setPacth() method added

Author: host6

src/main/java/org/scm4j/commons/Version.java

@@ -212,4 +212,11 @@ public Version setMinor(String minor) {
 		return new Version(prefix + minor + (patch.isEmpty() ? "" : "." + patch) + snapshot);
 
 	}
+
+	public Version setPatch(String patch) {
+		if (!isSemantic) {
+			throw new IllegalStateException("can not set patch for non-semantic version");
+		}
+		return new Version(prefix + minor + (patch.isEmpty() ? "" : "." + patch) + snapshot);
+	}
 }

src/test/java/org/scm4j/commons/VersionTest.java

@@ -205,4 +205,25 @@ public void testSetMinor() {
 		}
 		assertEquals(new Version("14-SNAPSHOT"), new Version("12-SNAPSHOT").setMinor("14"));
 	}
+
+	@Test
+	public void testSetPatch() {
+		assertEquals("12.13.14.0-SNAPSHOT", new Version("12.13.14.15-SNAPSHOT").setPatch("0").toString());
+		assertEquals("12.13.14.0", new Version("12.13.14.15").setPatch("0").toString());
+		assertEquals("12.13.0", new Version("12.13.14").setPatch("0").toString());
+		assertEquals("12.0", new Version("12.13").setPatch("0").toString());
+		assertEquals("12.0", new Version("12").setPatch("0").toString());
+		try {
+			new Version("").setPatch("0");
+			fail();
+		} catch (IllegalStateException e) {
+		}
+		try {
+			new Version("non semantic").setPatch("0");
+			fail();
+		} catch (IllegalStateException e) {
+		}
+
+
+	}
 }