Use examples from dev/platforms for test

scripts/install_devplatforms.py

@@ -0,0 +1,30 @@
+# Copyright (c) 2014-present PlatformIO <contact@platformio.org>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import json
+import subprocess
+import sys
+
+
+def main():
+    platforms = json.loads(
+        subprocess.check_output(
+            ["platformio", "platform", "search", "--json-output"]))
+    for platform in platforms:
+        subprocess.check_call(
+            ["platformio", "platform", "install", platform['repository']])
+
+
+if __name__ == "__main__":
+    sys.exit(main())