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# This file is part of beets.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
"""Tests for the 'limit' plugin."""
from beets.test.helper import PluginTestCase
class LimitPluginTest(PluginTestCase):
"""Unit tests for LimitPlugin
Note: query prefix tests do not work correctly with `run_with_output`.
"""
plugin = "limit"
def setUp(self):
super().setUp()
# we'll create an even number of tracks in the library
self.num_test_items = 10
assert self.num_test_items % 2 == 0
for item_no, item in enumerate(
self.add_item_fixtures(count=self.num_test_items)
):
item.track = item_no + 1
item.store()
# our limit tests will use half of this number
self.num_limit = self.num_test_items // 2
self.num_limit_prefix = "".join(["'", "<", str(self.num_limit), "'"])
# a subset of tests has only `num_limit` results, identified by a
# range filter on the track number
self.track_head_range = f"track:..{self.num_limit}"
self.track_tail_range = f"track:{self.num_limit + 1}{'..'}"
def test_no_limit(self):
"""Returns all when there is no limit or filter."""
result = self.run_with_output("lslimit")
assert result.count("\n") == self.num_test_items
def test_lslimit_head(self):
"""Returns the expected number with `lslimit --head`."""
result = self.run_with_output("lslimit", "--head", str(self.num_limit))
assert result.count("\n") == self.num_limit
def test_lslimit_tail(self):
"""Returns the expected number with `lslimit --tail`."""
result = self.run_with_output("lslimit", "--tail", str(self.num_limit))
assert result.count("\n") == self.num_limit
def test_lslimit_head_invariant(self):
"""Returns the expected number with `lslimit --head` and a filter."""
result = self.run_with_output(
"lslimit", "--head", str(self.num_limit), self.track_tail_range
)
assert result.count("\n") == self.num_limit
def test_lslimit_tail_invariant(self):
"""Returns the expected number with `lslimit --tail` and a filter."""
result = self.run_with_output(
"lslimit", "--tail", str(self.num_limit), self.track_head_range
)
assert result.count("\n") == self.num_limit
def test_prefix(self):
"""Returns the expected number with the query prefix."""
result = self.lib.items(self.num_limit_prefix)
assert len(result) == self.num_limit
def test_prefix_when_correctly_ordered(self):
"""Returns the expected number with the query prefix and filter when
the prefix portion (correctly) appears last."""
correct_order = f"{self.track_tail_range} {self.num_limit_prefix}"
result = self.lib.items(correct_order)
assert len(result) == self.num_limit
def test_prefix_when_incorrectly_ordred(self):
"""Returns no results with the query prefix and filter when the prefix
portion (incorrectly) appears first."""
incorrect_order = f"{self.num_limit_prefix} {self.track_tail_range}"
result = self.lib.items(incorrect_order)
assert len(result) == 0
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