Introduce hypothesis into codebase

.gitignore

@@ -16,3 +16,4 @@ env
 dist
 docs/_build/
 vdirsyncer/version.py
+.hypothesis

Makefile

@@ -31,7 +31,7 @@ install-servers:
 	done
 
 install-test: install-servers
-	pip install pytest pytest-xprocess pytest-localserver
+	pip install pytest pytest-xprocess pytest-localserver hypothesis pytest-subtesthack
 	[ $(TRAVIS) != "true" ] || pip install coverage codecov
 
 test:

tests/cli/test_main.py

@@ -1,12 +1,17 @@
 # -*- coding: utf-8 -*-
 
+import json
 from textwrap import dedent
 
 from click.testing import CliRunner
 
+from hypothesis import example, given
+import hypothesis.strategies as st
+
 import pytest
 
 import vdirsyncer.cli as cli
+from vdirsyncer.utils.compat import PY2, to_native
 
 
 def test_simple_run(tmpdir, runner):
@@ -257,35 +262,58 @@ def test_multiple_pairs(tmpdir, runner):
     ])
 
 
-def test_create_collections(tmpdir, runner):
-    runner.write_with_general(dedent('''
-    [pair foobar]
-    a = foo
-    b = bar
-    collections = ["a", "b", "c"]
+@given(collections=st.sets(
+    st.text(
+        st.characters(
+            blacklist_characters=set(
+                u'./\x00'  # Invalid chars on POSIX filesystems
+                + (u';' if PY2 else u'')  # https://bugs.python.org/issue16374
+            ),
+            # Surrogates can't be encoded to utf-8 in Python
+            blacklist_categories=set(['Cs'])
+        ),
+        min_size=1,
+        max_size=50
+    ),
+    min_size=1
+))
+@example(collections=[u'persönlich'])
+def test_create_collections(subtest, collections):
+    collections = set(to_native(x, 'utf-8') for x in collections)
 
-    [storage foo]
-    type = filesystem
-    path = {base}/foo/
-    fileext = .txt
+    @subtest
+    def test_inner(tmpdir, runner):
+        runner.write_with_general(dedent('''
+        [pair foobar]
+        a = foo
+        b = bar
+        collections = {colls}
 
-    [storage bar]
-    type = filesystem
-    path = {base}/bar/
-    fileext = .txt
-    '''.format(base=str(tmpdir))))
+        [storage foo]
+        type = filesystem
+        path = {base}/foo/
+        fileext = .txt
 
-    result = runner.invoke(['sync'])
-    assert result.exception
-    entries = set(x.basename for x in tmpdir.listdir())
-    assert 'foo' not in entries and 'bar' not in entries
+        [storage bar]
+        type = filesystem
+        path = {base}/bar/
+        fileext = .txt
+        '''.format(base=str(tmpdir), colls=json.dumps(list(collections)))))
 
-    result = runner.invoke(['sync'], input='y\n' * 6)
-    assert not result.exception
-    assert \
-        set(x.basename for x in tmpdir.join('foo').listdir()) == \
-        set(x.basename for x in tmpdir.join('bar').listdir()) == \
-        set('abc')
+        result = runner.invoke(['sync'])
+        assert result.exception
+        entries = set(x.basename for x in tmpdir.listdir())
+        assert 'foo' not in entries and 'bar' not in entries
+
+        result = runner.invoke(
+            ['sync'],
+            input='y\n' * 2 * (len(collections) + 1)
+        )
+        assert not result.exception
+        assert \
+            set(x.basename for x in tmpdir.join('foo').listdir()) == \
+            set(x.basename for x in tmpdir.join('bar').listdir()) == \
+            set(collections)
 
 
 def test_ident_conflict(tmpdir, runner):

vdirsyncer/cli/tasks.py

@@ -4,9 +4,9 @@ import functools
 import json
 
 from .config import CollectionConfig
-from .utils import CliError, JobFailed, cli_logger, collections_for_pair, \
-    get_status_name, handle_cli_error, load_status, save_status, \
-    storage_class_from_config, storage_instance_from_config
+from .utils import CliError, JobFailed, cli_logger, coerce_native, \
+    collections_for_pair, get_status_name, handle_cli_error, load_status, \
+    save_status, storage_class_from_config, storage_instance_from_config
 
 from ..sync import sync
 
@@ -24,10 +24,12 @@ def prepare_pair(wq, pair_name, collections, config, callback, **kwargs):
         try:
             config_a, config_b = all_collections[collection_name]
         except KeyError:
-            raise CliError('Pair {}: Collection {} not found. These are the '
-                           'configured collections:\n{}'
-                           .format(pair_name, collection_name,
-                                   list(all_collections)))
+            raise CliError(
+                'Pair {}: Collection {} not found. These are the '
+                'configured collections:\n{}'
+                .format(pair_name,
+                        coerce_native(collection_name),
+                        list(all_collections)))
         new_workers += 1
 
         collection = CollectionConfig(pair, collection_name, config_a,
@@ -44,11 +46,12 @@ def sync_collection(wq, collection, general, force_delete):
     status_name = get_status_name(pair.name, collection.name)
 
     try:
-        cli_logger.info('Syncing {}'.format(status_name))
+        cli_logger.info('Syncing {}'.format(coerce_native(status_name)))
 
         status = load_status(general['status_path'], pair.name,
                              collection.name, data_type='items') or {}
-        cli_logger.debug('Loaded status for {}'.format(status_name))
+        cli_logger.debug('Loaded status for {}'
+                         .format(coerce_native(status_name)))
 
         a = storage_instance_from_config(collection.config_a)
         b = storage_instance_from_config(collection.config_b)

vdirsyncer/cli/utils.py

@@ -18,6 +18,7 @@ from . import CliError, cli_logger
 from .. import DOCS_HOME, exceptions
 from ..sync import IdentConflict, StorageEmpty, SyncConflict
 from ..utils import expand_path, get_class_init_args
+from ..utils.compat import to_native
 
 try:
     import Queue as queue
@@ -119,7 +120,7 @@ def handle_cli_error(status_name=None):
         pass
     except Exception as e:
         if status_name:
-            msg = 'Unhandled exception occured for {}.'.format(status_name)
+            msg = 'Unhandled exception occured for {!r}.'.format(status_name)
         else:
             msg = 'Unhandled exception occured.'
 
@@ -226,7 +227,7 @@ def _discover_from_config(config):
 def _handle_collection_not_found(config, collection, e=None):
     storage_name = config.get('instance_name', None)
 
-    cli_logger.error('{}No collection {} found for storage {}.'
+    cli_logger.error('{}No collection {!r} found for storage {}.'
                      .format('{}\n'.format(e) if e else '',
                              collection, storage_name))
 
@@ -487,3 +488,10 @@ def assert_permissions(path, wanted):
         cli_logger.warning('Correcting permissions of {} from {:o} to {:o}'
                            .format(path, permissions, wanted))
         os.chmod(path, wanted)
+
+
+def coerce_native(x, encoding='utf-8'):
+    try:
+        return to_native(x, encoding)
+    except UnicodeError:
+        return repr(x)