BAEL-1171 java.lang.String API (#2732)
* Evaluation article: Different Types of Bean Injection in Spring * added tests & changed configuration to Java-based config * removed xml config files * rename unit tests * BAEL-972 - Apache Commons Text * remove code from evaluation article * remove code from evaluation article * BAEL-972 - Apache Commons Text - added another example * BAEL-972 - Apache Commons Text - just indentation * BAEL-994 - TemporalAdjuster in Java * BAEL-994 - TemporalAdjuster in Java * BAEL-994 - TemporalAdjuster in Java * BAEL-994 - TemporalAdjuster in Java * BAEL-994 - TemporalAdjuster in Java - fix problems * BAEL-1033 Introduction to StreamUtils * BAEL-1033 Introduction to StreamUtils * BAEL-1033 Introduction to StreamUtils * fix formatting * BAEL-1033 minor refactor * BAEL-1035 Introduction to Eclipse Collections * format * BAEL-1035 Introduction to Eclipse Collections * BAEL-1035 Introduction to Eclipse Collections * BAEL-1035 Introduction to Eclipse Collections * cleanup * cleanup * BAEL-1109 Introduction to JCache * BAEL-1109 Introduction to JCache * remove unneeded property in pom.xml * fix formatting * close cache instances properly * remove latest commit * BAEL-1057 Introduction to rxjava-jdbc * refactor rxjava-jdbc * Refactor rxjava-jdbc * Refactoring rxjava-jdbc * BAEL-1171 java.lang.String API * refactor rxjava-jdbc * refactor String * String API - move multiple classes into a single class * move class into test package * BAEL-1171 String.lang.String API
This commit is contained in:
Ahmed Tawila
Grzegorz Piwowarek
parent
cccd72d451
commit
b85bb1ae1e
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@ -2,6 +2,13 @@ package com.baeldung.string;
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import static org.junit.Assert.assertArrayEquals;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertTrue;
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import static org.junit.Assert.assertFalse;
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import java.nio.charset.Charset;
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import java.nio.charset.StandardCharsets;
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import java.util.IllegalFormatException;
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import java.util.regex.PatternSyntaxException;
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import org.junit.Test;
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@ -12,6 +19,11 @@ public class StringTest {
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assertEquals(97, "abcd".codePointAt(0));
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}
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@Test(expected = StringIndexOutOfBoundsException.class)
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public void whenPassNonExistingIndex_thenExceptionThrown() {
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int a = "abcd".codePointAt(4);
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}
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@Test
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public void whenCallConcat_thenCorrect() {
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assertEquals("elephant", "elep".concat("hant"));
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@ -21,6 +33,180 @@ public class StringTest {
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public void whenGetBytes_thenCorrect() {
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byte[] byteArray = "abcd".getBytes();
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byte[] expected = new byte[] { 97, 98, 99, 100 };
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assertArrayEquals(expected, byteArray);
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}
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@Test
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public void whenGetBytesUsingUTF16_thenCorrect() {
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byte[] byteArray = "efgh".getBytes(StandardCharsets.US_ASCII);
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byte[] expected = new byte[] { 101, 102, 103, 104 };
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assertArrayEquals(expected, byteArray);
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}
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@Test
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public void whenCreateStringUsingByteArray_thenCorrect() {
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byte[] array = new byte[] { 97, 98, 99, 100 };
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String s = new String(array);
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assertEquals("abcd", s);
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}
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@Test
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public void whenCallCharAt_thenCorrect() {
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assertEquals('P', "Paul".charAt(0));
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}
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@Test(expected = IndexOutOfBoundsException.class)
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public void whenCharAtOnNonExistingIndex_thenIndexOutOfBoundsExceptionThrown() {
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char character = "Paul".charAt(4);
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}
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@Test
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public void whenCallCodePointCount_thenCorrect() {
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assertEquals(2, "abcd".codePointCount(0, 2));
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}
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@Test(expected = IndexOutOfBoundsException.class)
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public void whenSecondIndexEqualToLengthOfString_thenIndexOutOfBoundsExceptionThrown() {
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char character = "Paul".charAt(4);
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}
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@Test
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public void whenCallContains_thenCorrect() {
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String s = "abcd";
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assertTrue(s.contains("abc"));
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assertFalse(s.contains("cde"));
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}
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@Test
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public void whenCallCopyValueOf_thenStringConstructed() {
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char[] array = new char[] { 'a', 'b', 'c', 'd' };
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assertEquals("abcd", String.copyValueOf(array));
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}
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@Test
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public void whenCallEndsWith_thenCorrect() {
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String s1 = "test";
