src/test/java/com/android/tools/r8/ir/optimize/membervaluepropagation/StaticFieldAssignedOnlyInInstanceConstructorTest.java

// Copyright (c) 2020, the R8 project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

package com.android.tools.r8.ir.optimize.membervaluepropagation;

import com.android.tools.r8.TestBase;
import com.android.tools.r8.TestParameters;
import com.android.tools.r8.TestParametersCollection;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;

@RunWith(Parameterized.class)
public class StaticFieldAssignedOnlyInInstanceConstructorTest extends TestBase {

  private final TestParameters parameters;

  @Parameters(name = "{0}")
  public static TestParametersCollection params() {
    return getTestParameters().withAllRuntimesAndApiLevels().build();
  }

  public StaticFieldAssignedOnlyInInstanceConstructorTest(TestParameters parameters) {
    this.parameters = parameters;
  }

  @Test
  public void test() throws Exception {
    testForR8(parameters.getBackend())
        .addInnerClasses(StaticFieldAssignedOnlyInInstanceConstructorTest.class)
        .addKeepMainRule(TestClass.class)
        .setMinApi(parameters)
        .compile()
        .run(parameters.getRuntime(), TestClass.class)
        .assertSuccessWithOutputLines("0");
  }

  static class TestClass {

    static int FIELD;

    public static void main(String[] args) {
      System.out.println(FIELD); // Should print 0.
      new TestClass();
    }

    public TestClass() {
      FIELD = 42;
    }
  }
}