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+# Functest Framework
+
+created by [Cédric Ollivier](mailto:cedric.ollivier@orange.com)
+
+2017/04/24
+
+Note:
+
+- Functest integrates lots of heteregeounous testcases:
+    - python vs bash
+    - internal vs external
+- it aims to benefit from object programming
+    - to define common operations
+    - to avoid conditional instructions regarding the testcases
+    - to avoid duplicating code
+    - to ease the integration of third-party testcases (written in Bash or Python)
+
+
+
+## Quick overview
+
+
+### Functest function calls
+
+- **CI** calls *run_tests.py* (please see [jenkins jobs](https://gerrit.opnfv.org/gerrit/gitweb?p=releng.git;a=tree;f=jjb/functest))
+- *run_tests.py* parses *functest/ci/testcases.yaml* to:
+    - check which testcase(s) must be run
+    - execute the common operations on every testcase (run, push its results to db...)
+<!-- .element: class="fragment highlight-red"-->
+    - return the right status code to **CI**
+
+
+### Our target
+
+- limit run_tests.py instructions by defining:
+    - the basic testcase attritutes
+    - all common operations
+    - the status codes expected
+- avoid duplicating codes between testcases
+- ease the developpement of third-party testcases (aka features)
+
+
+
+## class TestCase
+
+base model for single test case
+
+
+### instance attributes
+
+- project_name (default: 'functest')
+- case_name
+- criteria
+- start_time
+- stop_time
+- details
+
+
+### methods
+
+| Method            | Purpose                                    |
+|-------------------|--------------------------------------------|
+| run(**kwargs)     | run the test case                          |
+| check_criteria()  | interpret the results of the test case     |
+| push_to_db()      | push the results of the test case to the DB|
+
+
+### run(**kwargs)
+
+- the subclasses must override the default implementation which is false on purpose
+- the new implementation must set the following attributes to push the results to DB:
+    - criteria
+    - start_time
+    - stop_time
+
+
+### class attributes
+
+| Status code        | Returned when       |
+|--------------------|---------------------|
+| EX_OK              | everything is OK    |
+| EX_RUN_ERROR       | run() failed        |
+| EX_TESTCASE_FAILED | results are false   |
+| EX_PUSH_TO_DB_ERROR| push_to_db() failed |
+
+
+### run_tests.py
+
+```python
+module = importlib.import_module(run_dict['module'])
+cls = getattr(module, run_dict['class'])
+test_dict = ft_utils.get_dict_by_test(test_name)
+test_case = cls(**test_dict)
+try:
+    kwargs = run_dict['args']
+    result = test_case.run(**kwargs)
+except KeyError:
+    result = test_case.run()
+if result == testcase.TestCase.EX_OK:
+    if GlobalVariables.REPORT_FLAG:
+        test_case.push_to_db()
+    result = test_case.check_criteria()
+```
+
+
+
+## Your first test case
+
+
+### first.py
+
+```python
+#!/usr/bin/env python
+
+import time
+
+from functest.core import testcase
+
+class Test(testcase.TestCase):
+
+    def run(self, **kwargs):
+        self.start_time = time.time()
+        print "Hello World"
+        self.criteria = 'PASS'
+        self.stop_time = time.time()
+        return testcase.TestCase.EX_OK
+```
+
+
+### functest/ci/testcases.yaml
+
+```yaml
+case_name: first
+project_name: functest
+criteria: 'status == "PASS"'
+blocking: true
+clean_flag: false
+description: ''
+dependencies:
+    installer: ''
+    scenario: ''
+run:
+    module: 'first'
+    class: 'Test'
+```
+
+
+
+## class Feature
+bases: TestCase
+
+base model for single feature
+
+
+### methods
+
+| Method            | Purpose                   |
+|-------------------|---------------------------|
+| run(**kwargs)     | run the feature           |
+| execute(**kwargs) | execute the Python method |
+
+
+### run(**kwargs)
+
+- allows executing any Python method by calling execute()
+- sets the following attributes required to push the results to DB:
+    - criteria
+    - start_time
+    - stop_time
+- doesn't fulfill details when pushing the results to the DB.
+
+
+### execute(**kwargs)
+
+- the subclasses must override the default implementation which is false on purpose
+- the new implementation must return 0 if success or anything else if failure.
+
+
+
+## Your second test case
+
+
+### second.py
+
+```python
+#!/usr/bin/env python
+
+from functest.core import feature
+
+class Test(feature.Feature):
+
+    def execute(self, **kwargs):
+        print "Hello World"
+        return 0
+```
+
+
+### functest/ci/testcases.yaml
+
+```yaml
+case_name: second
+project_name: functest
+criteria: 'status == "PASS"'
+blocking: true
+clean_flag: false
+description: ''
+dependencies:
+    installer: ''
+    scenario: ''
+run:
+    module: 'second'
+    class: 'Test'
+```
+
+
+
+## class BashFeature
+bases: Feature
+
+class designed to run any bash command
+
+
+### execute(**kwargs)
+
+execute the cmd passed as arg.
+
+
+
+## Your third test case
+
+
+### functest/ci/testcases.yaml
+
+```
+case_name: third
+project_name: functest
+criteria: 'status == "PASS"'
+blocking: true
+clean_flag: false
+description: ''
+dependencies:
+    installer: ''
+    scenario: ''
+run:
+    module: 'functest.core.feature'
+    class: 'BashFeature'
+    args:
+        cmd: 'echo Hello World; exit 0'
+```
+
+
+
+## Euphrates
+
+
+### Next actions
+
+- __to finish VNF abstraction (coverage + pylint)__
+- to publish doc API
+- to manage criteria as written in testcases.yaml
+
+Please see [Functest Euphrates page](https://wiki.opnfv.org/display/functest/Functest+Euphrates+page) for more details
+
+
+
+## Thank You!