AssertionError being raised instead of showing "Difference (LHS vs RHS)"

[nonamethanks]

from ward import test

def assert_something(l, v):
    assert l == v

@test("test", tags=["test"])
def _() -> None:
    assert_something(1, 2)

Compare the result of this:

with what happens if the assert is in the main body:

How do I make it print the proper output normally? For large tests it becomes a mess to figure out what's wrong unless I assign a million variables in each function in order to inspect the locals. I checked the documentation and found no mention of reusing assertions like this.

[StefanBRas]

From a quick view it looks like ward will modify assert statements into its own assert functions from ward.expect. However this probably only happens inside functions decorated with @test.

You can use these assertion functions directly. Your example would then become

from ward import test
from ward.expect import assert_equal

def assert_something(l, v):
    assert_equal(l,v, "") # must have a msg

@test("test", tags=["test"])
def _() -> None:
    assert_something(1, 2)

[nonamethanks]

Unfortunately these assert_ functions are not good enough. For one, they don't show the full traceback. Try putting the function assert_something in another file and importing it, and you'll see that the test will then only print the code for the current file on failures (the _() function, not any individual assert failing inside assert_something), which is pretty much useless if you're doing any serious testing.