Bug: n/a
Test: n/a
Change-Id: I3c359283b8efa04d0731018c0d6647586221f8cc

We should minimize uses of it, but once in a while,
it's useful as a last resort.

Bug: 340556010
Test: atest FrameworksCoreTestsRavenwood:com.android.internal.ravenwood.RavenwoodEnvironmentTest
Test: tree hugger for device side tests
Merged-In: Ice651a55cad092514466dd56940a2cf7b2285e4e
Change-Id: Ice651a55cad092514466dd56940a2cf7b2285e4e

As test authors onboard their bivalent tests, they'll be using the
`@IgnoreUnderRavenwood` annotation to quietly ignore tests that
don't currently have enough Ravenwood support to run.

However, over time the Ravenwood environment will continue to
gain new functionality, and we'd like an easy way to "probe" those
previously-ignored tests to see if any of them started passing.

This change implements this using a locally-configured flag
that unconditionally runs all tests under Ravenwood, and reports
failures for any tests marked as `@IgnoreUnderRavenwood` that
are now passing.  (As these "failures" might be confusing for normal
test authors, we leave it disabled by default in the build, and
leave it for internal Ravenwood maintainers.)

To confirm this works, implement two new methods on Parcel, and
detect the relevant tests that started passing.

Bug: 292141694
Test: atest CtsUtilTestCasesRavenwood CtsUtilTestCases
Change-Id: Ied2a5e3d1781c76a4f3506192d015309f2f424b2

* Highlight temporary strategies for JNI.
* Clarify current `TEST_MAPPING` status.
* Mention `@IgnoreUnderRavenwood` support at class level.
* Mention strategy for bivalent tests using resources.
* Concrete example of temporary directory.

Bug: 292141694
Test: atest CtsUtilTestCasesRavenwood CtsUtilTestCases
Change-Id: If0903296697049d248c50ab46b01b273aab26c9f

Bug: 314797745
Test: atest PowerStatsTestsRavenwood
Test: atest PowerStatsTests

Change-Id: I4af6e9c532285dc935f6d2156cc9cb3531d9aeaa

Tests for these internal utils are local within the frameworks/base/
repo, instead of in CTS.

To help future-proof, bring the entire os/* test directory by
default into the Ravenwood suites, and give developers the way to
easily opt-out with @IgnoreUnderRavenwood at the class level.

Bug: 292141694
Test: atest FrameworksCoreTestsRavenwood FrameworksCoreTests
Change-Id: Ia3c72c22fb3ebc8cfec7a4f9811b7e27a783e885

Bug: 314797745
Test: atest PowerStatsTestsRavenwood
Test: atest PowerStatsTests

Change-Id: I28f823608041cc7606bd848f3618c9c0ae5adace

Since feature flags are becoming an important part of development
work, ensure that Ravenwood tests can use existing tools such as
`SetFlagsRule` to populate values for code-under-test to consume.

To enable this, we extend `AndroidHeuristicsFilter` to recognize
feature flags generated code, and include that in the Ravenwood
environment by default.

Bug: 311370221
Test: atest FrameworksCoreTestsRavenwood FrameworksCoreTests
Change-Id: I526af65f816d153cb6e365cf6810a5a304d3e6a6

This change demonstrates a moderately complex test of a specific
system service, in this case `UriGrantsManagerService`.

Bug: 292141694
Test: atest FrameworksServicesTestsRavenwood FrameworksServicesTests
Change-Id: Ia16632f2c9a1e24deb9c1320fdbb1c099e3d74c3

Tests for these internal utils are local within the frameworks/base/
repo, instead of in CTS.

To help future-proof, bring the entire utils/* test directory by
default into the Ravenwood suites, and give developers the way to
easily opt-out with @IgnoreUnderRavenwood at the class level.

Bug: 292141694
Test: atest FrameworksCoreTestsRavenwood FrameworksCoreTests
Test: atest FrameworksUtilTestsRavenwood FrameworksUtilTests
Change-Id: Ibcabec764efa31cc8cb4c56d7815948d4029aaea

Tests for these internal utils are local within the frameworks/base/
repo, instead of in CTS.

