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Merged
jbgi merged 1 commit into from
Aug 18, 2018
Merged

Add FingerTree tests #351

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1 change: 0 additions & 1 deletion core/src/test/java/fj/FWFunctionsTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,6 @@

import org.junit.Test;

import fj.F1W;
import static org.hamcrest.core.Is.is;
import static org.junit.Assert.assertThat;

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37 changes: 27 additions & 10 deletions props-core/src/test/java/fj/data/fingertrees/FingerTreeTest.java
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Original file line number Diff line number Diff line change
@@ -1,19 +1,19 @@
package fj.data.fingertrees;

import fj.Function;
import fj.P;
import fj.P2;
import fj.Show;
import fj.data.List;
import fj.data.Stream;
import fj.data.Option;
import org.junit.Test;

import static fj.P.p;
import static fj.Show.intShow;
import static fj.test.Property.prop;
import static fj.test.Property.property;
import static java.lang.System.out;
import static fj.Monoid.intAdditionMonoid;
import static fj.Monoid.intMinMonoid;
import static fj.data.fingertrees.FingerTree.measured;
import static org.hamcrest.CoreMatchers.equalTo;
import static org.junit.Assert.assertThat;
import static org.hamcrest.core.Is.is;


/**
* Created by MarkPerry on 10/10/2015.
Expand All @@ -24,18 +24,35 @@ public class FingerTreeTest {

@Test
public void size() {
validateSize(List.list(-92, 68, 54, -77, -18, 67));
validateSize(List.list(-92, 68, 54, -77, -18, 67, -60, 23, -70, 99, 66, -79, -5));
validateOperations(List.list(-92, 68, 54, -77, -18, 67));
validateOperations(List.list(-92, 68, 54, -77, -18, 67, -60, 23, -70, 99, 66, -79, -5));
}

void validateSize(List<Integer> list) {
void validateOperations(List<Integer> list) {
FingerTree<Integer, Integer> ft = list.foldLeft(
(acc, i) -> acc.snoc(i), FingerTree.<Integer>emptyIntAddition()
);
assertThat(ft.measure(), equalTo(list.length()));
assertThat(ft.foldLeft((s, i) -> s + 1, 0), equalTo(list.length()));
assertThat(ft.foldRight((i, s) -> 1 + s, 0), equalTo(list.length()));
assertThat(ft.filter(e -> e.equals(-77)).head(), equalTo(-77));
assertThat(ft.length(), equalTo(list.length()));
}

@Test
public void testHeadOption() {
assertThat(Empty.emptyIntAddition().headOption(), is(Option.none()));
FingerTree<Integer, Integer> ft = new MakeTree(measured(intAdditionMonoid, Function.constant(1))).single(1);
assertThat(ft.headOption(), is(Option.some(1)));
}

@Test
public void testUncons() {
assertThat(Empty.emptyIntAddition().uncons(0, (h, t) -> h), is(0));
FingerTree<Integer, Integer> ft = new MakeTree(measured(intAdditionMonoid, Function.constant(1))).single(1);
assertThat(ft.uncons(0, (h, t) -> h), is(1));
}

public FingerTree<Integer, Integer> midSeq() {
FingerTree<Integer, Integer> ft = FingerTree.emptyIntAddition();
return List.range(1, SIZE).foldLeft(ft2 -> i -> ft2.snoc(i), ft);
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