From c6e380d798ed362a754754a73f82a7553f66dd0d Mon Sep 17 00:00:00 2001 From: krzysztof Date: Wed, 23 Dec 2020 12:46:18 +0100 Subject: [PATCH 1/2] BAEL-4750 Java 12 New Features --- .../newfeatures/CompactNumbersUnitTest.java | 21 ++++++++++++ .../newfeatures/FileMismatchUnitTest.java | 32 +++++++++++++++++++ .../baeldung/newfeatures/StringUnitTest.java | 15 +++++++++ .../newfeatures/TeeingCollectorUnitTest.java | 18 +++++++++++ 4 files changed, 86 insertions(+) create mode 100644 core-java-modules/core-java-12/src/test/java/com/baeldung/newfeatures/CompactNumbersUnitTest.java create mode 100644 core-java-modules/core-java-12/src/test/java/com/baeldung/newfeatures/FileMismatchUnitTest.java create mode 100644 core-java-modules/core-java-12/src/test/java/com/baeldung/newfeatures/StringUnitTest.java create mode 100644 core-java-modules/core-java-12/src/test/java/com/baeldung/newfeatures/TeeingCollectorUnitTest.java diff --git a/core-java-modules/core-java-12/src/test/java/com/baeldung/newfeatures/CompactNumbersUnitTest.java b/core-java-modules/core-java-12/src/test/java/com/baeldung/newfeatures/CompactNumbersUnitTest.java new file mode 100644 index 0000000000..08a6d58d72 --- /dev/null +++ b/core-java-modules/core-java-12/src/test/java/com/baeldung/newfeatures/CompactNumbersUnitTest.java @@ -0,0 +1,21 @@ +package java.com.baeldung.newfeatures; + +import org.junit.Test; + +import java.text.NumberFormat; +import java.util.Locale; + +import static org.junit.Assert.assertEquals; + +public class CompactNumbersUnitTest { + + @Test + public void givenNumber_thenCompactValues() { + NumberFormat likesShort = NumberFormat.getCompactNumberInstance(new Locale("en", "US"), NumberFormat.Style.SHORT); + likesShort.setMaximumFractionDigits(2); + assertEquals("2.59K", likesShort.format(2592)); + NumberFormat likesLong = NumberFormat.getCompactNumberInstance(new Locale("en", "US"), NumberFormat.Style.LONG); + likesLong.setMaximumFractionDigits(2); + assertEquals("2.59 thousand", likesShort.format(2592)); + } +} diff --git a/core-java-modules/core-java-12/src/test/java/com/baeldung/newfeatures/FileMismatchUnitTest.java b/core-java-modules/core-java-12/src/test/java/com/baeldung/newfeatures/FileMismatchUnitTest.java new file mode 100644 index 0000000000..7f081fe399 --- /dev/null +++ b/core-java-modules/core-java-12/src/test/java/com/baeldung/newfeatures/FileMismatchUnitTest.java @@ -0,0 +1,32 @@ +package java.com.baeldung.newfeatures; + +import org.junit.Test; + +import java.io.IOException; +import java.nio.file.Files; +import java.nio.file.Path; + +import static org.junit.Assert.assertEquals; + +public class FileMismatchUnitTest { + + @Test + public void givenIdenticalFiles_thenShouldNotFindMismatch() throws IOException { + Path filePath1 = Files.createTempFile("file1", ".txt"); + Path filePath2 = Files.createTempFile("file2", ".txt"); + Files.writeString(filePath1, "Java 12 Article"); + Files.writeString(filePath2, "Java 12 Article"); + long mismatch = Files.mismatch(filePath1, filePath2); + assertEquals(-1, mismatch); + } + + @Test + public void givenDifferentFiles_thenShouldFindMismatch() throws IOException { + Path filePath3 = Files.createTempFile("file3", ".txt"); + Path filePath4 = Files.createTempFile("file4", ".txt"); + Files.writeString(filePath3, "Java 12 Article"); + Files.writeString(filePath4, "Java 12 Tutorial"); + long mismatch = Files.mismatch(filePath3, filePath4); + assertEquals(8, mismatch); + } +} diff --git a/core-java-modules/core-java-12/src/test/java/com/baeldung/newfeatures/StringUnitTest.java b/core-java-modules/core-java-12/src/test/java/com/baeldung/newfeatures/StringUnitTest.java new file mode 100644 index 0000000000..5ae51bd960 --- /dev/null +++ b/core-java-modules/core-java-12/src/test/java/com/baeldung/newfeatures/StringUnitTest.java @@ -0,0 +1,15 @@ +package java.com.baeldung.newfeatures; + +import org.junit.Test; + +import static org.junit.Assert.assertEquals; + +public class StringUnitTest { + + @Test + public void givenString_thenRevertValue() { + String text = "Baeldung"; + String transformed = text.transform(value -> new StringBuilder(value).reverse().toString()); + assertEquals("gnudleaB", transformed); + } +} diff --git a/core-java-modules/core-java-12/src/test/java/com/baeldung/newfeatures/TeeingCollectorUnitTest.java b/core-java-modules/core-java-12/src/test/java/com/baeldung/newfeatures/TeeingCollectorUnitTest.java new file mode 100644 index 0000000000..90fc4eda5e --- /dev/null +++ b/core-java-modules/core-java-12/src/test/java/com/baeldung/newfeatures/TeeingCollectorUnitTest.java @@ -0,0 +1,18 @@ +package java.com.baeldung.newfeatures; + +import org.junit.Test; + +import java.util.stream.Collectors; +import java.util.stream.Stream; + +import static org.junit.Assert.assertEquals; + +public class TeeingCollectorUnitTest { + + @Test + public void givenSetOfNumbers_thenCalculateAverage() { + double mean = Stream.of(1, 2, 3, 4, 5) + .collect(Collectors.teeing(Collectors.summingDouble(i -> i), Collectors.counting(), (sum, count) -> sum / count)); + assertEquals(3.0, mean); + } +} From c79e7d8cbdf130e36412289d1f6c24070617a142 Mon Sep 17 00:00:00 2001 From: krzysztof Date: Wed, 23 Dec 2020 12:48:07 +0100 Subject: [PATCH 2/2] BAEL-4750 Java 12 New Features --- .../java/com/baeldung/newfeatures/TeeingCollectorUnitTest.java | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/core-java-modules/core-java-12/src/test/java/com/baeldung/newfeatures/TeeingCollectorUnitTest.java b/core-java-modules/core-java-12/src/test/java/com/baeldung/newfeatures/TeeingCollectorUnitTest.java index 90fc4eda5e..30a5cb40a7 100644 --- a/core-java-modules/core-java-12/src/test/java/com/baeldung/newfeatures/TeeingCollectorUnitTest.java +++ b/core-java-modules/core-java-12/src/test/java/com/baeldung/newfeatures/TeeingCollectorUnitTest.java @@ -12,7 +12,7 @@ public class TeeingCollectorUnitTest { @Test public void givenSetOfNumbers_thenCalculateAverage() { double mean = Stream.of(1, 2, 3, 4, 5) - .collect(Collectors.teeing(Collectors.summingDouble(i -> i), Collectors.counting(), (sum, count) -> sum / count)); + .collect(Collectors.teeing(Collectors.summingDouble(i -> i), Collectors.counting(), (sum, count) -> sum / count)); assertEquals(3.0, mean); } }