update from Atlas with major reorg

19-dyn-attr-prop/oscon/demo_schedule2.py

@@ -0,0 +1,23 @@
+import shelve
+
+from schedule2 import DB_NAME, CONFERENCE, load_db
+from schedule2 import DbRecord, Event
+
+with shelve.open(DB_NAME) as db:
+    if CONFERENCE not in db:
+        load_db(db)
+    
+    DbRecord.set_db(db)
+    event = DbRecord.fetch('event.33950')
+    print(event)
+    print(event.venue)
+    print(event.venue.name)
+    for spkr in event.speakers:
+        print('{0.serial}: {0.name}'.format(spkr))
+        
+    print(repr(Event.venue))
+    
+    event2 = DbRecord.fetch('event.33451')
+    print(event2)
+    print(event2.fetch)
+    print(event2.venue)

19-dyn-attr-prop/oscon/test_schedule1.py

@@ -0,0 +1,37 @@
+import shelve
+import pytest
+
+import schedule1 as schedule
+
+
+@pytest.yield_fixture
+def db():
+    with shelve.open(schedule.DB_NAME) as the_db:
+        if schedule.CONFERENCE not in the_db:
+            schedule.load_db(the_db)
+        yield the_db
+
+
+def test_record_class():
+    rec = schedule.Record(spam=99, eggs=12)
+    assert rec.spam == 99
+    assert rec.eggs == 12
+
+
+def test_conference_record(db):
+    assert schedule.CONFERENCE in db
+
+
+def test_speaker_record(db):
+    speaker = db['speaker.3471']
+    assert speaker.name == 'Anna Martelli Ravenscroft'
+
+
+def test_event_record(db):
+    event = db['event.33950']
+    assert event.name == 'There *Will* Be Bugs'
+
+
+def test_event_venue(db):
+    event = db['event.33950']
+    assert event.venue_serial == 1449

19-dyn-attr-prop/oscon/test_schedule2.py

@@ -0,0 +1,72 @@
+import shelve
+import pytest
+
+import schedule2 as schedule
+
+
+@pytest.yield_fixture
+def db():
+    with shelve.open(schedule.DB_NAME) as the_db:
+        if schedule.CONFERENCE not in the_db:
+            schedule.load_db(the_db)
+        yield the_db
+
+
+def test_record_attr_access():
+    rec = schedule.Record(spam=99, eggs=12)
+    assert rec.spam == 99
+    assert rec.eggs == 12
+
+
+def test_record_repr():
+    rec = schedule.DbRecord(spam=99, eggs=12)
+    assert 'DbRecord object at 0x' in repr(rec)
+    rec2 = schedule.DbRecord(serial=13)
+    assert repr(rec2) == "<DbRecord serial=13>"
+
+
+def test_conference_record(db):
+    assert schedule.CONFERENCE in db
+
+
+def test_speaker_record(db):
+    speaker = db['speaker.3471']
+    assert speaker.name == 'Anna Martelli Ravenscroft'
+
+
+def test_missing_db_exception():
+    with pytest.raises(schedule.MissingDatabaseError):
+        schedule.DbRecord.fetch('venue.1585')
+
+
+def test_dbrecord(db):
+    schedule.DbRecord.set_db(db)
+    venue = schedule.DbRecord.fetch('venue.1585')
+    assert venue.name == 'Exhibit Hall B'
+
+
+def test_event_record(db):
+    event = db['event.33950']
+    assert repr(event) == "<Event 'There *Will* Be Bugs'>"
+
+
+def test_event_venue(db):
+    schedule.Event.set_db(db)
+    event = db['event.33950']
+    assert event.venue_serial == 1449
+    assert event.venue == db['venue.1449']
+    assert event.venue.name == 'Portland 251'
+
+
+def test_event_speakers(db):
+    schedule.Event.set_db(db)
+    event = db['event.33950']
+    assert len(event.speakers) == 2
+    anna_and_alex = [db['speaker.3471'], db['speaker.5199']]
+    assert event.speakers == anna_and_alex
+
+
+def test_event_no_speakers(db):
+    schedule.Event.set_db(db)
+    event = db['event.36848']
+    assert len(event.speakers) == 0

19-dyn-attr-prop/pseudo_construction.py

@@ -0,0 +1,10 @@
+# pseudo-code for object construction
+def object_maker(the_class, some_arg):
+    new_object = the_class.__new__(some_arg)
+    if isinstance(new_object, the_class):
+        the_class.__init__(new_object, some_arg)
+    return new_object
+
+# the following statements are roughly equivalent
+x = Foo('bar')
+x = object_maker(Foo, 'bar')