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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.
package dev.cel.checker;
import static com.google.common.truth.Truth.assertThat;
import dev.cel.expr.Type;
import dev.cel.expr.Type.PrimitiveType;
import dev.cel.common.types.CelKind;
import dev.cel.common.types.CelProtoTypes;
import dev.cel.common.types.CelType;
import dev.cel.common.types.SimpleType;
import java.util.HashMap;
import java.util.Map;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
@RunWith(JUnit4.class)
public class TypesTest {
@Test
public void isAssignable_usingProtoTypes() {
Map<Type, Type> subs = new HashMap<>();
Type typeParamA = CelProtoTypes.createTypeParam("A");
Type stringType = CelProtoTypes.create(PrimitiveType.STRING);
Map<Type, Type> result = Types.isAssignable(subs, typeParamA, stringType);
assertThat(result).containsExactly(typeParamA, stringType);
}
@Test
public void isAssignable_usingCustomTypes() {
Map<CelType, CelType> subs = new HashMap<>();
CelType intType = SimpleType.INT;
CelType customType = new CustomCelType();
// A curated example where a CEL's int type can be assigned to a custom type.
assertThat(Types.isAssignable(subs, intType, customType)).isEqualTo(subs);
// But not the other way around.
assertThat(Types.isAssignable(subs, customType, intType)).isNull();
}
private static final class CustomCelType extends CelType {
@Override
public CelKind kind() {
return CelKind.INT;
}
@Override
public String name() {
return "customInt";
}
@Override
public boolean isAssignableFrom(CelType other) {
return super.isAssignableFrom(other) || other.equals(SimpleType.INT);
}
}
}