filesize in humanreadable format (#12012)

2022-04-10 04:02:29 +02:00
parent 3ddf3023c9
commit ee1bc18e04
2 changed files with 121 additions and 0 deletions
@@ -0,0 +1,40 @@
+package com.baeldung.humanreadablebytes;
+
+import org.apache.commons.io.FileUtils;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class FileSizeFormatUtilUnitTest {
+    private final static Map<Long, String> DATA_MAP = new HashMap<Long, String>() {{
+        put(0L, "0 Bytes");
+        put(1023L, "1023 Bytes");
+        put(1024L, "1 KB");
+        put(12_345L, "12.06 KB");
+        put(10_123_456L, "9.65 MB");
+        put(10_123_456_798L, "9.43 GB");
+        put(1_777_777_777_777_777_777L, "1.54 EB");
+    }};
+
+    @Test
+    public void givenBytes_whenCalltoHumanReadableMethod_thenGetExpectedResults() {
+        DATA_MAP.forEach((in, expected) -> Assert.assertEquals(expected, FileSizeFormatUtil.toHumanReadable(in)));
+    }
+
+    @Test
+    public void givenBytes_whenCalltoHumanReadableWithEnumMethod_thenGetExpectedResults() {
+        DATA_MAP.forEach((in, expected) -> Assert.assertEquals(expected, FileSizeFormatUtil.toHumanReadableWithEnum(in)));
+    }
+
+    @Test
+    public void givenBytes_whenCalltoHumanReadableByLeadingZeros_thenGetExpectedResults() {
+        DATA_MAP.forEach((in, expected) -> Assert.assertEquals(expected, FileSizeFormatUtil.toHumanReadableByNumOfLeadingZeros(in)));
+    }
+
+    @Test
+    public void givenBytes_whenCalltoHumanReadableByFileUtils_thenOutputExpectedResults() {
+        DATA_MAP.forEach((in, expected) -> System.out.println(in + " bytes -> " + FileUtils.byteCountToDisplaySize(in)));
+    }
+}