Java 12 String API Test

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Ganesh Pagade 2019-05-07 10:58:11 +05:30
parent e4abb5af73
commit fc227bc128
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package com.baeldung;
import static org.hamcrest.CoreMatchers.equalTo;
import static org.hamcrest.MatcherAssert.assertThat;
import org.junit.Test;
public class StringAPITest {
@Test
public void whenPositiveArgument_thenReturnIndentedString() {
String multilineStr = "This is\na multiline\nstring.";
String outputStr = " This is\n a multiline\n string.\n";
String postIndent = multilineStr.indent(3);
assertThat(outputStr, equalTo(postIndent));
}
@Test
public void whenNegativeArgument_thenReturnReducedIndentedString() {
String multilineStr = " This is\n a multiline\n string.";
String outputStr = " This is\n a multiline\n string.\n";
String postIndent = multilineStr.indent(-2);
assertThat(outputStr, equalTo(postIndent));
}
@Test
public void whenTransformUsingLamda_thenReturnTransformedString() {
String result = "hello".transform(input -> input + " world!");
assertThat("hello world!", equalTo(result));
}
@Test
public void whenTransformUsingParseInt_thenReturnInt() {
int result = "42".transform(Integer::parseInt);
assertThat(42, equalTo(result));
}
}