To help future-proof, bring the entire utils/* test directory by
default into the Ravenwood suites, and give developers the way to
easily opt-out with @IgnoreUnderRavenwood at the class level.

Bug: 292141694
Test: atest FrameworksCoreTestsRavenwood FrameworksCoreTests
Test: atest FrameworksUtilTestsRavenwood FrameworksUtilTests
Change-Id: I5251dca752396faa77774659d0923d8cdb719830

Bug: 292141694
Test: ./scripts/run-all-tests.sh
Change-Id: If16c9abaeeefbf68acac0f90d8ef394871ce542a

Many tests across the OS are already writing tests where they "mock"
their own responses from `PackageManager`, primarily by filling in
the "info" objects that it returns.

Since these are simple data structures that primarily hold static
data, let's opt-in under Ravenwood, so that other tests can
construct for their own internal uses.  Complex dynamic operations,
such as loading drawables, remain opted-out.

This change brings along relevant CTS, but ignores several tests that
currently depend on a fully-running PackageManager service.  To
ensure we have solid coverage, new `testSimple` is added.

Bug: 292141694
Test: atest CtsContentTestCasesRavenwood
Change-Id: Ie9682184cb5250f649426947bcf353802918ce50

This helps examine what ravenwood test jars contain.

Currently it's rather large:

$ ll $ANDROID_HOST_OUT/testcases/RavenwoodMinimumTest/RavenwoodMinimumTest.jar
-rw-r--r-- 1 omakoto primarygroup 2705929 Dec  1 11:06 /android/main-without-vendor/out/host/linux-x86/testcases/RavenwoodMinimumTest/RavenwoodMinimumTest.jar

$ jar tvf $ANDROID_HOST_OUT/testcases/RavenwoodMinimumTest/RavenwoodMinimumTest.jar | wc -l
2000

Seems like we're pulling in even kotlin runtime classes from the
androidx dependencies?

We can move them to ravenwood-runtime.

Bug: 292141694
Test: atest --host RavenwoodMinimumTest

Change-Id: Ifb939c9914ef7fa6610adb697d05369d16c76d29

Bug: 292141694
Test: Tree hugger
Change-Id: Ica5cfff6bc209376ab39f665d48f992c143c49a2

General-purpose library code, along with tests.  Part of preparing
to onboard `PackageManager` info objects.

Bug: 292141694
Test: atest InternalTestsRavenwood
Change-Id: Idc0000151cac14bc03b4ca9bfa3000d582ee1602

As part of upcoming `servicestests` work, this change makes some
general changes.

We don't currently have Mainline stubs included in the Ravenwood
runtime, so this change "hides" references in `PackageManagerInternal`
and `ActivityManagerInternal` while keeping the clients working.

Adds support for `Process.setCanSelfBackground()` to support
ServiceThread.

Adds support for `LocalServices`, along with a new hook to clear out
any registered services between each Ravenwood test.

Bug: 292141694
Test: atest CtsUtilTestCasesRavenwood
Change-Id: Iea3b4a5bf2ebebb34d56cfc76014fc07987cf355

Another common utility that is valuable, along with relevant tests.

Bug: 292141694
Test: atest CtsUtilTestCasesRavenwood:LruCacheTest CtsUtilTestCases:LruCacheTest
Change-Id: Ic2212518a61287fe1e4782075c8df20fed24f6d0

These are common utility classes used by framework code, so support
them and their relevant tests.

Since they depend on ErrnoException and IoUtils, bring over limited
versions of those classes into `libcore-fake`, and compile them into
the Ravenwood runtime using variant washing.

Bug: 292141694
Test: atest FrameworksCoreTestsRavenwood FrameworksUtilTestsRavenwood
Change-Id: Ib44dedacfa4d12a7d697973caf070477ed07202d

See below for the log filename.

Also disable an unimplemented flag.

