tiny-test-fw: move to tools/esp_python_packages:

make `tiny_test_fw` as a package and move to root path of idf python
packages

tools/ci/python_packages/tiny_test_fw/EnvConfig.py

@@ -0,0 +1,79 @@
+# Copyright 2015-2017 Espressif Systems (Shanghai) PTE LTD
+#
+# 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.
+
+"""
+The test env could change when we running test from different computers.
+Test env config provide ``get_variable`` method to allow user get test environment related variables.
+It will first try to get variable from config file.
+If failed, then it will try to auto detect (Not supported yet).
+
+Config file format is yaml. it's a set of key-value pair. The following is an example of config file::
+
+    Example_WIFI:
+      ap_ssid: "myssid"
+      ap_password: "mypassword"
+    Example_ShieldBox:
+      attenuator_port: "/dev/ttyUSB2"
+      ap_ssid: "myssid"
+      ap_password: "mypassword"
+
+It will first define the env tag for each environment, then add its key-value pairs.
+This will prevent test cases from getting configs from other env when there're configs for multiple env in one file.
+"""
+
+import yaml
+
+try:
+    from yaml import CLoader as Loader
+except ImportError:
+    from yaml import Loader as Loader
+
+
+class Config(object):
+    """ Test Env Config """
+
+    def __init__(self, config_file, env_tag):
+        self.configs = self.load_config_file(config_file, env_tag)
+
+    @staticmethod
+    def load_config_file(config_file, env_name):
+        """
+        load configs from config file.
+
+        :param config_file: config file path
+        :param env_name: env tag name
+        :return: configs for the test env
+        """
+        try:
+            with open(config_file) as f:
+                configs = yaml.load(f, Loader=Loader)[env_name]
+        except (OSError, TypeError, IOError):
+            configs = dict()
+        return configs
+
+    def get_variable(self, variable_name):
+        """
+        first try to get from config file. if not found, try to auto detect the variable.
+
+        :param variable_name: name of variable
+        :return: value or None
+        """
+        try:
+            value = self.configs[variable_name]
+        except KeyError:
+            # TODO: to support auto get variable here
+            value = None
+        if value is None:
+            raise ValueError("Failed to get variable")
+        return value