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Lambdas01Exercise DONE #2

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6f7f885
Lambdas01Exercise DONE
mmgeorg Mar 31, 2017
7bd86b0
Lambdas02Exercise done
mmgeorg Apr 3, 2017
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23 changes: 20 additions & 3 deletions src/test/java/lambda/part1/exercise/Lambdas01Exercise.java
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Original file line number Diff line number Diff line change
@@ -1,9 +1,14 @@
package lambda.part1.exercise;

import com.google.common.base.Optional;
import com.google.common.base.Predicate;
import com.google.common.collect.FluentIterable;
import com.google.common.collect.ImmutableList;
import data.Person;
import org.junit.jupiter.api.Test;

import java.util.Arrays;
import java.util.Comparator;
import java.util.List;

import static org.junit.jupiter.api.Assertions.assertArrayEquals;
Expand All @@ -19,7 +24,12 @@ void sortPersonsByAge() {
new Person("name 2", "lastName 1", 30)
};

// TODO use Arrays.sort
Arrays.sort(persons, new Comparator<Person>() {
@Override
public int compare(Person o1, Person o2) {
return Integer.compare(o1.getAge(),o2.getAge());
}
});

assertArrayEquals(persons, new Person[]{
new Person("name 3", "lastName 3", 20),
Expand All @@ -36,10 +46,17 @@ void findFirstWithAge30() {
new Person("name 2", "lastName 1", 30)
);

Person person = null;

// TODO use FluentIterable

Optional<Person> personOptional =FluentIterable.from(persons)
.firstMatch(new Predicate<Person>() {
@Override
public boolean apply(Person input) {
return input.getAge() == 30;
}
});

Person person = personOptional.isPresent() ? personOptional.get() : null;
assertEquals(person, new Person("name 1", "lastName 2", 30));
}
}
7 changes: 6 additions & 1 deletion src/test/java/lambda/part1/exercise/Lambdas02Exercise.java
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Original file line number Diff line number Diff line change
@@ -1,9 +1,12 @@
package lambda.part1.exercise;

import com.google.common.collect.FluentIterable;
import com.google.common.collect.ImmutableList;
import data.Person;
import org.junit.jupiter.api.Test;

import java.util.Arrays;
import java.util.Comparator;
import java.util.List;

import static org.junit.jupiter.api.Assertions.assertArrayEquals;
Expand All @@ -19,6 +22,7 @@ void sortPersonsByAge() {
};

// TODO use Arrays.sort
Arrays.sort(persons, Comparator.comparingInt(Person::getAge));

assertArrayEquals(persons, new Person[]{
new Person("name 3", "lastName 3", 20),
Expand All @@ -35,9 +39,10 @@ void findFirstWithAge30() {
new Person("name 2", "lastName 1", 30)
);

Person person = null;

// TODO use FluentIterable
Person person = FluentIterable.from(persons)
.firstMatch(input->input.getAge() == 30).orNull();

assertEquals(person, new Person("name 1", "lastName 2", 30));
}
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