Use babel-register script when running babel smoke tests (#442)

Makefile

@@ -19,7 +19,7 @@ test-babel:
 	cd ./build/babel; \
 	jq "del(.nyc)" package.json > package.nonyc.json; \
 	mv -f package.nonyc.json package.json; \
-	../../node_modules/.bin/nyc --no-instrument --no-source-map --reporter=json --report-dir ../../coverage node_modules/mocha/bin/_mocha `scripts/_get-test-directories.sh` --opts test/mocha.opts; \
+	../../node_modules/.bin/nyc --no-instrument --no-source-map --reporter=json --report-dir ../../coverage node_modules/mocha/bin/_mocha `scripts/_get-test-directories.sh` --opts test/mocha.opts --compilers js:../../scripts/test-babel-register.js; \
 
 bootstrap-flow: clean
 	mkdir ./build

package.json

@@ -22,14 +22,14 @@
   },
   "devDependencies": {
     "ava": "^0.18.0",
-    "babel-cli": "^6.14.0",
+    "babel-cli": "^7.0.0-alpha.6",
     "babel-eslint": "^7.0.0",
-    "babel-helper-fixtures": "^6.9.0",
-    "babel-plugin-external-helpers": "^6.18.0",
+    "babel-helper-fixtures": "^7.0.0-alpha.3",
+    "babel-plugin-external-helpers": "^7.0.0-alpha.3",
     "babel-plugin-istanbul": "^4.0.0",
-    "babel-plugin-transform-flow-strip-types": "^6.14.0",
-    "babel-preset-es2015": "^6.14.0",
-    "babel-preset-stage-0": "^6.5.0",
+    "babel-plugin-transform-flow-strip-types": "^7.0.0-alpha.3",
+    "babel-preset-es2015": "^7.0.0-alpha.3",
+    "babel-preset-stage-0": "^7.0.0-alpha.3",
     "chalk": "^1.1.3",
     "cross-env": "^3.1.4",
     "eslint": "^3.7.1",

scripts/test-babel-register.js

@@ -0,0 +1,10 @@
+"use strict";
+
+const register = require("babel-register").default;
+
+register({
+  extensions: [".js"],
+  // Only js files in the test folder but not in the subfolder fixtures.
+  only: [/packages\/.+\/test\/(?!fixtures\/).+\.js$/],
+  compact: true,
+});