src/test/java/io/reactivex/rxjava4/internal/util/MiscUtilTest.java - 4.x - githubmirror/RxJava

src/test/java/io/reactivex/rxjava4/internal/util/MiscUtilTest.java
257 строк7 KB
David Karnok
4.x: Convert from JUnit 4 to JUnit 6 (#8202)
30 июн 2026, 12:01
30 июн 2026, 12:01531388f
/*
 * Copyright (c) 2016-present, RxJava Contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is
 * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
 * the License for the specific language governing permissions and limitations under the License.
 */

package io.reactivex.rxjava4.internal.util;

import static org.junit.jupiter.api.Assertions.*;

import java.util.*;

import org.junit.jupiter.api.Test;

import io.reactivex.rxjava4.core.*;
import io.reactivex.rxjava4.functions.BiPredicate;
import io.reactivex.rxjava4.testsupport.TestHelper;

public class MiscUtilTest extends RxJavaTest {
    @Test
    public void pow2UtilityClass() {
        TestHelper.checkUtilityClass(Pow2.class);
    }

    @Test
    public void isPowerOf2() {
        for (int i = 1; i > 0; i *= 2) {
            assertTrue(Pow2.isPowerOfTwo(i));
        }

        assertFalse(Pow2.isPowerOfTwo(3));
        assertFalse(Pow2.isPowerOfTwo(5));
        assertFalse(Pow2.isPowerOfTwo(6));
        assertFalse(Pow2.isPowerOfTwo(7));
    }

    @Test
    public void hashMapSupplier() {
        TestHelper.checkEnum(HashMapSupplier.class);
    }

    @Test
    public void arrayListSupplier() {
        TestHelper.checkEnum(ArrayListSupplier.class);
    }

    @Test
    public void errorModeEnum() {
        TestHelper.checkEnum(ErrorMode.class);
    }

    @Test
    public void linkedArrayList() {
        LinkedArrayList list = new LinkedArrayList(2);
        assertEquals(0, list.size());
        list.add(1);
        assertEquals(1, list.size());
        list.add(2);
        assertEquals(2, list.size());
        list.add(3);
        assertEquals(3, list.size());
        assertEquals("[1, 2, 3]", list.toString());
    }

    @Test
    public void appendOnlyLinkedArrayListForEachWhile() throws Exception {
        AppendOnlyLinkedArrayList<Integer> list = new AppendOnlyLinkedArrayList<>(2);

        list.add(1);
        list.add(2);
        list.add(3);

        final List<Integer> out = new ArrayList<>();

        list.forEachWhile(t2 -> {
            out.add(t2);
            return t2 == 2;
        });

        assertEquals(Arrays.asList(1, 2), out);
    }

    @Test
    public void appendOnlyLinkedArrayListForEachWhileBi() throws Throwable {
        AppendOnlyLinkedArrayList<Integer> list = new AppendOnlyLinkedArrayList<>(2);

        list.add(1);
        list.add(2);
        list.add(3);

        final List<Integer> out = new ArrayList<>();

        list.forEachWhile(2, (BiPredicate<Integer, Integer>) (t1, t2) -> {
            out.add(t2);
            return t1.equals(t2);
        });

        assertEquals(Arrays.asList(1, 2), out);
    }

    @Test
    public void appendOnlyLinkedArrayListForEachWhilePreGrow() throws Exception {
        AppendOnlyLinkedArrayList<Integer> list = new AppendOnlyLinkedArrayList<>(12);

        list.add(1);
        list.add(2);
        list.add(3);

        final List<Integer> out = new ArrayList<>();

        list.forEachWhile(t2 -> {
            out.add(t2);
            return t2 == 2;
        });

        assertEquals(Arrays.asList(1, 2), out);
    }

    @Test
    public void appendOnlyLinkedArrayListForEachWhileExact() throws Exception {
        AppendOnlyLinkedArrayList<Integer> list = new AppendOnlyLinkedArrayList<>(3);

        list.add(1);
        list.add(2);
        list.add(3);

        final List<Integer> out = new ArrayList<>();

        list.forEachWhile(t2 -> {
            out.add(t2);
            return t2 == 2;
        });

        assertEquals(Arrays.asList(1, 2), out);
    }

    @Test
    public void appendOnlyLinkedArrayListForEachWhileAll() throws Exception {
        AppendOnlyLinkedArrayList<Integer> list = new AppendOnlyLinkedArrayList<>(2);

        list.add(1);
        list.add(2);
        list.add(3);

        final List<Integer> out = new ArrayList<>();

        list.forEachWhile(t2 -> {
            out.add(t2);
            return t2 == 3;
        });

        assertEquals(Arrays.asList(1, 2, 3), out);
    }

    @Test
    public void appendOnlyLinkedArrayListForEachWhileBigger() throws Exception {
        AppendOnlyLinkedArrayList<Integer> list = new AppendOnlyLinkedArrayList<>(4);

        list.add(1);
        list.add(2);
        list.add(3);

        final List<Integer> out = new ArrayList<>();

        list.forEachWhile(t2 -> {
            out.add(t2);
            return false;
        });

        assertEquals(Arrays.asList(1, 2, 3), out);
    }

    @Test
    public void appendOnlyLinkedArrayListForEachWhileBiPreGrow() throws Throwable {
        AppendOnlyLinkedArrayList<Integer> list = new AppendOnlyLinkedArrayList<>(12);

        list.add(1);
        list.add(2);
        list.add(3);

        final List<Integer> out = new ArrayList<>();

        list.forEachWhile(2, (BiPredicate<Integer, Integer>) (t1, t2) -> {
            out.add(t2);
            return t1.equals(t2);
        });

        assertEquals(Arrays.asList(1, 2), out);
    }

    @Test
    public void appendOnlyLinkedArrayListForEachWhileBiExact() throws Throwable {
        AppendOnlyLinkedArrayList<Integer> list = new AppendOnlyLinkedArrayList<>(3);

        list.add(1);
        list.add(2);
        list.add(3);

        final List<Integer> out = new ArrayList<>();

        list.forEachWhile(2, (BiPredicate<Integer, Integer>) (t1, t2) -> {
            out.add(t2);
            return t1.equals(t2);
        });

        assertEquals(Arrays.asList(1, 2), out);
    }

    @Test
    public void appendOnlyLinkedArrayListForEachWhileBiAll() throws Throwable {
        AppendOnlyLinkedArrayList<Integer> list = new AppendOnlyLinkedArrayList<>(2);

        list.add(1);
        list.add(2);
        list.add(3);

        final List<Integer> out = new ArrayList<>();

        list.forEachWhile(3, (BiPredicate<Integer, Integer>) (_, t2) -> {
            out.add(t2);
            return false;
        });

        assertEquals(Arrays.asList(1, 2, 3), out);
    }

    @Test
    public void queueDrainHelperUtility() {
        TestHelper.checkUtilityClass(QueueDrainHelper.class);
    }

    @Test
    public void appendOnlyLinkedArrayListForEachWhileBiFullChunkNoNext() throws Throwable {
        // Fill exactly capacity elements in one chunk; no next chunk exists (a[c] == null).
        // The predicate returns false for all elements so the loop must traverse past the full chunk.
        AppendOnlyLinkedArrayList<Integer> list = new AppendOnlyLinkedArrayList<>(2);

        list.add(1);
        list.add(2);

        final List<Integer> out = new ArrayList<>();

        list.forEachWhile(null, (_, value) -> {
            out.add(value);
            return false; // never terminate early
        });

        assertEquals(Arrays.asList(1, 2), out);
    }
}