253 lines
10 KiB
Python
253 lines
10 KiB
Python
"""No-device flows: launch-health verdicts, log parsing, tombstone parsing.
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Everything here runs on a bare checkout. The device commands are intercepted, so
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what is being tested is the *decision logic* -- which is exactly the part that a
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device test would otherwise hide behind "it looked fine on screen".
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"""
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from __future__ import annotations
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import sys
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import pytest
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from conftest import load_script, run_script
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install_test = load_script("install_test.py")
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coldstart = load_script("coldstart.py")
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native_crash = load_script("native_crash.py")
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pytestmark = pytest.mark.integration
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TOMBSTONE = "tombstone_sample.txt"
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LOGCAT = "logcat_sample.txt"
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# --------------------------------------------------------------------------- #
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# install_test.py: the two-sample pid verdict
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# --------------------------------------------------------------------------- #
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def drive(monkeypatch, pids, log="", capsys=None):
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"""Run install_test.main() with the device replaced by a scripted responder.
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`pids` is consumed in order by successive `pidof` calls, which is the whole
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point of the check: one sample cannot tell a running app from a crash loop.
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"""
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pids = list(pids)
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calls = []
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def fake_adb(args, serial=None, timeout=600):
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calls.append(list(args))
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if list(args)[:1] == ["logcat"] and "-d" in args:
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return log
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return ""
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def fake_sh(cmd, serial=None):
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calls.append(cmd)
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if cmd.startswith("pidof"):
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return pids.pop(0) if pids else ""
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if "mCurrentFocus" in cmd:
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return "mCurrentFocus=Window{a1b2 u0 com.example.app/.MainActivity}"
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return ""
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monkeypatch.setattr(install_test, "adb", fake_adb)
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monkeypatch.setattr(install_test, "sh", fake_sh)
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monkeypatch.setattr(install_test.time, "sleep", lambda _s: None)
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monkeypatch.setattr(sys, "argv", [
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"install_test.py", "--apk", "out/app.apk", "--pkg", "com.example.app",
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"--activity", ".MainActivity",
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])
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return install_test.main(), calls
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class TestLaunchHealthVerdict:
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def test_a_stable_pid_with_no_fatal_signature_is_ok(self, monkeypatch, capsys):
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code, calls = drive(monkeypatch, ["1234", "1234"])
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assert code == 0, capsys.readouterr().out
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def test_a_changed_pid_is_a_failure_even_though_the_app_is_running(self, monkeypatch, capsys):
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"""The measured shape of a crash loop: alive at the first sample, restarted by the second."""
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code, _calls = drive(monkeypatch, ["1234", "5678"])
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out = capsys.readouterr().out
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assert code == 1
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assert "pid @+6s : 1234" in out
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assert "5678" in out
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def test_a_dead_app_is_a_failure(self, monkeypatch, capsys):
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code, _calls = drive(monkeypatch, ["", ""])
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assert code == 1
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assert "(dead)" in capsys.readouterr().out
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def test_a_fatal_signature_fails_even_with_a_stable_pid(self, monkeypatch, capsys):
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"""Stability is not health: a caught-but-fatal error still fails the check."""
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code, _calls = drive(monkeypatch, ["1234", "1234"],
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log="01-01 10:00:01 E AndroidRuntime: FATAL EXCEPTION: main\n")
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assert code == 1
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assert "FATAL EXCEPTION" in capsys.readouterr().out
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def test_both_pid_samples_are_actually_taken(self, monkeypatch, capsys):
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_code, calls = drive(monkeypatch, ["1234", "1234"])
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capsys.readouterr()
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pidof_calls = [c for c in calls if isinstance(c, str) and c.startswith("pidof")]
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assert len(pidof_calls) == 2, "the second sample is what catches a crash loop"
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def test_the_launch_uses_the_package_slash_activity_component(self, monkeypatch, capsys):
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_code, calls = drive(monkeypatch, ["1234", "1234"])
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capsys.readouterr()
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assert any("am start -n com.example.app/.MainActivity" == c for c in calls
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if isinstance(c, str))
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# --------------------------------------------------------------------------- #
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# coldstart.py: logcat signal counting
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# --------------------------------------------------------------------------- #
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class TestLogcatSignalCounting:
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@pytest.fixture
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def counts(self, fixtures_dir):
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path = fixtures_dir / LOGCAT
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assert path.exists(), "the logcat fixture is missing from tests/fixtures"
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return coldstart.signal_counts(str(path), coldstart.SIGNAL_PATTERNS)
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@pytest.mark.parametrize("name,expected", [
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("FATAL EXCEPTION", 1),
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("VerifyError", 1),
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("Bad checksum", 1),
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("ANR", 1),
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("Displayed", 1),
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("IncompatibleClassChangeError", 0),
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("ClassNotFoundException", 0),
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("uncaughtException", 0),
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("am_crash", 0),
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])
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def test_counts(self, counts, name, expected):
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assert counts[name] == expected
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def test_every_pattern_in_the_table_is_reported(self, counts):
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assert set(counts) == set(coldstart.SIGNAL_PATTERNS)
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def test_a_missing_log_yields_no_counts_rather_than_raising(self, tmp_path):
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assert coldstart.signal_counts(str(tmp_path / "nope.txt"),
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coldstart.SIGNAL_PATTERNS) == {}
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def test_the_displayed_pattern_captures_the_milliseconds(self):
