wehub-resource-sync
141 lines
5.4 KiB
Python
141 lines
5.4 KiB
Python
"""Unit tests for the Linux Windows-font mismatch warning (browser.py).
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The warning fires once per environment when spoofing Windows on a font-less
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Linux host. These tests mock platform, fc-list, and the cache dir so they are
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host-independent and need no binary. The warning is written straight to stderr
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(like the welcome banner and the JS/.NET wrappers), so capture it with capsys.
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"""
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import subprocess
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from unittest.mock import patch
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import pytest
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import cloakbrowser.browser as browser
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WIN_ARGS = ["--fingerprint-platform=windows", "--no-sandbox"]
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MSG = "Incomplete Windows font set"
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# fc-list output containing all 8 Windows tell fonts (the complete set).
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ALL_WIN_FONTS = (
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"Segoe UI:style=Regular\nSegoe UI Light:style=Light\nCalibri:style=Regular\n"
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"Marlett:style=Regular\nMS UI Gothic:style=Regular\n"
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"Franklin Gothic Medium:style=Regular\nConsolas:style=Regular\n"
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"Courier New:style=Regular"
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)
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@pytest.fixture(autouse=True)
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def _reset_in_process_flag():
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"""Each test starts with the once-per-process guard cleared."""
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browser._font_warning_checked = False
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yield
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browser._font_warning_checked = False
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def _fc_list(returncode=0, stdout=""):
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"""Build a subprocess.run side effect mimicking fc-list output."""
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def _run(*args, **kwargs):
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return subprocess.CompletedProcess(args, returncode, stdout=stdout, stderr="")
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return _run
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def test_warns_when_no_windows_fonts(tmp_path, capsys, monkeypatch):
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monkeypatch.delenv("CLOAKBROWSER_SUPPRESS_FONT_WARNING", raising=False)
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with (
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patch("platform.system", return_value="Linux"),
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patch("subprocess.run", side_effect=_fc_list(0, "DejaVu Sans:style=Book")),
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patch("cloakbrowser.config.get_cache_dir", return_value=tmp_path),
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):
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browser._maybe_warn_windows_fonts(WIN_ARGS)
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assert MSG in capsys.readouterr().err
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assert (tmp_path / ".font_warning_shown").exists()
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def test_in_process_flag_blocks_second_call(tmp_path, capsys):
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with (
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patch("platform.system", return_value="Linux"),
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patch("subprocess.run", side_effect=_fc_list(0, "DejaVu")) as mrun,
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patch("cloakbrowser.config.get_cache_dir", return_value=tmp_path),
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):
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browser._maybe_warn_windows_fonts(WIN_ARGS)
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assert MSG in capsys.readouterr().err # first call warns (and drains buffer)
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browser._maybe_warn_windows_fonts(WIN_ARGS)
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assert MSG not in capsys.readouterr().err
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assert mrun.call_count == 1 # probe ran only once
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def test_marker_suppresses_across_processes(tmp_path, capsys):
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"""An existing marker (prior process) skips the warning even after a flag reset."""
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(tmp_path / ".font_warning_shown").write_text("")
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with (
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patch("platform.system", return_value="Linux"),
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patch("subprocess.run", side_effect=_fc_list(0, "DejaVu")),
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patch("cloakbrowser.config.get_cache_dir", return_value=tmp_path),
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):
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browser._maybe_warn_windows_fonts(WIN_ARGS)
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assert MSG not in capsys.readouterr().err
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def test_env_suppresses_and_writes_no_marker(tmp_path, capsys, monkeypatch):
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monkeypatch.setenv("CLOAKBROWSER_SUPPRESS_FONT_WARNING", "1")
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with (
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patch("platform.system", return_value="Linux"),
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patch("subprocess.run", side_effect=_fc_list(0, "")),
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patch("cloakbrowser.config.get_cache_dir", return_value=tmp_path),
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):
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browser._maybe_warn_windows_fonts(WIN_ARGS)
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assert MSG not in capsys.readouterr().err
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assert not (tmp_path / ".font_warning_shown").exists()
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def test_no_warn_on_non_linux(tmp_path, capsys):
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with (
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patch("platform.system", return_value="Darwin"),
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patch("cloakbrowser.config.get_cache_dir", return_value=tmp_path),
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):
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browser._maybe_warn_windows_fonts(WIN_ARGS)
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assert MSG not in capsys.readouterr().err
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def test_no_warn_when_platform_overridden(tmp_path, capsys):
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with (
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patch("platform.system", return_value="Linux"),
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patch("cloakbrowser.config.get_cache_dir", return_value=tmp_path),
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):
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browser._maybe_warn_windows_fonts(["--fingerprint-platform=linux"])
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assert MSG not in capsys.readouterr().err
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def test_no_warn_no_crash_when_fc_list_absent(tmp_path, capsys):
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with (
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patch("platform.system", return_value="Linux"),
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patch("subprocess.run", side_effect=FileNotFoundError()),
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patch("cloakbrowser.config.get_cache_dir", return_value=tmp_path),
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):
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browser._maybe_warn_windows_fonts(WIN_ARGS) # must not raise
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assert MSG not in capsys.readouterr().err
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assert not (tmp_path / ".font_warning_shown").exists()
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def test_no_warn_when_full_set_present(tmp_path, capsys):
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with (
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patch("platform.system", return_value="Linux"),
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patch("subprocess.run", side_effect=_fc_list(0, ALL_WIN_FONTS)),
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patch("cloakbrowser.config.get_cache_dir", return_value=tmp_path),
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):
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browser._maybe_warn_windows_fonts(WIN_ARGS)
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assert MSG not in capsys.readouterr().err
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def test_warns_on_partial_set(tmp_path, capsys):
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# Only 1 of the 8 tells present — strict check treats this as incomplete.
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listing = "/usr/share/fonts/segoeui.ttf: Segoe UI:style=Regular"
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with (
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patch("platform.system", return_value="Linux"),
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patch("subprocess.run", side_effect=_fc_list(0, listing)),
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patch("cloakbrowser.config.get_cache_dir", return_value=tmp_path),
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):
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browser._maybe_warn_windows_fonts(WIN_ARGS)
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assert MSG in capsys.readouterr().err
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