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BAEL-5981 - String Interpolation in Java (#13092)

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alemoles 2022-11-27 19:28:44 -03:00 committed by GitHub
parent 53dbea8d56
commit 965cf501f5
2 changed files with 90 additions and 0 deletions
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6
core-java-modules/core-java-string-operations-5/pom.xml
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@ -20,6 +20,11 @@
<artifactId>commons-lang3</artifactId>
<version>${apache.commons.lang3.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-text</artifactId>
<version>${commons-text.version}</version>
</dependency>
</dependencies>
<build>
@ -39,6 +44,7 @@
<maven.compiler.source>11</maven.compiler.source>
<maven.compiler.target>11</maven.compiler.target>
<apache.commons.lang3.version>3.12.0</apache.commons.lang3.version>
<commons-text.version>1.10.0</commons-text.version>
</properties>
</project>

84
core-java-modules/core-java-string-operations-5/src/test/java/com/baeldung/string_interpolation/StringInterpolationUnitTest.java Normal file
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@ -0,0 +1,84 @@
package com.baeldung.string_interpolation;
import static org.junit.jupiter.api.Assertions.assertEquals;
import java.text.MessageFormat;
import java.util.HashMap;
import java.util.Map;
import org.apache.commons.text.StringSubstitutor;
import org.junit.jupiter.api.Test;
public class StringInterpolationUnitTest {
private final String EXPECTED_STRING = "String Interpolation in Java with some Java examples.";
@Test
public void givenTwoString_thenInterpolateWithPlusSign() {
String EXPECTED_STRING = "String Interpolation in Java with some Java examples.";
String first = "Interpolation";
String second = "Java";
String result = "String " + first + " in " + second + " with some " + second + " examples.";
assertEquals(EXPECTED_STRING, result);
}
@Test
public void givenTwoString_thenInterpolateWithFormat() {
String first = "Interpolation";
String second = "Java";
String result = String.format("String %s in %s with some %s examples.", first, second, second);
assertEquals(EXPECTED_STRING, result);
}
@Test
public void givenTwoString_thenInterpolateWithFormatted() {
String first = "Interpolation";
String second = "Java";
String result = String.format("String %s in %s with some %s examples.", first, second, second);
assertEquals(EXPECTED_STRING, result);
}
@Test
public void givenTwoString_thenInterpolateWithFormatStringReference() {
String first = "Interpolation";
String second = "Java";
String result = String.format("String %1$s in %2$s with some %2$s examples.", first, second);
assertEquals(EXPECTED_STRING, result);
}
@Test
public void givenTwoString_thenInterpolateWithStringBuilder() {
String first = "Interpolation";
String second = "Java";
StringBuilder builder = new StringBuilder();
builder.append("String ")
.append(first)
.append(" in ")
.append(second)
.append(" with some ")
.append(second)
.append(" examples.");
String result = builder.toString();
assertEquals(EXPECTED_STRING, result);
}
@Test
public void givenTwoString_thenInterpolateWithMessageFormat() {
String first = "Interpolation";
String second = "Java";
String result = MessageFormat.format("String {0} in {1} with some {1} examples.", first, second);
assertEquals(EXPECTED_STRING, result);
}
@Test
public void givenTwoString_thenInterpolateWithStringSubstitutor() {
String baseString = "String ${first} in ${second} with some ${second} examples.";
String first = "Interpolation";
String second = "Java";
Map<String, String> parameters = new HashMap<>();
parameters.put("first", first);
parameters.put("second", second);
StringSubstitutor substitutor = new StringSubstitutor(parameters);
String result = substitutor.replace(baseString);
assertEquals(EXPECTED_STRING, result);
}
}