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302 lines (266 loc) · 11.5 KB
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// Copyright 2023 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "runtime/function_registry.h"
#include <cstdint>
#include <memory>
#include <tuple>
#include <vector>
#include "absl/status/status.h"
#include "absl/status/statusor.h"
#include "absl/types/span.h"
#include "common/function_descriptor.h"
#include "common/kind.h"
#include "common/value.h"
#include "internal/testing.h"
#include "runtime/activation.h"
#include "runtime/function.h"
#include "runtime/function_adapter.h"
#include "runtime/function_overload_reference.h"
#include "runtime/function_provider.h"
namespace cel {
namespace {
using ::absl_testing::StatusIs;
using ::cel::runtime_internal::FunctionProvider;
using ::testing::ElementsAre;
using ::testing::HasSubstr;
using ::testing::SizeIs;
using ::testing::Truly;
class ConstIntFunction : public cel::Function {
public:
static cel::FunctionDescriptor MakeDescriptor() {
return {"ConstFunction", false, {}};
}
absl::StatusOr<Value> Invoke(absl::Span<const Value> args,
const InvokeContext& context) const override {
return IntValue(42);
}
};
TEST(FunctionRegistryTest, InsertAndRetrieveLazyFunction) {
cel::FunctionDescriptor lazy_function_desc{"LazyFunction", false, {}};
FunctionRegistry registry;
Activation activation;
ASSERT_OK(registry.RegisterLazyFunction(lazy_function_desc));
const auto descriptors =
registry.FindLazyOverloads("LazyFunction", false, {});
EXPECT_THAT(descriptors, SizeIs(1));
}
// Confirm that lazy and static functions share the same descriptor space:
// i.e. you can't insert both a lazy function and a static function for the same
// descriptors.
TEST(FunctionRegistryTest, LazyAndStaticFunctionShareDescriptorSpace) {
FunctionRegistry registry;
cel::FunctionDescriptor desc = ConstIntFunction::MakeDescriptor();
ASSERT_OK(registry.RegisterLazyFunction(desc));
absl::Status status = registry.Register(ConstIntFunction::MakeDescriptor(),
std::make_unique<ConstIntFunction>());
EXPECT_FALSE(status.ok());
}
TEST(FunctionRegistryTest, FindStaticOverloadsReturns) {
FunctionRegistry registry;
cel::FunctionDescriptor desc = ConstIntFunction::MakeDescriptor();
ASSERT_OK(registry.Register(desc, std::make_unique<ConstIntFunction>()));
std::vector<cel::FunctionOverloadReference> overloads =
registry.FindStaticOverloads(desc.name(), false, {});
EXPECT_THAT(overloads,
ElementsAre(Truly(
[](const cel::FunctionOverloadReference& overload) -> bool {
return overload.descriptor.name() == "ConstFunction";
})))
<< "Expected single ConstFunction()";
}
TEST(FunctionRegistryTest, ListFunctions) {
cel::FunctionDescriptor lazy_function_desc{"LazyFunction", false, {}};
FunctionRegistry registry;
ASSERT_OK(registry.RegisterLazyFunction(lazy_function_desc));
EXPECT_OK(registry.Register(ConstIntFunction::MakeDescriptor(),
std::make_unique<ConstIntFunction>()));
auto registered_functions = registry.ListFunctions();
EXPECT_THAT(registered_functions, SizeIs(2));
EXPECT_THAT(registered_functions["LazyFunction"], SizeIs(1));
EXPECT_THAT(registered_functions["ConstFunction"], SizeIs(1));
}
TEST(FunctionRegistryTest, DefaultLazyProviderNoOverloadFound) {
