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//

// 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 codelab;

import static com.google.common.truth.Truth.assertThat;

import static org.junit.Assert.assertThrows;

import com.google.testing.junit.testparameterinjector.TestParameterInjector;

import com.google.testing.junit.testparameterinjector.TestParameters;

import dev.cel.runtime.CelEvaluationException;

import org.junit.Test;

import org.junit.runner.RunWith;

@RunWith(TestParameterInjector.class)

public final class Exercise3Test {

private final Exercise3 exercise3 = new Exercise3();

/**

* Demonstrates CEL's unique feature of commutative logical operators.

*

* <p>If a logical operation can short-circuit a branch that results in an error, CEL evaluation

* will return the logical result instead of propagating the error.

*/

@Test

@TestParameters("{expression: 'true || true', expectedResult: true}")

@TestParameters("{expression: 'true || false', expectedResult: true}")

@TestParameters("{expression: 'false || true', expectedResult: true}")

@TestParameters("{expression: 'false || false', expectedResult: false}")

@TestParameters("{expression: 'true || (1 / 0 > 2)', expectedResult: true}")

@TestParameters("{expression: '(1 / 0 > 2) || true', expectedResult: true}")

public void evaluate_logicalOrShortCircuits_success(String expression, boolean expectedResult) {

Object evaluatedResult = exercise3.compileAndEvaluate(expression);

assertThat(evaluatedResult).isEqualTo(expectedResult);

}

/** Demonstrates a case where an error is surfaced to the user. */

@Test

@TestParameters("{expression: 'false || (1 / 0 > 2)'}")

@TestParameters("{expression: '(1 / 0 > 2) || false'}")

public void evaluate_logicalOrFailure_throwsException(String expression) {

IllegalArgumentException exception =

assertThrows(

IllegalArgumentException.class, () -> exercise3.compileAndEvaluate(expression));

assertThat(exception).hasMessageThat().contains("Evaluation error has occurred.");

assertThat(exception).hasCauseThat().isInstanceOf(CelEvaluationException.class);

assertThat(exception).hasCauseThat().hasMessageThat().contains("evaluation error");

assertThat(exception).hasCauseThat().hasMessageThat().contains("/ by zero");

}

@Test

@TestParameters("{expression: 'todo: Fill me in using logical AND! (&&)', expectedResult: true}")

public void evaluate_logicalAndShortCircuits_success(String expression, boolean expectedResult) {

Object evaluatedResult = exercise3.compileAndEvaluate(expression);

assertThat(evaluatedResult).isEqualTo(expectedResult);

}

@Test

@TestParameters("{expression: 'todo: Fill me in using logical AND! (&&)'}")

public void evaluate_logicalAndFailure_throwsException(String expression) {

IllegalArgumentException exception =

assertThrows(

IllegalArgumentException.class, () -> exercise3.compileAndEvaluate(expression));

assertThat(exception).hasMessageThat().contains("Evaluation error has occurred.");

assertThat(exception).hasCauseThat().isInstanceOf(CelEvaluationException.class);

assertThat(exception).hasCauseThat().hasMessageThat().contains("evaluation error");

assertThat(exception).hasCauseThat().hasMessageThat().contains("/ by zero");

}

@Test

@TestParameters("{expression: 'false ? (1 / 0) > 2 : false', expectedResult: false}")

@TestParameters("{expression: 'todo: Fill me in using ternary! A ? B : C', expectedResult: true}")

public void evaluate_ternaryShortCircuits_success(String expression, boolean expectedResult) {

Object evaluatedResult = exercise3.compileAndEvaluate(expression);

assertThat(evaluatedResult).isEqualTo(expectedResult);

}

@Test

@TestParameters("{expression: 'todo: Fill me in using ternary! A ? B : C'}")

public void evaluate_ternaryFailure_throwsException(String expression) {

IllegalArgumentException exception =

assertThrows(

IllegalArgumentException.class, () -> exercise3.compileAndEvaluate(expression));

assertThat(exception).hasMessageThat().contains("Evaluation error has occurred.");

assertThat(exception).hasCauseThat().isInstanceOf(CelEvaluationException.class);

assertThat(exception).hasCauseThat().hasMessageThat().contains("evaluation error");

assertThat(exception).hasCauseThat().hasMessageThat().contains("/ by zero");

}

}