first digit)

• Remove deprecated feature in previous major version.
• Mozilla changes the command semantically in new version Firefox.
• Mozilla introduces new command in new version Firefox.
• Mozilla removes the support to some command in new version Firefox.
• Marionette protocol version changed.
• Refactor/rewrite the code.

Your code will work differently or fail to compile.

There will be a release note to address the changes and lowest supported Firefox version.

License

LGPLv3 | MPL2.0