FunctionRegistry registry;
Activation activation;
cel::FunctionDescriptor lazy_function_desc{"LazyFunction", false, {}};
EXPECT_OK(registry.RegisterLazyFunction(lazy_function_desc));
auto providers = registry.FindLazyOverloads("LazyFunction", false, {});
ASSERT_THAT(providers, SizeIs(1));
const FunctionProvider& provider = providers[0].provider;
ASSERT_OK_AND_ASSIGN(
std::optional<FunctionOverloadReference> func,
provider.GetFunction({"LazyFunc", false, {cel::Kind::kInt64}},
activation));
EXPECT_EQ(func, absl::nullopt);
}
TEST(FunctionRegistryTest, DefaultLazyProviderReturnsImpl) {
FunctionRegistry registry;
Activation activation;
EXPECT_OK(registry.RegisterLazyFunction(
FunctionDescriptor("LazyFunction", false, {Kind::kAny})));
EXPECT_TRUE(activation.InsertFunction(
FunctionDescriptor("LazyFunction", false, {Kind::kInt}),
UnaryFunctionAdapter<int64_t, int64_t>::WrapFunction(
[](int64_t x) { return 2 * x; })));
EXPECT_TRUE(activation.InsertFunction(
FunctionDescriptor("LazyFunction", false, {Kind::kDouble}),
UnaryFunctionAdapter<double, double>::WrapFunction(
[](double x) { return 2 * x; })));
auto providers =
registry.FindLazyOverloads("LazyFunction", false, {Kind::kInt});
ASSERT_THAT(providers, SizeIs(1));
const FunctionProvider& provider = providers[0].provider;
ASSERT_OK_AND_ASSIGN(
std::optional<FunctionOverloadReference> func,
provider.GetFunction(
FunctionDescriptor("LazyFunction", false, {Kind::kInt}), activation));
ASSERT_TRUE(func.has_value());
EXPECT_EQ(func->descriptor.name(), "LazyFunction");
EXPECT_EQ(func->descriptor.types(), std::vector{cel::Kind::kInt64});
}
TEST(FunctionRegistryTest, DefaultLazyProviderAmbiguousOverload) {
FunctionRegistry registry;
Activation activation;
EXPECT_OK(registry.RegisterLazyFunction(
FunctionDescriptor("LazyFunction", false, {Kind::kAny})));
EXPECT_TRUE(activation.InsertFunction(
FunctionDescriptor("LazyFunction", false, {Kind::kInt}),
UnaryFunctionAdapter<int64_t, int64_t>::WrapFunction(
[](int64_t x) { return 2 * x; })));
EXPECT_TRUE(activation.InsertFunction(
FunctionDescriptor("LazyFunction", false, {Kind::kDouble}),
UnaryFunctionAdapter<double, double>::WrapFunction(
[](double x) { return 2 * x; })));
auto providers =
registry.FindLazyOverloads("LazyFunction", false, {Kind::kInt});
ASSERT_THAT(providers, SizeIs(1));
const FunctionProvider& provider = providers[0].provider;
EXPECT_THAT(
provider.GetFunction(
FunctionDescriptor("LazyFunction", false, {Kind::kAny}), activation),
StatusIs(absl::StatusCode::kInvalidArgument,
HasSubstr("Couldn't resolve function")));
}
TEST(FunctionRegistryTest, CanRegisterNonStrictFunction) {
{
FunctionRegistry registry;
cel::FunctionDescriptor descriptor("NonStrictFunction",
/*receiver_style=*/false, {Kind::kAny},
/*is_strict=*/false);
ASSERT_OK(
registry.Register(descriptor, std::make_unique<ConstIntFunction>()));
EXPECT_THAT(
registry.FindStaticOverloads("NonStrictFunction", false, {Kind::kAny}),
SizeIs(1));
}
{
FunctionRegistry registry;
cel::FunctionDescriptor descriptor("NonStrictLazyFunction",
/*receiver_style=*/false, {Kind::kAny},
/*is_strict=*/false);
EXPECT_OK(registry.RegisterLazyFunction(descriptor));
EXPECT_THAT(registry.FindLazyOverloads("NonStrictLazyFunction", false,
