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// Copyright 2022 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.parser;
import static com.google.common.truth.Truth.assertThat;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import com.google.testing.junit.testparameterinjector.TestParameterInjector;
import com.google.testing.junit.testparameterinjector.TestParameters;
import dev.cel.common.ast.CelExpr;
import dev.cel.common.ast.CelExpr.CelCall;
import java.util.Optional;
import org.junit.Test;
import org.junit.runner.RunWith;
@RunWith(TestParameterInjector.class)
public final class OperatorTest {
@Test
public void find_returnsEmptyWhenNotFound() {
assertThat(Operator.find("has")).isEmpty();
}
@Test
public void find_returnsCorrectOperator() {
assertThat(Operator.find("+")).hasValue(Operator.ADD);
}
@Test
public void findReverse_returnsEmptyWhenNotFound() {
assertThat(Operator.findReverse("+")).isEmpty();
}
@Test
public void findReverse_returnsCorrectOperator() {
assertThat(Operator.findReverse("_+_")).hasValue(Operator.ADD);
}
@Test
public void findReverseBinaryOperator_returnsEmptyWhenNotFound() {
assertThat(Operator.findReverseBinaryOperator("+")).isEmpty();
}
@Test
public void findReverseBinaryOperator_returnsEmptyForUnaryOperator() {
assertThat(Operator.findReverse("-_")).hasValue(Operator.NEGATE);
assertThat(Operator.findReverseBinaryOperator("-_")).isEmpty();
assertThat(Operator.findReverse("!_")).hasValue(Operator.LOGICAL_NOT);
assertThat(Operator.findReverseBinaryOperator("!_")).isEmpty();
}
@Test
public void findReverseBinaryOperator_returnsCorrectOperator() {
assertThat(Operator.findReverseBinaryOperator("_+_")).hasValue(Operator.ADD);
}
@Test
@TestParameters({
"{operator: '_?_:_', value: 8}",
"{operator: '_||_', value: 7}",
"{operator: '_&&_', value: 6}",
"{operator: '_==_', value: 5}",
"{operator: '_>_', value: 5}",
"{operator: '_>=_', value: 5}",
"{operator: '@in', value: 5}",
"{operator: '_<_', value: 5}",
"{operator: '_<=_', value: 5}",
"{operator: '_!=_', value: 5}",
"{operator: '_+_', value: 4}",
"{operator: '_-_', value: 4}",
"{operator: '_/_', value: 3}",
"{operator: '_%_', value: 3}",
"{operator: '_*_', value: 3}",
"{operator: '!_', value: 2}",
"{operator: '-_', value: 2}",
"{operator: '_[_]', value: 1}",
"{operator: 'has', value: 0}",
})
public void lookupPrecedence(String operator, int value) {
assertEquals(Operator.lookupPrecedence(operator), value);
}
@Test
@TestParameters({
"{operator: '-_', value: '-'}",
"{operator: '!_', value: '!'}",
})
public void lookupUnaryOperator_nonEmpty(String operator, String value) {
assertEquals(Operator.lookupUnaryOperator(operator), Optional.of(value));
}
@Test
@TestParameters({
"{operator: '_*_'}",
"{operator: '_[_]'}",
"{operator: '_&&_'}",
})
public void lookupUnaryOperator_empty(String operator) {
assertEquals(Operator.lookupUnaryOperator(operator), Optional.empty());
}
@Test
@TestParameters({
"{operator: '_||_', value: '||'}",
"{operator: '_&&_', value: '&&'}",
"{operator: '_==_', value: '=='}",
"{operator: '_>_', value: '>'}",
"{operator: '_>=_', value: '>='}",
"{operator: '@in', value: 'in'}",
"{operator: '_<_', value: '<'}",
"{operator: '_<=_', value: '<='}",
"{operator: '_!=_', value: '!='}",
"{operator: '_+_', value: '+'}",
"{operator: '_-_', value: '-'}",
"{operator: '_/_', value: '/'}",
"{operator: '_%_', value: '%'}",
"{operator: '_*_', value: '*'}",
})
public void lookupBinaryOperator_nonEmpty(String operator, String value) {
assertEquals(Operator.lookupBinaryOperator(operator), Optional.of(value));
}
@Test
@TestParameters({
"{operator: '!_'}",
"{operator: '-_'}",
"{operator: '_[_]'}",
"{operator: 'has'}",
})
public void lookupBinaryOperator_empty(String operator) {
assertEquals(Operator.lookupBinaryOperator(operator), Optional.empty());
}
@Test
@TestParameters({
"{operator1: '_[_]', operator2: '_&&_'}",
"{operator1: '_&&_', operator2: '_||_'}",
"{operator1: '_||_', operator2: '_?_:_'}",
"{operator1: '!_', operator2: '_*_'}",
"{operator1: '_==_', operator2: '_&&_'}",
"{operator1: '_!=_', operator2: '_?_:_'}",
})
public void operatorLowerPrecedence(String operator1, String operator2) {
CelExpr expr =
CelExpr.newBuilder().setCall(CelCall.newBuilder().setFunction(operator2).build()).build();
assertTrue(Operator.isOperatorLowerPrecedence(operator1, expr));
}
@Test
@TestParameters({
"{operator1: '_?_:_', operator2: '_&&_'}",
"{operator1: '_&&_', operator2: '_[_]'}",
"{operator1: '_||_', operator2: '!_'}",
"{operator1: '!_', operator2: '-_'}",
"{operator1: '_==_', operator2: '_!=_'}",
"{operator1: '_!=_', operator2: '_-_'}",
})
public void operatorNotLowerPrecedence(String operator1, String operator2) {
CelExpr expr =
CelExpr.newBuilder().setCall(CelCall.newBuilder().setFunction(operator2).build()).build();
assertFalse(Operator.isOperatorLowerPrecedence(operator1, expr));
}
@Test
@TestParameters({
"{operator: '_[_]'}",
"{operator: '!_'}",
"{operator: '_==_'}",
"{operator: '_?_:_'}",
"{operator: '_!=_'}",
"{operator: '_<_'}",
"{operator: '_<=_'}",
"{operator: '_>_'}",
"{operator: '_>=_'}",
"{operator: '_+_'}",
"{operator: '_-_'}",
"{operator: '_*_'}",
"{operator: '_/_'}",
"{operator: '_%_'}",
"{operator: '-_'}",
"{operator: 'has'}",
"{operator: '_[?_]'}",
"{operator: '@not_strictly_false'}",
})
public void operatorLeftRecursive(String operator) {
assertTrue(Operator.isOperatorLeftRecursive(operator));
}
@Test
@TestParameters({
"{operator: '_&&_'}",
"{operator: '_||_'}",
})
public void operatorNotLeftRecursive(String operator) {
assertFalse(Operator.isOperatorLeftRecursive(operator));
}
}