pokedex/tests/test_schema.py

   1 # encoding: utf8
   2 from nose.tools import *
   3 import unittest
   4 from sqlalchemy import Column, Integer, String, create_engine
   5 from sqlalchemy.orm import class_mapper, joinedload, sessionmaker
   6 from sqlalchemy.orm.session import Session
   7 from sqlalchemy.ext.declarative import declarative_base
   8
   9 from pokedex.db import tables, markdown
  10 from pokedex.db.multilang import MultilangScopedSession, MultilangSession, \
  11     create_translation_table
  12
  13 def test_variable_names():
  14     """We want pokedex.db.tables to export tables using the class name"""
  15     for varname in dir(tables):
  16         if not varname[0].isupper():
  17             continue
  18         table = getattr(tables, varname)
  19         try:
  20             if not issubclass(table, tables.TableBase) or table is tables.TableBase:
  21                 continue
  22         except TypeError:
  23             continue
  24         classname = table.__name__
  25         if classname and varname[0].isupper():
  26             assert varname == classname, '%s refers to %s' % (varname, classname)
  27     for table in tables.mapped_classes:
  28         assert getattr(tables, table.__name__) is table
  29
  30 def test_class_order():
  31     """The declarative classes should be defined in alphabetical order.
  32     Except for Language which should be first.
  33     """
  34     class_names = [table.__name__ for table in tables.mapped_classes]
  35     def key(name):
  36         return name != 'Language', name
  37     print [(a,b) for (a,b) in zip(class_names, sorted(class_names, key=key)) if a!=b]
  38     assert class_names == sorted(class_names, key=key)
  39
  40 def test_i18n_table_creation():
  41     """Creates and manipulates a magical i18n table, completely independent of
  42     the existing schema and data.  Makes sure that the expected behavior of the
  43     various proxies and columns works.
  44     """
  45     Base = declarative_base()
  46     engine = create_engine("sqlite:///:memory:", echo=True)
  47
  48     Base.metadata.bind = engine
  49
  50     # Need this for the foreign keys to work!
  51     class Language(Base):
  52         __tablename__ = 'languages'
  53         id = Column(Integer, primary_key=True, nullable=False)
  54         identifier = Column(String(2), nullable=False, unique=True)
  55
  56     class Foo(Base):
  57         __tablename__ = 'foos'
  58         __singlename__ = 'foo'
  59         id = Column(Integer, primary_key=True, nullable=False)
  60         translation_classes = []
  61
  62     FooText = create_translation_table('foo_text', Foo, 'texts',
  63         language_class=Language,
  64         name = Column(String(100)),
  65     )
  66
  67     # OK, create all the tables and gimme a session
  68     Base.metadata.create_all()
  69     sm = sessionmaker(class_=MultilangSession)
  70     sess = MultilangScopedSession(sm)
  71
  72     # Create some languages and foos to bind together
  73     lang_en = Language(identifier='en')
  74     sess.add(lang_en)
  75     lang_jp = Language(identifier='jp')
  76     sess.add(lang_jp)
  77     lang_ru = Language(identifier='ru')
  78     sess.add(lang_ru)
  79
  80     foo = Foo()
  81     sess.add(foo)
  82
  83     # Commit so the above get primary keys filled in, then give the
  84     # session the language id
  85     sess.commit()
  86     # Note that this won't apply to sessions created in other threads, but that
  87     # ought not be a problem!
  88     sess.default_language_id = lang_en.id
  89
  90     # Give our foo some names, as directly as possible
  91     foo_text = FooText()
  92     foo_text.foreign_id = foo.id
  93     foo_text.local_language_id = lang_en.id
  94     foo_text.name = 'english'
  95     sess.add(foo_text)
  96
  97     foo_text = FooText()
  98     foo_text.foo_id = foo.id
  99     foo_text.local_language_id = lang_jp.id
 100     foo_text.name = 'nihongo'
 101     sess.add(foo_text)
 102
 103     # Commit!  This will expire all of the above.
