generator.server.javatool.memoizers.test.MemoizersTest.mustache Maven / Gradle / Ivy
package {{packageName}}.shared.memoizer.domain;
import static org.assertj.core.api.Assertions.*;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.function.Function;
import java.util.function.Supplier;
import org.junit.jupiter.api.Test;
import {{packageName}}.UnitTest;
@UnitTest
class MemoizersTest {
@Test
void shouldGetFunctionResult() {
Function memoizer = Memoizers.of(d -> d * d);
assertThat(memoizer.apply(2D)).isEqualTo(4D);
}
@Test
void shouldMemoizeFunctionResult() {
AtomicInteger result = new AtomicInteger();
Function memoizer = Memoizers.of(d -> result.incrementAndGet());
assertThat(memoizer.apply(1)).isEqualTo(memoizer.apply(1));
assertThat(memoizer.apply(1)).isNotEqualTo(memoizer.apply(2));
}
@Test
void shouldMemoizeNullResult() {
NullFactory factory = new NullFactory();
Function memoizer = Memoizers.of(factory);
memoizer.apply(1);
memoizer.apply(1);
assertThat(factory.callsCount()).isEqualTo(1);
assertThat(memoizer.apply(1)).isNull();
}
@Test
void shouldMemoizeSupplier() {
Supplier supplier = Memoizers.of(() -> "Pouet");
assertThat(supplier.get()).isEqualTo("Pouet");
}
private static final class NullFactory implements Function {
private final AtomicInteger callsCount = new AtomicInteger();
public int callsCount() {
return callsCount.get();
}
@Override
public String apply(Object input) {
callsCount.incrementAndGet();
return null;
}
}
}