String difference gets hidden without -vv

[The-Compiler]

I just had a test failure like this:

str1 = """header:
    <line 1>
    <line 2>
    <this is some longer line which should not be here>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <line 3>"""

str2 = """header:
    <line 1>
    <line 2>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <a lot of more lines so -vv is required>
    <line 3>"""

def test_same():
    assert str1 == str2

Without running with -vv, it's not really apparent where the issue is:

    def test_same():
>       assert str1 == str2
E       assert 'header:\n   ...n    <line 3>' == 'header:\n    ...n    <line 3>'
E         Detailed information truncated, use "-vv" to show

At least some context should probably be shown, similar to what happens without the extra lines:

    def test_same():
>       assert str1 == str2
E       assert 'header:\n   ...n    <line 3>' == 'header:\n    ...n    <line 3>'
E           header:
E               <line 1>
E               <line 2>
E         -     <this is some longer line which should not be here>
E               <line 3>

[nicoddemus]

Agree, thanks for reporting Florian. 😄

[eric-wieser]

This only shows the first lines, which is not enough if the error is in the last line

[nicoddemus]

@eric-wieser thanks for the comment. Would you mind opening a new issue so we can track it? Thanks!