Support passing data a param to Fixture.setup_data()

[albertc1]

It is not easy to have a test file that includes multiple test cases that use different sets of test data for the same resource. It can also make simple test cases much more difficult to understand when the test data is scattered across different files.

Adding one or two params to setup_data could improve both of these issues. I want to be able to use it like:

class MyTest(SparklyTest):
        es = ElasticFixture(...)
    
    def test_a(self):
        es.setup_data(path='fixtures/test_input.json')
        ...

    def test_b(self):
        es.setup_data(
            data=[
                {'_id': '1', '_source': {'attr_1': 'foo', 'attr_2': 42}}
                {'_id': '2', '_source': {'attr_1': 'bar', 'attr_2': 314}}
            ]
        )
        ...
    
    def tearDown(self):
        es.teardown_data()

[skliarpawlo]

@albertc1 thanks for your feedback. Agree that using couple files makes it harder to grasp the whole test. We were thinking about such approach before implementing, but encountered couple of problems:

1. Consistency - for all supported databases we want to have similar fixtures api, but dbs have different syntax. And they are sometimes quite verbose, so data setup could take most place of the test code.

2. Writing data to couple tables inside of one db - so simple param data=[...] will be not enough (in current implementation for example MysqlFixture), and needs more boilerplate.

But anyway I'm good with implementing this, when we will have more or less consistent picture who to implement this.

Quick solution for this I see is to make it possible to use strings together with file_path:

class MyTest(SparklyGlobalContextTest):
    data = """  
       CREATE TABLE ...
       INSERT INTO ...
    """
    fixtures = [MysqlFixture(host, port, data=data)]

More sophisticated solution, setup data with plain python structures:

class MyTest(SparklyGlobalContextTest):
    data = [{
      '_id': '1', 'attr_1': 'foo', 'attr_2': 'bar',
    },{...}]
    fixtures = [MysqlFixture(host, port, db, table, data=data),
                     ElasticFixture(host, port, index, es_type, data=data),]

So that each "fixture" instance corresponds to only one "table" in the database.

Thoughts?