StaticInitializerTest.java

package org.robolectric;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.robolectric.annotation.Implements;
import org.robolectric.annotation.internal.Instrument;
import org.robolectric.internal.SandboxTestRunner;
import org.robolectric.internal.bytecode.SandboxConfig;
import org.robolectric.internal.bytecode.RobolectricInternals;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

@RunWith(SandboxTestRunner.class)
public class StaticInitializerTest {
  @Test
  public void whenClassIsUnshadowed_shouldPerformStaticInitialization() throws Exception {
    assertEquals("Floyd", ClassWithStaticInitializerA.name);
  }

  @Instrument
  public static class ClassWithStaticInitializerA {
    static String name = "Floyd";
  }


  @Test
  @SandboxConfig(shadows = {ShadowClassWithoutStaticInitializerOverride.class})
  public void whenClassHasShadowWithoutOverrideMethod_shouldPerformStaticInitialization() throws Exception {
    assertEquals("Floyd", ClassWithStaticInitializerB.name);

    RobolectricInternals.performStaticInitialization(ClassWithStaticInitializerB.class);
    assertEquals("Floyd", ClassWithStaticInitializerB.name);
  }

  @Instrument public static class ClassWithStaticInitializerB {
    public static String name = "Floyd";
  }

  @Implements(ClassWithStaticInitializerB.class) public static class ShadowClassWithoutStaticInitializerOverride {
  }

  @Test
  @SandboxConfig(shadows = {ShadowClassWithStaticInitializerOverride.class})
  public void whenClassHasShadowWithOverrideMethod_shouldDeferStaticInitialization() throws Exception {
    assertFalse(ShadowClassWithStaticInitializerOverride.initialized);
    assertEquals(null, ClassWithStaticInitializerC.name);
    assertTrue(ShadowClassWithStaticInitializerOverride.initialized);

    RobolectricInternals.performStaticInitialization(ClassWithStaticInitializerC.class);
    assertEquals("Floyd", ClassWithStaticInitializerC.name);
  }

  @Instrument public static class ClassWithStaticInitializerC {
    public static String name = "Floyd";
  }

  @Implements(ClassWithStaticInitializerC.class)
  public static class ShadowClassWithStaticInitializerOverride {
    public static boolean initialized = false;

    @SuppressWarnings("UnusedDeclaration")
    public static void __staticInitializer__() {
      initialized = true;
    }
  }
}