Source code for

import inspect
import logging
import sys

from galaxy.util import unicodify

log = logging.getLogger(__name__)

assertion_module_names = ['text', 'tabular', 'xml']

# Code for loading modules containing assertion checking functions, to
# create a new module of assertion functions, create the needed python
# source file "test/base/asserts/<MODULE_NAME>.py" and add
# <MODULE_NAME> to the list of assertion module names defined above.
assertion_modules = []
for assertion_module_name in assertion_module_names:
    full_assertion_module_name = '' + assertion_module_name
        # Dynamically import module
        assertion_module = sys.modules[full_assertion_module_name]
    except Exception:
        log.exception('Failed to load assertion module: %s', assertion_module_name)

[docs]def verify_assertions(data, assertion_description_list): """ This function takes a list of assertions and a string to check these assertions against. """ for assertion_description in assertion_description_list: verify_assertion(data, assertion_description)
[docs]def verify_assertion(data, assertion_description): tag = assertion_description["tag"] assert_function_name = "assert_" + tag assert_function = None for assertion_module in assertion_modules: if hasattr(assertion_module, assert_function_name): assert_function = getattr(assertion_module, assert_function_name) if assert_function is None: errmsg = "Unable to find test function associated with XML tag '%s'. Check your tool file syntax." % tag raise AssertionError(errmsg) assert_function_args = inspect.getargspec(assert_function).args args = {} for attribute, value in assertion_description["attributes"].items(): if attribute in assert_function_args: args[attribute] = value # Three special arguments automatically populated independently of # tool XML attributes. output is passed in as the contents of the # output file. verify_assertions_function is passed in as the # verify_assertions function defined above, this allows # recursively checking assertions on subsections of # output. children is the parsed version of the child elements of # the XML element describing this assertion. See # assert_element_text in test/base/asserts/ as an example of # how to use verify_assertions_function and children in conjuction # to apply assertion checking to a subset of the input. The parsed # version of an elements child elements do not need to just define # assertions, developers of assertion functions can also use the # child elements in novel ways to define inputs the assertion # checking function (for instance consider the following fictional # assertion function for checking column titles of tabular output # - <has_column_titles><with_name name="sequence"><with_name # name="probability"></has_column_titles>.) if "output" in assert_function_args: # This was read in as bytes for checksum and such, but all current # assertions expect text data. If binary assertions are added at # some point, just checkout for "output_bytes" for instance and pass # data in unchanged. args["output"] = unicodify(data) if "verify_assertions_function" in assert_function_args: args["verify_assertions_function"] = verify_assertions if "children" in assert_function_args: args["children"] = assertion_description["children"] # TODO: Verify all needed function arguments are specified. assert_function(**args)