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assertTrue(s1.endsWith("t"));
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}
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@Test
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public void whenFormat_thenCorrect() {
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String value = "Baeldung";
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String formatted = String.format("Welcome to %s!", value);
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assertEquals("Welcome to Baeldung!", formatted);
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}
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@Test(expected = IllegalFormatException.class)
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public void whenInvalidFormatSyntax_thenIllegalFormatExceptionThrown() {
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String value = "Baeldung";
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String formatted = String.format("Welcome to %x!", value);
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}
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@Test
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public void whenCallIndexOf_thenCorrect() {
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assertEquals(1, "foo".indexOf("o"));
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}
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@Test
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public void whenCallIsEmpty_thenCorrect() {
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String s1 = "";
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assertTrue(s1.isEmpty());
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}
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@Test
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public void whenCallLastIndexOf_thenCorrect() {
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assertEquals(2, "foo".lastIndexOf("o"));
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}
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@Test
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public void whenCallRegionMatches_thenCorrect() {
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assertTrue("welcome to baeldung".regionMatches(false, 11, "baeldung", 0, 8));
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}
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@Test
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public void whenCallStartsWith_thenCorrect() {
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assertTrue("foo".startsWith("f"));
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}
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@Test
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public void whenTrim_thenCorrect() {
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assertEquals("foo", " foo ".trim());
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}
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@Test
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public void whenSplit_thenCorrect() {
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String s = "Welcome to Baeldung";
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String[] array = new String[] { "Welcome", "to", "Baeldung" };
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assertArrayEquals(array, s.split(" "));
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}
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@Test(expected = PatternSyntaxException.class)
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public void whenPassInvalidParameterToSplit_thenPatternSyntaxExceptionThrown() {
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String s = "Welcome*to Baeldung";
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String[] result = s.split("*");
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}
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@Test
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public void whenCallSubstring_thenCorrect() {
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String s = "Welcome to Baeldung";
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assertEquals("Welcome", s.substring(0, 7));
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}
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@Test(expected = IndexOutOfBoundsException.class)
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public void whenSecondIndexEqualToLengthOfString_thenCorrect() {
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String s = "Welcome to Baeldung";
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String sub = s.substring(0, 20);
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}
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@Test
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public void whenConvertToUpperCase_thenCorrect() {
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String s = "Welcome to Baeldung!";
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assertEquals("WELCOME TO BAELDUNG!", s.toUpperCase());
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}
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@Test
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public void whenConvertToLowerCase_thenCorrect() {
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String s = "WELCOME to BAELDUNG!";
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assertEquals("welcome to baeldung!", s.toLowerCase());
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}
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@Test
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public void whenCallReplace_thenCorrect() {
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String s = "I learn Spanish";
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assertEquals("I learn French", s.replaceAll("Spanish", "French"));
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}
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@Test
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public void whenIntern_thenCorrect() {
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String s1 = "abc";
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String s2 = new String("abc");
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String s3 = new String("foo");
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String s4 = s1.intern();
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String s5 = s2.intern();
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assertFalse(s3 == s4);
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assertTrue(s1 == s5);
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}
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@Test
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public void whenCallValueOf_thenCorrect() {
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long l = 200L;
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assertEquals("200", String.valueOf(l));
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}
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}
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