Dockerize Jason's browser unit testing

.env

@@ -1,10 +1,8 @@
 RUST_LOG=debug
 
 MEDEA_CONF=_dev/config.toml
-MEDEA_CONTROL_STATIC_SPECS_DIR=_dev/specs/
+MEDEA_CONTROL__STATIC_SPECS_DIR=_dev/specs/
 
 COMPOSE_PROJECT_NAME=medea
 COMPOSE_IMAGE_NAME=instrumentisto/medea
 COMPOSE_IMAGE_VER=dev
-
-CHROMEDRIVER_CLIENT_ARGS=--use-fake-device-for-media-stream --use-fake-ui-for-media-stream

.travis.yml

@@ -93,19 +93,25 @@ jobs:
       rust: stable
       script: make test.unit crate=medea
 
-    - name: unit medea-jason (nightly)
+    - name: unit medea-jason (stable, Chrome)
       stage: test
-      # Run on stable when -Z install-upgrade is out,
-      # see: https://github.com/rust-lang/cargo/issues/6797
-      rust: nightly
-      addons:
-        chrome: stable
-        apt:
-          packages: ["chromium-chromedriver"]
+      rust: stable
+      services: ["docker"]
+      before_script:
+        - cargo uninstall wasm-bindgen-cli || echo > /dev/null
+        - cargo install wasm-bindgen-cli
+        - rustup target add wasm32-unknown-unknown
+      script: make test.unit crate=medea-jason browser=chrome
+
+    - name: unit medea-jason (stable, Firefox)
+      stage: test
+      rust: stable
+      services: ["docker"]
       before_script:
-        - cargo +nightly install wasm-bindgen-cli -Z install-upgrade
+        - cargo uninstall wasm-bindgen-cli || echo > /dev/null
+        - cargo install wasm-bindgen-cli
         - rustup target add wasm32-unknown-unknown
-      script: make test.unit crate=medea-jason
+      script: make test.unit crate=medea-jason browser=firefox
 
     - name: E2E signalling (stable)
       stage: test