This post updates the Gigantic Win post
<https://groups.google.com/d/msg/leo-editor/_4TNCZt6-cA/I76d0d4QCwAJ>.*
tl;dr*: TDD is available for Leo *right now*.
*Executive summary (updated)*
1. A *preamble *in each @test node makes it easy to run unit tests locally,
without reloading Leo!
2. *A local @button node* (given below) creates new @test nodes, with
*customized
*preambles.
For the first time *ever*, easy test-driven development is available, *right
now*.
*@button make-test*
The following (tested) @button node works spectacularly well. Just change
the name constant when switching *kinds* of tests.
'''Make an @test node for the importer whose name is given.'''
name = 'otl'
d = g.app.permanentScriptDict
tag = 'make_test_%s_n' % name
n = d.get(tag, 0) + 1
d [tag] = n
d = {'n': n, 'name': name}
<< define preamble >>
p = c.lastTopLevel().insertAfter()
p.b = preamble
p.h = '@test %(name)s importer-%(n)s' % d
c.redraw()
c.selectPosition(p)
c.bodyWantsFocusNow()
c.frame.body.wrapper.setInsertPoint(len(p.b))
The @button make-test script does the following (with name = 'otl' as
shown):
1. Creates a node called "@test otl importer-N" where N increases every
time you run the script.
For example, make-test, Ctrl-P, Ctrl-P creates:
@test otl importer-1
@test otl importer-2
@test otl importer-3
If you change name to 'javascript', hitting Ctrl-P three times will create
the more nodes:
@test javascript importer-1
@test javascript importer-2
@test javascript importer-3
Every time you run the script, the scripts selects new @test node and
places cursor at the end of the node's body text, ready for you to start
the real test!
Here is my present << define preamble >> section:
preamble = '''\
if 1:
# The preamble...
g.cls()
if c.isChanged(): c.save()
import imp
import leo.plugins.importers.linescanner as linescanner
import leo.plugins.importers.%(name)s as %(name)s
imp.reload(linescanner)
imp.reload(%(name)s)
# insert test for %(name)s here.
''' % d
As you can see, the preamble inserts the 'name' constant automatically. No
need to change this by hand, unless you want a different preamble
altogether.
*Summary*
@button make-test makes TDD *effortless.* It will soon appear in scripts.leo
Today's work proves that we have only begun to see what is possible with
Leo.
On this Thanksgiving day, I am truly grateful to have been given the
opportunity to make this discovery. And thanks to all of you for your
ongoing support and encouragement.
Edward
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