How to use picard - 10 common examples

def test_cmd_performer_custom_join(self):
        context = Metadata()
        context['performer:guitar'] = 'Foo1'
        context['performer:rhythm-guitar'] = 'Foo2'
        context['performer:drums'] = 'Drummer'
        result = self.parser.eval("$performer(guitar, / )", context=context)
        performers = result.split(' / ')
        self.assertIn('Foo1', performers)
        self.assertIn('Foo2', performers)
        self.assertEqual(2, len(performers))

def test_preserve_unchanged_tags(self):
            metadata = Metadata(self.tags)
            save_metadata(self.filename, metadata)
            loaded_metadata = save_and_load_metadata(self.filename, Metadata())
            for (key, value) in self.tags.items():
                self.assertEqual(loaded_metadata[key], value, '%s: %r != %r' % (key, loaded_metadata[key], value))

def test_cmd_copymerge_nosource(self):
        context = Metadata()
        target = ["tag1", "tag2"]
        context["target"] = target
        self._eval_and_check_copymerge(context, target)

def test_comment_delete(self):
            metadata = Metadata()
            for (key, value) in self.tags.items():
                metadata[key] = value
            metadata['comment:bar'] = 'Foo'
            original_metadata = save_and_load_metadata(self.filename, metadata)
            metadata.delete('comment:bar')
            new_metadata = save_and_load_metadata(self.filename, metadata)

            self.assertIn('comment:foo', original_metadata)
            self.assertIn('comment:bar', original_metadata)
            self.assertIn('comment:foo', new_metadata)
            self.assertNotIn('comment:bar', new_metadata)

def test_compare_tracknumber_difference(self):
        m1 = Metadata()
        m1["tracknumber"] = "1"
        m2 = Metadata()
        m2["tracknumber"] = "2"
        self.assertEqual(m1.compare(m2), 0)

def _common_set_up(self, extra=None):
        config.setting = settings.copy()
        if extra is not None:
            config.setting.update(extra)

def test_clear_existing_tags_on(self):
            config.setting['clear_existing_tags'] = True
            existing_metadata = Metadata({'artist': 'The Artist'})
            save_metadata(self.filename, existing_metadata)
            new_metadata = Metadata({'title': 'The Title'})
            loaded_metadata = save_and_load_metadata(self.filename, new_metadata)
            self.assertNotIn('artist', loaded_metadata)
            self.assertEqual(new_metadata['title'], loaded_metadata['title'])

def test_invalid_rating(self):
            filename = os.path.join('test', 'data', 'test-invalid-rating.ogg')
            old_log_level = log.get_effective_level()
            log.set_level(logging.ERROR)
            metadata = load_metadata(filename)
            log.set_level(old_log_level)
            self.assertEqual(metadata["~rating"], "THERATING")

def test_upgrade_to_v1_0_0_final_0_A(self):
        TextOption('setting', 'file_naming_format', '')

        self.config.setting['va_file_naming_format'] = 'abc'
        self.config.setting['use_va_format'] = True

        self.assertIn('va_file_naming_format', self.config.setting)
        self.assertIn('use_va_format', self.config.setting)

        upgrade_to_v1_0_0_final_0(self.config, interactive=False, merge=True)
        self.assertNotIn('va_file_naming_format', self.config.setting)
        self.assertNotIn('use_va_format', self.config.setting)
        self.assertIn('file_naming_format', self.config.setting)

def test_text_opt_set_empty(self):
        TextOption("setting", "text_option", "abc")

        # set option to ""
        self.config.setting["text_option"] = ""
        self.assertEqual(self.config.setting["text_option"], "")