SimplifyTernaryTest.java

/*
 * Copyright 2024 the original author or authors.
 * <p>
 * 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
 * <p>
 * https://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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 com.yourorg;

import org.junit.jupiter.api.Test;
import org.openrewrite.DocumentExample;
import org.openrewrite.test.RecipeSpec;
import org.openrewrite.test.RewriteTest;

import static org.openrewrite.java.Assertions.java;

// This is a test for the SimplifyTernary recipe, as an example of how to write a test for a Refaster style recipe.
class SimplifyTernaryTest implements RewriteTest {

    @Override
    public void defaults(RecipeSpec spec) {
        // Note that we instantiate a generated class here, with `Recipes` appended to the Refaster class name
        spec.recipe(new SimplifyTernaryRecipes());
    }

    @Test
    @DocumentExample
    void simplified() {
        rewriteRun(
          //language=java
          java(
            """
              class Test {
                  boolean trueCondition1 = true ? true : false;
                  boolean trueCondition2 = false ? false : true;
                  boolean trueCondition3 = booleanExpression() ? true : false;
                  boolean trueCondition4 = trueCondition1 && trueCondition2 ? true : false;
                  boolean trueCondition5 = !true ? false : true;
                  boolean trueCondition6 = !false ? true : false;
              
                  boolean falseCondition1 = true ? false : true;
                  boolean falseCondition2 = !false ? false : true;
                  boolean falseCondition3 = booleanExpression() ? false : true;
                  boolean falseCondition4 = trueCondition1 && trueCondition2 ? false : true;
                  boolean falseCondition5 = !false ? false : true;
                  boolean falseCondition6 = !true ? true : false;
              
                  boolean binary1 = booleanExpression() && booleanExpression() ? true : false;
                  boolean binary2 = booleanExpression() && booleanExpression() ? false : true;
                  boolean binary3 = booleanExpression() || booleanExpression() ? true : false;
                  boolean binary4 = booleanExpression() || booleanExpression() ? false : true;
              
                  boolean booleanExpression() {
                    return true;
                  }
              }
              """,
            """
              class Test {
                  boolean trueCondition1 = true;
                  boolean trueCondition2 = true;
                  boolean trueCondition3 = booleanExpression();
                  boolean trueCondition4 = trueCondition1 && trueCondition2;
                  boolean trueCondition5 = true;
                  boolean trueCondition6 = true;
              
                  boolean falseCondition1 = false;
                  boolean falseCondition2 = false;
                  boolean falseCondition3 = !booleanExpression();
                  boolean falseCondition4 = !(trueCondition1 && trueCondition2);
                  boolean falseCondition5 = false;
                  boolean falseCondition6 = false;
              
                  boolean binary1 = booleanExpression() && booleanExpression();
                  boolean binary2 = !(booleanExpression() && booleanExpression());
                  boolean binary3 = booleanExpression() || booleanExpression();
                  boolean binary4 = !(booleanExpression() || booleanExpression());
              
                  boolean booleanExpression() {
                    return true;
                  }
              }
              """
          )
        );
    }

    // It's good practice to also include a test that verifies that the recipe doesn't change anything when it shouldn't.
    @Test
    void unchanged() {
        rewriteRun(
          //language=java
          java(
            """
              class Test {
                  boolean unchanged1 = booleanExpression() ? booleanExpression() : !booleanExpression();
                  boolean unchanged2 = booleanExpression() ? true : !booleanExpression();
                  boolean unchanged3 = booleanExpression() ? booleanExpression() : false;
              
                  boolean booleanExpression() {
                    return true;
                  }
              }
              """
          )
        );
    }
}