Bug: 311174191
Test: ./scripts/run-all-tests.sh
Test: m framework-minus-apex.ravenwood
    and examine console output and
    out/soong/.intermediates/frameworks/base/framework-minus-apex.ravenwood-base/android_common/gen/hoststubgen_framework-minus-apex.log
Change-Id: I9997370c93e2fe90276d5f3e657d45d440ca0a59

Even though developers are encouraged to use Mockito, existing tests
may still be using this old library for their mocking.

We'll circle back later to consider support for components such as
ContentProvider, Service, etc.

Clean up OWNERS.

Bug: 310268946
Test: atest android.test.mock.ravenwood.tests
Change-Id: Ie3f4ccea9cf6719d61cff277a627825868edc992

Bug: 292141694
Test: none
Change-Id: Iaa8b163bf0700fa6ef5c9ef5e022b68c1a932273

Also fix the AIDL class detection.

Test: m framework-minus-apex.ravenwood and make sure IAccountAthenticator
  and its nested classes are all kept.
Test: ./run-all-tests.sh
Change-Id: Idb870a6e7558f7303a2072afbede2a868204e2bf

Bug: 292141694
Test: atest CtsUtilTestCasesRavenwood
Change-Id: I4068c227b4d42b34d2a7e1e5da2032a870b3cfc2

Now that we have a solid foundation of classes available, one of the
tricker pieces is supporting Handler/Looper under Ravenwood.  At its
core, the native implementation of MessageQueue can be emulated using
core JVM primitives, which is enough to reliably pass CTS.

Advanced features like FileDescriptor events will need to wait until
we eventually have real JNI support.

Fix obscure bug with SystemClock; must be positive number.  Always
start our "fake" pointers from 1 to prevent `nullptr` oddness.

Bug: 292141694
Test: atest-dev CtsOsTestCasesRavenwood CtsOsTestCases
Change-Id: I0f82b659973443968ef2609a7e3151f381abff29

Insets, Point, PointF, Rect, and RectF are all foundational structs
that don't rely on any complex logic, so they're prime candidates to
support for use by Ravenwood host-side tests.

Based on analysis of existing test code, they're also high-usage
classes that would help enable many "small" tests.

Bug: 292141694
Test: atest CtsGraphicsTestCasesRavenwood CtsGraphicsTestCases
Change-Id: I715d7e03187d651c506bd540e4d1735d56c27ec8

Support single simple tuple class in Ravenwood.

Bug: 292141694
Test: atest-dev CtsAccountManagerTestCasesRavenwood CtsAccountManagerTestCases
Change-Id: I877cce30d180e87c9715391fb488bc7313156bea

Internal test authors are likely going to want to use internal
utilities that aren't in the official API surface.  This change adds
those to Ravenwood, along with local tests to confirm they work.

Bug: 292141694
Test: atest-dev FrameworksUtilTestsRavenwood
Change-Id: I0f4df50416d153418d4525bd8ec5c4dbf04521a2

A handful of TextUtils utility methods are fully supportable on a
typical host JVM, so this change marks them as being available.  It
also brings along the relevant CTS to ensure consistency with how
a real device behaves.

Bug: 292141694
Test: atest-dev CtsTextTestCasesRavenwood CtsTextTestCases
Change-Id: I460719c67ac4bde9e8baee0ac72d3062401d7d67

Some CTS tests desire to link against `test_current` to prove to
themselves that they're not touching hidden APIs.  This means if they
also want to use our `ravenwood-junit` rules, that dependency also
needs to link against `test_current`.

Since we're reaching down into plenty of hidden details when we're
actually running on a Ravenwood runtime, we split into a `stub` and
an `impl` library, so that we give a cleanly compiling library to
to clients, which is then replaced under the Ravenwood runtime.

Bug: 292141694
Test: atest-dev CtsTextTestCasesRavenwood CtsTextTestCases
Change-Id: I96dbc9643324a7853a992e97b51a88f70eb721f3

To aid future auditing, and determining which tests might be
ready to enable, support adding blockedBy and/or reason to
the @IgnoreUnderRavenwood annotation.  Apply to most of our
existing usages in tests.

