improve doctest coverage for schemes/generic/spec.py

[aghitza]

The attached patch adds a _latex_() method for Spec's of rings and improves the doctest coverage of spec.py from 42% (3 of 7) to 75% (6 of 8).

The two remaining methods are currently involved in other tickets that will also take care of adding doctests: see #5629 for dimension() and #5479 for __call__()

Component: algebraic geometry

Keywords: spec doctest latex

Issue created by migration from https://trac.sagemath.org/ticket/5630

[williamstein]

comment:4

This doctest fails for me on 32-bit OS X:

teragon:sage-3.4 wstein$ sage -t devel/sage/sage/schemes/generic/spec.py 
sage -t  "devel/sage/sage/schemes/generic/spec.py"          
**********************************************************************
File "/Users/wstein/build/sage-3.4/devel/sage/sage/schemes/generic/spec.py", line 116:
    sage: Spec(QQ) < 5
Expected:
    True
Got:
    False

Since the result is meaningless, you could flag it

sage:  spec(QQ) < 5   # random -- platform dependent

or instead have a test

sage: spec(QQ) == 5
False

If you fix this one issue, then this will get "positive review" from me.

[aghitza]

comment:5

Attachment: trac_5630.patch.gz

Ah, I had misinterpreted the existing docstring for _cmp_. I removed the offending doctest (the one with Spec(QQ) == 5 is already there) and clarified the docstring a little bit.

New patch is up replacing the old one.

[sagetrac-mabshoff]

comment:7

Merged in Sage 3.4.1.rc0.

Cheers,

Michael