{Kind::kAny}),
SizeIs(1));
}
}
using NonStrictTestCase = std::tuple<bool, bool>;
using NonStrictRegistrationFailTest = testing::TestWithParam<NonStrictTestCase>;
TEST_P(NonStrictRegistrationFailTest,
IfOtherOverloadExistsRegisteringNonStrictFails) {
bool existing_function_is_lazy, new_function_is_lazy;
std::tie(existing_function_is_lazy, new_function_is_lazy) = GetParam();
FunctionRegistry registry;
cel::FunctionDescriptor descriptor("OverloadedFunction",
/*receiver_style=*/false, {Kind::kAny},
/*is_strict=*/true);
if (existing_function_is_lazy) {
ASSERT_OK(registry.RegisterLazyFunction(descriptor));
} else {
ASSERT_OK(
registry.Register(descriptor, std::make_unique<ConstIntFunction>()));
}
cel::FunctionDescriptor new_descriptor("OverloadedFunction",
/*receiver_style=*/false,
{Kind::kAny, Kind::kAny},
/*is_strict=*/false);
absl::Status status;
if (new_function_is_lazy) {
status = registry.RegisterLazyFunction(new_descriptor);
} else {
status =
registry.Register(new_descriptor, std::make_unique<ConstIntFunction>());
}
EXPECT_THAT(status, StatusIs(absl::StatusCode::kAlreadyExists,
HasSubstr("Only one overload")));
}
TEST_P(NonStrictRegistrationFailTest,
IfOtherNonStrictExistsRegisteringStrictFails) {
bool existing_function_is_lazy, new_function_is_lazy;
std::tie(existing_function_is_lazy, new_function_is_lazy) = GetParam();
FunctionRegistry registry;
cel::FunctionDescriptor descriptor("OverloadedFunction",
/*receiver_style=*/false, {Kind::kAny},
/*is_strict=*/false);
if (existing_function_is_lazy) {
ASSERT_OK(registry.RegisterLazyFunction(descriptor));
} else {
ASSERT_OK(
registry.Register(descriptor, std::make_unique<ConstIntFunction>()));
}
cel::FunctionDescriptor new_descriptor("OverloadedFunction",
/*receiver_style=*/false,
{Kind::kAny, Kind::kAny},
/*is_strict=*/true);
absl::Status status;
if (new_function_is_lazy) {
status = registry.RegisterLazyFunction(new_descriptor);
} else {
status =
registry.Register(new_descriptor, std::make_unique<ConstIntFunction>());
}
EXPECT_THAT(status, StatusIs(absl::StatusCode::kAlreadyExists,
HasSubstr("Only one overload")));
}
TEST_P(NonStrictRegistrationFailTest, CanRegisterStrictFunctionsWithoutLimit) {
bool existing_function_is_lazy, new_function_is_lazy;
std::tie(existing_function_is_lazy, new_function_is_lazy) = GetParam();
FunctionRegistry registry;
cel::FunctionDescriptor descriptor("OverloadedFunction",
/*receiver_style=*/false, {Kind::kAny},
/*is_strict=*/true);
if (existing_function_is_lazy) {
ASSERT_OK(registry.RegisterLazyFunction(descriptor));
} else {
ASSERT_OK(
registry.Register(descriptor, std::make_unique<ConstIntFunction>()));
}
cel::FunctionDescriptor new_descriptor("OverloadedFunction",
/*receiver_style=*/false,
{Kind::kAny, Kind::kAny},
/*is_strict=*/true);
absl::Status status;
if (new_function_is_lazy) {
status = registry.RegisterLazyFunction(new_descriptor);
} else {
status =
registry.Register(new_descriptor, std::make_unique<ConstIntFunction>());
}
EXPECT_OK(status);
}
INSTANTIATE_TEST_SUITE_P(NonStrictRegistrationFailTest,
NonStrictRegistrationFailTest,
testing::Combine(testing::Bool(), testing::Bool()));
} // namespace
} // namespace cel
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