Bug: 292141694
Test: atest-dev CtsUtilTestCasesRavenwood CtsProtoTestCasesRavenwood CtsOsTestCasesRavenwood CtsContentTestCasesRavenwood CtsDatabaseTestCasesRavenwood
Change-Id: I8807c44013f8f029844de641b43804ecf3766acb

Initial pass at foundational classes under android.database, along
with CTS to verify consistency.

Unfortunately much of the CTS is structured as integration tests,
when it'd be possible to verify behavior as unit tests using
simpler tools like MatrixCursor.  This change makes an effort at
supporting existing tests using MatrixCursor where simple to adapt,
but future changes will likely need to add more dedicated coverage.

Bug: 292141694
Test: atest-dev CtsDatabaseTestCasesRavenwood CtsDatabaseTestCases
Change-Id: I63c568fc2bcb9d7c1ac1f2a251442fec44a0d19a

Initial pass at foundational classes under android.content, along
with CTS to verify consistency.

Methods that interface to broader parts of OS remain marked as
"throw" for the moment, such as cross-process work and StrictMode.

Bug: 292141694
Test: atest-dev CtsOsTestCasesRavenwood CtsOsTestCases
Test: atest-dev CtsContentTestCasesRavenwood CtsContentTestCases
Change-Id: Ic3deafb1f4058fcc104882a3508728994669f7d2

We have the XML interfaces from libcore, but the implementations
there are tied closely to things like StringPool.  We thankfully
have our own human-readable XML serializer that we could use, but
there's unfortunately not a good pull parser.

To get us unstuck for the moment, pivot the internals to
unconditionally use the binary XML format, which at least we
know is thoroughly tested, and any data written through this path
can then also be parsed.

This is enough to support PersistableBundle, and we'll circle back
to get ourselves a human-readable XML implementation in the future.

Bug: 292141694
Test: atest-dev CtsOsTestCasesRavenwood CtsOsTestCases
Change-Id: I875a3a2b0e95e52861afe187e2a5e9f1e740d8d5

Bring along simple UID math utility methods, and the ability to
detect 32-vs-64-bit environments.

Bug: 292141694
Test: atest-dev CtsOsTestCasesRavenwood CtsOsTestCases
Change-Id: I5f3841dbe5cae703facc9020ba8c5405aa3ebcae

Test: atest RavenwoodMockitoTest RavenwoodMockitoTest_device
Bug: 310268946
Bug: 292141694
Change-Id: Iaf0f689d5513a1a4dce4d756aad2152202d72e6d

The Ravenwood environment doesn't support IPC, but much of the code
that developers intend to test (such as AIDL stubs) still relies on
baseline same-process behavior to be intact.

This change adds UID and PID support to Process and Binder, but we
carefully communicate that it's only available when the test author
has configured it via a RavenwoodRule.  This ensures that tests
don't accidentally rely on unexpected defaults, as some tests will
want AID_SYSTEM, and others want a normal app UID.

Also bring along SystemClock, PatternMatcher, and ParcelUuid
along with relevant tests.

Finally, now that we have an IgnoreUnderRavenwood annotation, we
can pivot back our default failure to be a RuntimeException instead
of an AssumptionViolatedException.

Bug: 292141694
Test: atest-dev CtsOsTestCasesRavenwood CtsOsTestCases
Change-Id: I5f54c3179b2d305b9ab9144c43fd063c6b756e44

Test: atest RavenwoodMockitoTest
Bug: 310268946
Bug: 292141694

Change-Id: I6021e67e12c60b00c54638f43c75350b0d11f0a7

These inline annotations make maintenance commitments easier for
code owners to reason about.

Bug: 292141694
Test: atest-dev CtsUtilTestCasesRavenwood CtsUtilTestCases
Change-Id: Ia3479c7fd66123e2cc759c661fc551967ecdec08

Also add some presubmit tests as a smoke test.

Bug: 292141694
Test: run-all-tests.sh
Test: atest --no-bazel-mode CtsUtilTestCasesRavenwood

Change-Id: I30569313b764dfa30db9c2c5627050da4a6a1d67