fix code

hutool-core/src/test/java/cn/hutool/core/collection/iter/IterChainTest.java

@@ -14,8 +14,8 @@ public class IterChainTest {
 
 	@Test
 	public void testAddChain() {
-		Iterator<Integer> iter1 = Arrays.asList(1, 2).iterator();
-		Iterator<Integer> iter2 = Arrays.asList(3, 4).iterator();
+		final Iterator<Integer> iter1 = Arrays.asList(1, 2).iterator();
+		final Iterator<Integer> iter2 = Arrays.asList(3, 4).iterator();
 		IterChain<Integer> iterChain = new IterChain<>();
 		Assert.assertSame(iterChain, iterChain.addChain(iter1));
 		Assert.assertSame(iterChain, iterChain.addChain(iter2));
@@ -27,7 +27,7 @@ public class IterChainTest {
 
 	@Test
 	public void testHasNext() {
-		IterChain<Integer> iterChain = new IterChain<>();
+		final IterChain<Integer> iterChain = new IterChain<>();
 		Assert.assertFalse(iterChain.hasNext());
 		Assert.assertFalse(iterChain.addChain(Collections.emptyIterator()).hasNext());
 		Assert.assertTrue(iterChain.addChain(Arrays.asList(3, 4).iterator()).hasNext());
@@ -35,9 +35,9 @@ public class IterChainTest {
 
 	@Test
 	public void testNext() {
-		Iterator<Integer> iter1 = Arrays.asList(1, 2).iterator();
-		Iterator<Integer> iter2 = Arrays.asList(3, 4).iterator();
-		IterChain<Integer> iterChain = new IterChain<>();
+		final Iterator<Integer> iter1 = Arrays.asList(1, 2).iterator();
+		final Iterator<Integer> iter2 = Arrays.asList(3, 4).iterator();
+		final IterChain<Integer> iterChain = new IterChain<>();
 		Assert.assertSame(iterChain, iterChain.addChain(iter1));
 		Assert.assertSame(iterChain, iterChain.addChain(iter2));
 		Assert.assertEquals((Integer)1, iterChain.next());
@@ -48,20 +48,20 @@ public class IterChainTest {
 
 	@Test
 	public void testRemove() {
-		IterChain<Integer> iterChain = new IterChain<>();
+		final IterChain<Integer> iterChain = new IterChain<>();
 		iterChain.addChain(Arrays.asList(1, 2).iterator());
 		Assert.assertThrows(IllegalStateException.class, iterChain::remove);
 	}
 
 	@Test
 	public void testIterator() {
-		Iterator<Integer> iter1 = Arrays.asList(1, 2).iterator();
-		Iterator<Integer> iter2 = Arrays.asList(3, 4).iterator();
-		IterChain<Integer> iterChain = new IterChain<>();
+		final Iterator<Integer> iter1 = Arrays.asList(1, 2).iterator();
+		final Iterator<Integer> iter2 = Arrays.asList(3, 4).iterator();
+		final IterChain<Integer> iterChain = new IterChain<>();
 		Assert.assertSame(iterChain, iterChain.addChain(iter1));
 		Assert.assertSame(iterChain, iterChain.addChain(iter2));
 
-		Iterator<Iterator<Integer>> iterators = iterChain.iterator();
+		final Iterator<Iterator<Integer>> iterators = iterChain.iterator();
 		Assert.assertSame(iter1, iterators.next());
 		Assert.assertSame(iter2, iterators.next());
 	}

hutool-core/src/test/java/cn/hutool/core/io/FileUtilTest.java

@@ -446,6 +446,10 @@ public class FileUtilTest {
 		Assert.assertEquals("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", mimeType);
 		mimeType = FileUtil.getMimeType("test.pptx");
 		Assert.assertEquals("application/vnd.openxmlformats-officedocument.presentationml.presentation", mimeType);
+
+		// pr#2617@Github
+		mimeType = FileUtil.getMimeType("test.wgt");
+		Assert.assertEquals("application/widget", mimeType);
 	}
 
 	@Test

hutool-core/src/test/java/cn/hutool/core/lang/hash/MurmurHashTest.java

@@ -4,20 +4,20 @@ import cn.hutool.core.text.StrUtil;
 import org.junit.Assert;
 import org.junit.Test;
 
-public class MurMurHashTest {
+public class MurmurHashTest {
 
 	@Test
 	public void hash32Test() {
 		int hv = MurmurHash.hash32(StrUtil.utf8Bytes("你"));
-		Assert.assertEquals(222142701, hv);
+		Assert.assertEquals(-1898877446, hv);
 
 		hv = MurmurHash.hash32(StrUtil.utf8Bytes("你好"));
-		Assert.assertEquals(1188098267, hv);
+		Assert.assertEquals(337357348, hv);
 
 		hv = MurmurHash.hash32(StrUtil.utf8Bytes("见到你很高兴"));
-		Assert.assertEquals(-1898490321, hv);
+		Assert.assertEquals(1101306141, hv);
 		hv = MurmurHash.hash32(StrUtil.utf8Bytes("我们将通过生成一个大的文件的方式来检验各种方法的执行效率因为这种方式在结束的时候需要执行文件"));
-		Assert.assertEquals(-1713131054, hv);
+		Assert.assertEquals(-785444229, hv);
 	}
 
 	@Test

hutool-core/src/test/java/cn/hutool/core/stream/StreamUtilTest.java

@@ -1,8 +1,15 @@
 package cn.hutool.core.stream;
 
+import cn.hutool.core.collection.ListUtil;
+import cn.hutool.core.collection.SetUtil;
 import org.junit.Assert;
 import org.junit.Test;
 
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
 public class StreamUtilTest {
@@ -13,4 +20,36 @@ public class StreamUtilTest {
 		final String result = stream.collect(CollectorUtil.joining(","));
 		Assert.assertEquals("2,4,8,16", result);
 	}
+
+	// === iterator ===
+	@Test
+	public void streamTestNullIterator() {
+		Assert.assertThrows(IllegalArgumentException.class, () -> StreamUtil.ofIter((Iterator<Object>) null));
+	}
+
+	@SuppressWarnings({"RedundantOperationOnEmptyContainer", "RedundantCollectionOperation"})
+	@Test
+	public void streamTestEmptyListToIterator() {
+		assertStreamIsEmpty(StreamUtil.ofIter(new ArrayList<>().iterator()));
+	}
+
+	@Test
+	public void streamTestEmptyIterator() {
+		assertStreamIsEmpty(StreamUtil.ofIter(Collections.emptyIterator()));
+	}
+
+	@Test
+	public void streamTestOrdinaryIterator() {
+		final ArrayList<Integer> arrayList = ListUtil.of(1, 2, 3);
+		Assert.assertArrayEquals(new Integer[]{1, 2, 3}, StreamUtil.ofIter(arrayList.iterator()).toArray());
+
+		final HashSet<Integer> hashSet = SetUtil.of(1, 2, 3);
+		Assert.assertEquals(hashSet, StreamUtil.ofIter(hashSet.iterator()).collect(Collectors.toSet()));
+	}
+
+	void assertStreamIsEmpty(final Stream<?> stream) {
+		Assert.assertNotNull(stream);
+		Assert.assertEquals(0, stream.toArray().length);
+	}
+	// ================ stream test end ================
 }