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import re
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match = re.search(coldstart.SIGNAL_PATTERNS["Displayed"],
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"I ActivityManager: Displayed com.example.app/.MainActivity: +842ms")
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assert match is not None
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assert match.group(1) == "842"
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# --------------------------------------------------------------------------- #
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# native_crash.py: tombstone parsing
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# --------------------------------------------------------------------------- #
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@pytest.fixture
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def crash(fixtures_dir):
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text = (fixtures_dir / TOMBSTONE).read_text(encoding="utf-8")
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crashes = native_crash.parse(text)
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assert len(crashes) == 1, "the fixture holds exactly one crash block"
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return crashes[0]
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class TestTombstoneParsing:
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def test_signal_and_code(self, crash):
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assert crash["signal"] == 11
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assert crash["signame"] == "SIGSEGV"
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assert crash["si_code"] == "SEGV_MAPERR"
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assert crash["fault"] == "0x0000000000000010"
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def test_process_identity_is_picked_up(self, crash):
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assert crash["pid"] == "12345"
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assert crash["tid"] == "12345"
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assert crash["proc"] == "com.example.app"
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def test_uptime_and_cause(self, crash):
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assert crash["uptime"] == "5"
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assert "null pointer" in crash["cause"]
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def test_backtrace_frames_are_complete(self, crash):
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assert len(crash["frames"]) == 4
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assert crash["frames"][0]["path"].endswith("libfoo.so")
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assert crash["frames"][0]["symbol"] == ""
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assert crash["frames"][1]["symbol"] == "Java_com_example_app_Native_check+120"
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assert crash["frames"][2]["path"].startswith("/apex/")
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assert crash["frames"][2]["symbol"] == "__pthread_start+256"
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def test_registers_are_collected_from_the_dump_line(self, crash):
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assert crash["regs"]["x0"] == 0x10
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assert crash["regs"]["x1"] == 0x7A12345678
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assert crash["regs"]["sp"] == 0x7FFABC1110
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assert crash["regs"]["lr"] == 0x7A11112222
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def test_the_pc_key_is_overwritten_by_the_last_backtrace_frame(self, crash):
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"""Measured behaviour, recorded rather than smoothed over.
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Register extraction scans every line of the block with one permissive
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pattern, so a `#NN pc <hex>` backtrace line also matches and the last one
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wins. The register dump's own `pc 0000007a111128cc` is therefore not what
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`regs['pc']` holds. It is a reporting wart, not a wrong verdict -- but it
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is a wart, so it is pinned here and listed in the harness report.
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"""
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assert crash["regs"]["pc"] == 0x55488, "the last frame's pc"
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assert crash["regs"]["pc"] != 0x7A111128CC, "the register dump's pc"
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def test_empty_input_produces_no_crashes(self):
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assert native_crash.parse("") == []
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def test_a_log_without_a_signal_line_produces_no_crashes(self):
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assert native_crash.parse("I/whatever: nothing to see\n") == []
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class TestLibraryClassification:
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@pytest.mark.parametrize("path,expected", [
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("/apex/com.android.runtime/lib64/bionic/libc.so", True),
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("/system/lib64/libart.so", True),
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("/vendor/lib64/libqcom.so", True),
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("/data/dalvik-cache/arm64/system@framework@boot.oat", True),
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("/data/app/~~AbCdEf==/com.example.app-1/lib/arm64/libfoo.so", False),
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("/data/local/tmp/libpayload.so", False),
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])
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def test_classification(self, path, expected):
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assert native_crash.is_system_lib(path) is expected
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def test_a_bare_name_is_treated_as_system(self):
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"""Measured behaviour: a path that is not absolute cannot be attributed to the app."""
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assert native_crash.is_system_lib("libfoo.so") is True
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class TestVerdictHint:
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def test_a_small_fault_address_held_in_a_register_is_flagged_as_arranged(self, crash):
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hints = " ".join(native_crash.verdict_hint(crash))
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assert "small integer" in hints
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assert "ARRANGED" in hints
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assert "x0" in hints
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def test_an_ordinary_null_dereference_gets_no_arranged_hint(self):
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ordinary = {"fault": "0x0", "regs": {"x1": 0x7A111128CC}, "signame": "SIGSEGV"}
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hints = native_crash.verdict_hint(ordinary)
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assert any("small integer" in h for h in hints)
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assert not any("ARRANGED" in h for h in hints)
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def test_sigkill_is_called_out_as_a_deliberate_termination(self):
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hints = native_crash.verdict_hint({"fault": "0x0", "regs": {}, "signame": "SIGKILL"})
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assert any("deliberate termination" in h for h in hints)
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class TestNativeCrashCli:
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def test_the_fixture_tombstone_is_parsed_by_the_cli(self, fixtures_dir):
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result = run_script("native_crash.py", [str(fixtures_dir / TOMBSTONE)], timeout=120)
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assert not result.timed_out
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assert not result.has_traceback, result.output
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assert result.returncode == 0, result.output
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assert "libfoo.so" in result.stdout
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assert "SIGSEGV" in result.stdout
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def test_a_missing_log_is_reported_without_a_traceback(self, tmp_path):
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result = run_script("native_crash.py", [str(tmp_path / "absent.txt")])
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assert not result.has_traceback, result.output
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assert result.returncode != 0
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assert "no such file" in result.output
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def test_a_malformed_lib_spec_is_refused(self, fixtures_dir):
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result = run_script("native_crash.py",
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[str(fixtures_dir / TOMBSTONE), "--lib", "notapair"])
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assert result.returncode != 0
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assert "NAME=PATH" in result.output
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