 104     sess.commit()
 105
 106     ### Test 1: re-fetch foo and check its attributes
 107     foo = sess.query(Foo).params(_default_language='en').one()
 108
 109     # Dictionary of language identifiers => names
 110     assert foo.name_map[lang_en] == 'english'
 111     assert foo.name_map[lang_jp] == 'nihongo'
 112
 113     # Default language, currently English
 114     assert foo.name == 'english'
 115
 116     sess.expire_all()
 117
 118     ### Test 2: querying by default language name should work
 119     foo = sess.query(Foo).filter_by(name='english').one()
 120
 121     assert foo.name == 'english'
 122
 123     sess.expire_all()
 124
 125     ### Test 3: joinedload on the default name should appear to work
 126     # THIS SHOULD WORK SOMEDAY
 127     #    .options(joinedload(Foo.name)) \
 128     foo = sess.query(Foo) \
 129         .options(joinedload(Foo.texts_local)) \
 130         .one()
 131
 132     assert foo.name == 'english'
 133
 134     sess.expire_all()
 135
 136     ### Test 4: joinedload on all the names should appear to work
 137     # THIS SHOULD ALSO WORK SOMEDAY
 138     #    .options(joinedload(Foo.name_map)) \
 139     foo = sess.query(Foo) \
 140         .options(joinedload(Foo.texts)) \
 141         .one()
 142
 143     assert foo.name_map[lang_en] == 'english'
 144     assert foo.name_map[lang_jp] == 'nihongo'
 145
 146     sess.expire_all()
 147
 148     ### Test 5: Mutating the dict collection should work
 149     foo = sess.query(Foo).one()
 150
 151     foo.name_map[lang_en] = 'different english'
 152     foo.name_map[lang_ru] = 'new russian'
 153
 154     sess.commit()
 155
 156     assert foo.name_map[lang_en] == 'different english'
 157     assert foo.name_map[lang_ru] == 'new russian'
 158
 159 def test_texts():
 160     """Check DB schema for integrity of text columns & translations.
 161
 162     Mostly protects against copy/paste oversights and rebase hiccups.
 163     If there's a reason to relax the tests, do it
 164     """
 165     classes = []
 166     for cls in tables.mapped_classes:
 167         classes.append(cls)
 168         classes += cls.translation_classes
 169     for cls in classes:
 170         if hasattr(cls, 'local_language') or hasattr(cls, 'language'):
 171             good_formats = 'markdown plaintext gametext'.split()
 172             assert_text = '%s is language-specific'
 173         else:
 174             good_formats = 'identifier latex'.split()
 175             assert_text = '%s is not language-specific'
 176         columns = sorted(cls.__table__.c, key=lambda c: c.name)
 177         text_columns = []
 178         for column in columns:
 179             format = column.info.get('format', None)
 180             if format is not None:
 181                 if format not in good_formats:
 182                     raise AssertionError(assert_text % column)
 183                 is_markdown = isinstance(column.type, markdown.MarkdownColumn)
 184                 if is_markdown != (format == 'markdown'):
 185                     raise AssertionError('%s: markdown format/column type mismatch' % column)
 186                 if (format != 'identifier') and (column.name == 'identifier'):
 187                     raise AssertionError('%s: identifier column name/type mismatch' % column)
 188                 if column.info.get('official', None) and format not in 'gametext plaintext':
 189                     raise AssertionError('%s: official text with bad format' % column)
 190                 text_columns.append(column)
 191             else:
 192                 if isinstance(column.type, (markdown.MarkdownColumn, tables.Unicode)):
 193                     raise AssertionError('%s: text column without format' % column)
 194             if column.name == 'name' and format != 'plaintext':
 195                 raise AssertionError('%s: non-plaintext name' % column)
 196             # No mention of English in the description
 197             assert 'English' not in column.info['description'], column
 198         # If there's more than one text column in a translation table,
 199         # they have to be nullable, to support missing translations
 200         if hasattr(cls, 'local_language') and len(text_columns) > 1:
 201             for column in text_columns:
 202                 assert column.nullable
 203
 204 def test_identifiers_with_names():
 205     """Test that named tables have identifiers, and non-named tables don't
 206
 207     ...have either names or identifiers.
 208     """
 209     for table in sorted(tables.mapped_classes, key=lambda t: t.__name__):
 210         if hasattr(table, 'name'):
 211             assert hasattr(table, 'identifier'), table
 212         else:
 213             assert not hasattr(table, 'identifier'), table