From bcf79a01b4f5e28ff742aa842340418e8f65f3b1 Mon Sep 17 00:00:00 2001
From: Adam Kowalczyk <adamkowalczyk@gmail.com>
Date: Mon, 5 Aug 2019 15:21:18 +0100
Subject: [PATCH] Add unit tests for org.hibernate.internal.util.StringHelper

These tests were written using Diffblue Cover.
---
 .../hibernate/test/util/StringHelperTest.java | 133 ++++++++++++++++++
 1 file changed, 133 insertions(+)

diff --git a/hibernate-core/src/test/java/org/hibernate/test/util/StringHelperTest.java b/hibernate-core/src/test/java/org/hibernate/test/util/StringHelperTest.java
index 299b60bc322c..e5839966f6c1 100644
--- a/hibernate-core/src/test/java/org/hibernate/test/util/StringHelperTest.java
+++ b/hibernate-core/src/test/java/org/hibernate/test/util/StringHelperTest.java
@@ -17,12 +17,19 @@
 import org.hibernate.internal.util.StringHelper;
 import org.hibernate.testing.junit4.BaseUnitTestCase;
 
+import java.util.BitSet;
+import java.util.Iterator;
+import java.util.ArrayList;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertFalse;
 
 /**
  * @author Steve Ebersole
+ * @author Scott Buchanan
  */
 public class StringHelperTest extends BaseUnitTestCase {
 
@@ -100,4 +107,130 @@ public void testIsQuotedWithDialect() {
 		Assert.assertFalse( StringHelper.isQuoted( "a", sqlServerDialect ) );
 	}
 
+	@Test
+	public void testCountUnquotedReturnsOne() {
+		assertEquals(1, StringHelper.countUnquoted("1", '1'));
+		assertEquals(0, StringHelper.countUnquoted("1", '\u0000'));
+		assertEquals(0, StringHelper.countUnquoted("\'", '\u0000'));
+		assertEquals(0, StringHelper.countUnquoted("a\'b\'c", '\u0000'));
+	}
+
+	@Test(expected = IllegalArgumentException.class)
+	public void testCountUnquotedIllegalArgumentException() {
+		StringHelper.countUnquoted("\'", '\'');
+		// Method is not expected to return due to exception thrown
+	}
+
+	@Test
+	public void testFirstIndexOfCharReturnsNegativeOneIfNotFound() {
+		assertEquals(-1, StringHelper.firstIndexOfChar("a\'b\'c", new BitSet(), 4));
+	}
+
+	@Test
+	public void testGenerateAliasNonDigit() {
+		assertEquals(",_", StringHelper.generateAlias(","));
+		assertEquals("2x_", StringHelper.generateAlias("2"));
+		assertEquals("w_", StringHelper.generateAlias("W\u802f/"));
+	}
+
+	@Test
+	public void testGetFirstNonWhitespaceCharacter() {
+		assertEquals('\'', StringHelper.getFirstNonWhitespaceCharacter("\'"));
+	}
+
+	@Test
+	public void testGetLastNonWhitespaceCharacter() {
+		assertEquals('o', StringHelper.getLastNonWhitespaceCharacter("foo"));
+	}
+
+	@Test
+	public void testIsEmptyOrWhiteSpaceReturnsFalse() {
+		assertFalse(StringHelper.isEmptyOrWhiteSpace("BAZ"));
+	}
+
+	@Test
+	public void testIsQuotedReturnsFalse1() {
+		assertFalse(StringHelper.isQuoted("a/b/c"));
+		assertFalse(StringHelper.isQuoted("\"````"));
+		assertTrue(StringHelper.isQuoted("\"\"\"\"\""));
+	}
+
+	@Test
+	public void testLastIndexOfLetterReturnsTwo() {
+		assertEquals(2, StringHelper.lastIndexOfLetter("foo"));
+		assertEquals(0, StringHelper.lastIndexOfLetter("a\'b\'c"));
+		assertEquals(-1, StringHelper.lastIndexOfLetter("\'"));
+	}
+
+	@Test
+	public void testLocateUnquotedReturnsEmptyArray() {
+		assertArrayEquals(new int[]{}, StringHelper.locateUnquoted("\'", '%'));
+		assertArrayEquals(new int[]{0}, StringHelper.locateUnquoted(",", ','));
+		assertArrayEquals(new int[]{}, StringHelper.locateUnquoted("a\'b\'c", '\u0000'));
+	}
+
+	@Test(expected = IllegalArgumentException.class)
+	public void testLocateUnquotedThrowsIllegalArgumentException() {
+		StringHelper.locateUnquoted("a,b,c", '\'');
+		// Method is not expected to return due to exception thrown
+	}
+
+	@Test
+	public void testPartiallyUnqualifyNoBaseReturnsSameString() {
+		assertEquals("a\'b\'c", StringHelper.partiallyUnqualify("a\'b\'c", "3"));
+		assertEquals("34", StringHelper.partiallyUnqualify("1234", "1"));
+	}
+
+	@Test(expected = StringIndexOutOfBoundsException.class)
+	public void testPartiallyUnqualifyThrowsStringIndexOutOfBoundsException() {
+		StringHelper.partiallyUnqualify("a\'b\'c", "a\'b\'c");
+		// Method is not expected to return due to exception thrown
+	}
+
+	@Test
+	public void testQuote() {
+		assertEquals("`3`", StringHelper.quote("3"));
+	}
+
+	@Test
+	public void testReplaceOnce() {
+		assertEquals("a,b,c", StringHelper.replaceOnce("3", "3", "a,b,c"));
+		assertEquals("a\'b\'c", StringHelper.replaceOnce("a\'b\'c", "1234", "a,b,c"));
+	}
+
+	@Test
+	public void testJoinWithQualifiersAndSuffix() {
+		assertEquals("a.foobca.barbca.bazb", StringHelper.joinWithQualifierAndSuffix(new String[]{"foo", "bar", "baz"}, "a", "b", "c"));
+		assertEquals("", StringHelper.joinWithQualifierAndSuffix(new String[0], "foo", "bar", "BAZ"));
+	}
+
+	@Test
+	public void testJoin() {
+		Iterator<?> objects = ((ArrayList<?>) new ArrayList<String>() {
+			{
+				add("foo");
+				add("bar");
+				add("baz");
+			}
+		}).iterator();
+		assertEquals("fooabarabaz", StringHelper.join("a", objects));
+	}
+
+	@Test
+	public void testAdd() {
+		assertEquals(new String[]{"fooa", "barb", "bazc"}, StringHelper.add(new String[]{"foo", "bar", "baz"}, "", new String[]{"a", "b", "c"}));
+		assertEquals(new String[]{"fooa"}, StringHelper.add(new String[]{""}, "foo", new String[]{"a", "b", "c"}));
+	}
+
+	@Test
+	public void testRepeat() {
+		assertEquals("", StringHelper.repeat("foo", 0));
+		assertEquals("bar", StringHelper.repeat("bar", 1));
+	}
+
+	@Test
+	public void testSplitTrimmingTokens() {
+		assertEquals(new String[]{"foo", "-", "bar", "-", "baz"}, StringHelper.splitTrimmingTokens("-", "foo-bar-baz", true));
+		assertEquals(new String[]{"foo", "bar", "baz"}, StringHelper.splitTrimmingTokens("-", "foo-bar-baz", false));
+	}
 }