Add unit test for default option implementation.

diff --git a/src/test/java/net/pterodactylus/sone/core/DefaultOptionTest.java b/src/test/java/net/pterodactylus/sone/core/DefaultOptionTest.java
new file mode 100644 (file)
index 0000000..d7ca110
--- /dev/null
+++ b/src/test/java/net/pterodactylus/sone/core/DefaultOptionTest.java
@@ -0,0 +1,106 @@
+package net.pterodactylus.sone.core;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.is;
+import static org.hamcrest.Matchers.nullValue;
+
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicReference;
+
+import javax.annotation.Nullable;
+
+import net.pterodactylus.sone.core.Options.DefaultOption;
+import net.pterodactylus.sone.core.Options.Option;
+import net.pterodactylus.sone.core.Options.OptionWatcher;
+
+import com.google.common.base.Predicate;
+import org.junit.Test;
+
+/**
+ * Unit test for {@link DefaultOption}.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+public class DefaultOptionTest {
+
+       private final Object defaultValue = new Object();
+       private final Object acceptedValue = new Object();
+       private final Predicate<Object> matchesAcceptedValue = new Predicate<Object>() {
+               @Override
+               public boolean apply(@Nullable Object object) {
+                       return acceptedValue.equals(object);
+               }
+       };
+
+       @Test
+       public void defaultOptionReturnsDefaultValueWhenUnset() {
+               DefaultOption<Object> defaultOption = new DefaultOption<Object>(defaultValue);
+               assertThat(defaultOption.get(), is(defaultValue));
+       }
+
+       @Test
+       public void defaultOptionReturnsNullForRealWhenUnset() {
+               DefaultOption<Object> defaultOption = new DefaultOption<Object>(defaultValue);
+               assertThat(defaultOption.getReal(), nullValue());
+       }
+
+       @Test
+       public void defaultOptionWillReturnSetValue() {
+               DefaultOption<Object> defaultOption = new DefaultOption<Object>(defaultValue);
+               Object newValue = new Object();
+               defaultOption.set(newValue);
+               assertThat(defaultOption.get(), is(newValue));
+       }
+
+       @Test
+       public void defaultOptionWithValidatorAcceptsValidValues() {
+               DefaultOption<Object> defaultOption = new DefaultOption<Object>(defaultValue, matchesAcceptedValue);
+               defaultOption.set(acceptedValue);
+               assertThat(defaultOption.get(), is(acceptedValue));
+       }
+
+       @Test(expected = IllegalArgumentException.class)
+       public void defaultOptionWithValidatorRejectsInvalidValues() {
+               DefaultOption<Object> defaultOption = new DefaultOption<Object>(defaultValue, matchesAcceptedValue);
+               defaultOption.set(new Object());
+       }
+
+       @Test
+       public void watcherIsNotifiedOnChange() {
+               final AtomicReference<Object> changedObject = new AtomicReference<Object>();
+               Object newValue = new Object();
+               DefaultOption<Object> defaultOption = new DefaultOption<Object>(defaultValue, new OptionWatcher<Object>() {
+                       @Override
+                       public void optionChanged(Option<Object> option, Object oldValue, Object newValue) {
+                               assertThat(oldValue, nullValue());
+                               changedObject.set(newValue);
+                       }
+               });
+               defaultOption.set(newValue);
+               assertThat(defaultOption.get(), is(newValue));
+               assertThat(changedObject.get(), is(newValue));
+       }
+
+       @Test
+       public void watcherIsNotNotifiedIfValueIsSetTwice() {
+               final AtomicInteger changeCounter = new AtomicInteger();
+               Object newValue = new Object();
+               DefaultOption<Object> defaultOption = new DefaultOption<Object>(defaultValue, new OptionWatcher<Object>() {
+                       @Override
+                       public void optionChanged(Option<Object> option, Object oldValue, Object newValue) {
+                               changeCounter.incrementAndGet();
+                       }
+               });
+               defaultOption.set(newValue);
+               defaultOption.set(newValue);
+               assertThat(changeCounter.get(), is(1));
+       }
+
+       @Test
+       public void defaultOptionValidatesObjectsCorrectly() {
+               DefaultOption<Object> defaultOption = new DefaultOption<Object>(defaultValue, matchesAcceptedValue);
+               assertThat(defaultOption.validate(acceptedValue), is(true));
+               assertThat(defaultOption.validate(new Object()), is(false));
+       }
+
+}