content: /*
   * 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
   *
   *     http://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 io.airlift.bytecode.expression;
  
  import io.airlift.bytecode.BytecodeBlock;
  import io.airlift.bytecode.BytecodeNode;
  import io.airlift.bytecode.Scope;
  import io.airlift.bytecode.Variable;
  import org.junit.jupiter.api.Test;
  
  import java.awt.Point;
  import java.lang.reflect.Field;
  import java.util.function.Function;
  
  import static io.airlift.bytecode.ParameterizedType.type;
  import static io.airlift.bytecode.expression.BytecodeExpressionAssertions.assertBytecodeExpression;
  import static io.airlift.bytecode.expression.BytecodeExpressionAssertions.assertBytecodeNode;
  import static io.airlift.bytecode.expression.BytecodeExpressions.constantInt;
  import static io.airlift.bytecode.expression.BytecodeExpressions.constantString;
  import static io.airlift.bytecode.expression.BytecodeExpressions.newInstance;
  import static io.airlift.bytecode.expression.BytecodeExpressions.setStatic;
  import static org.assertj.core.api.Assertions.assertThat;
  
  public class TestSetFieldBytecodeExpression
  {
      @SuppressWarnings({"WeakerAccess", "PublicField"})
      public static String testField;
  
      @Test
      void testSetField()
              throws Exception
      {
          assertSetPoint(point -> point.setField("x", constantInt(42)));
          assertSetPoint(point -> point.setField(field(Point.class, "x"), constantInt(42)));
      }
  
      private static void assertSetPoint(Function<BytecodeExpression, BytecodeExpression> setX)
              throws Exception
      {
          Function<Scope, BytecodeNode> nodeGenerator = scope -> {
              Variable point = scope.declareVariable(Point.class, "point");
  
              BytecodeExpression setExpression = setX.apply(point);
              assertThat(setExpression.toString()).isEqualTo("point.x = 42;");
  
              return new BytecodeBlock()
                      .append(point.set(newInstance(Point.class, constantInt(3), constantInt(7))))
                      .append(setExpression)
                      .append(point.ret());
          };
  
          assertBytecodeNode(nodeGenerator, type(Point.class), new Point(42, 7));
      }
  
      @Test
      void testSetStaticField()
              throws Exception
      {
          assertSetStaticField(setStatic(getClass(), "testField", constantString("testValue")));
          assertSetStaticField(setStatic(getClass().getField("testField"), constantString("testValue")));
          assertSetStaticField(setStatic(type(getClass()), "testField", constantString("testValue")));
      }
  
      @SuppressWarnings("AssignmentToStaticFieldFromInstanceMethod")
      private void assertSetStaticField(BytecodeExpression setStaticField)
              throws Exception
      {
          testField = "fail";
          assertBytecodeExpression(setStaticField, null, getClass().getSimpleName() + ".testField = \"testValue\";");
          assertThat(testField).isEqualTo("testValue");
      }
  
      private static Field field(Class<?> clazz, String name)
      {
          try {
              return clazz.getField(name);
          }
          catch (NoSuchFieldException e) {
              throw new RuntimeException(e);
          }
      }
  }
  