74 lines
2.8 KiB
Java
74 lines
2.8 KiB
Java
/*
|
|
* Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
*
|
|
* This code is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 only, as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This code is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
* version 2 for more details (a copy is included in the LICENSE file that
|
|
* accompanied this code).
|
|
*
|
|
* You should have received a copy of the GNU General Public License version
|
|
* 2 along with this work; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
* or visit www.oracle.com if you need additional information or have any
|
|
* questions.
|
|
*/
|
|
|
|
/*
|
|
* @test
|
|
* @summary Unit tests for String#transform(Function<String, R> f)
|
|
* @run main Transform
|
|
*/
|
|
|
|
import java.util.function.Function;
|
|
import java.util.stream.Collectors;
|
|
|
|
public class Transform {
|
|
public static void main(String[] args) {
|
|
test1();
|
|
}
|
|
|
|
/*
|
|
* Test String#transform(Function<? super String, ? extends R> f) functionality.
|
|
*/
|
|
static void test1() {
|
|
simpleTransform("toUpperCase", "abc", s -> s.toUpperCase());
|
|
simpleTransform("toLowerCase", "ABC", s -> s.toLowerCase());
|
|
simpleTransform("substring", "John Smith", s -> s.substring(0, 4));
|
|
|
|
String multiline = " This is line one\n" +
|
|
" This is line two\n" +
|
|
" This is line three\n";
|
|
String expected = "This is line one!\n" +
|
|
" This is line two!\n" +
|
|
" This is line three!\n";
|
|
check("multiline", multiline.transform(string -> {
|
|
return string.lines()
|
|
.map(s -> s.transform(t -> t.substring(4) + "!"))
|
|
.collect(Collectors.joining("\n", "", "\n"));
|
|
}), expected);
|
|
}
|
|
|
|
static void simpleTransform(String test, String s, Function<String, String> f) {
|
|
check(test, s.transform(f), f.apply(s));
|
|
}
|
|
|
|
static void check(String test, Object output, Object expected) {
|
|
if (output != expected && (output == null || !output.equals(expected))) {
|
|
System.err.println("Testing " + test + ": unexpected result");
|
|
System.err.println("Output:");
|
|
System.err.println(output);
|
|
System.err.println("Expected:");
|
|
System.err.println(expected);
|
|
throw new RuntimeException();
|
|
}
|
|
}
|
|
}
|