Add OnICECandidate and OnICEGatheringStateChange methods to
PeerConnection. The main goal of this change is to improve API
compatibility with the JavaScript/Wasm bindings. It does not actually
add trickle ICE support or change the ICE candidate gathering process,
which is still synchronous in the Go implementation. Rather, it fires
the appropriate events similar to they way they would be fired in a true
trickle ICE process.
Remove unused OnNegotiationNeeded event handler. This handler is not
required for most applications and would be difficult to implement in
Go. This commit removes the handler from the JavaScript/Wasm bindings,
which leads to a more similar API for Go and JavaScript/Wasm.
Add OnICEGatheringStateChange to the JavaScript/Wasm bindings. Also
changes the Go implementation so that the function signatures match.
Fixes#515
This includes a few small and closely related changes:
1. All occurrences of the build tag `+build js` have been changed to the
more precise `+build js,wasm`. This will exclude the files from being
included by third-party compilers like GopherJS, with which they are
incompatible.
2. Some files which are incompatible with JavaScript/Wasm now have the
correct build tag (`+build -js`) so they will be excluded from Wasm
builds.
3. Some configuration options which are incompatible with
JavaScript/Wasm (or at least the current bindings) will now no longer
appear in Wasm builds. This meant creating new files with new struct
definitions and the appropriate build tags.
The tests are run in a Node.js environment, and this does not include
any browser tests. This requires the wrtc package from npm as well as a
shim which adds portions of the WebRTC API to the global scope.
Some tests introduced here can be combined when differences between the
Go API and the WASM bindings are addressed and as missing features are
added to the WASM bindings.
We can and should add more tests in the future to improve test coverage.
This should be considered the minimum number of tests reuqired to ensure
basic functionality is working.
