test which verifies the dates in each file are monotonically increasing

performanceDb/src/main/java/org/lucares/performance/db/PdbWriter.java

@@ -34,7 +34,6 @@ class PdbWriter implements AutoCloseable {
 	}
 
 	public void write(final Entry entry) throws WriteException {
-		// System.out.println(entry);
 		write(entry.getEpochMilli(), entry.getValue());
 	}
 
@@ -81,6 +80,14 @@ class PdbWriter implements AutoCloseable {
 		}
 	}
 
+	public static void writeEntry(final PdbFile pdbFile, final Entry... entries) throws IOException {
+		try (PdbWriter writer = new PdbWriter(pdbFile)) {
+			for (final Entry entry : entries) {
+				writer.write(entry);
+			}
+		}
+	}
+
 	@Override
 	public void close() throws IOException {
 		outputStream.flush();

performanceDb/src/test/java/org/lucares/performance/db/TagsToFilesTest.java

@@ -9,6 +9,7 @@ import java.time.ZoneOffset;
 
 import org.lucares.ludb.FieldType;
 import org.lucares.ludb.H2DB;
+import org.lucares.pdb.api.Entry;
 import org.lucares.pdb.api.Tags;
 import org.testng.Assert;
 import org.testng.annotations.AfterMethod;
@@ -70,4 +71,47 @@ public class TagsToFilesTest {
 			Assert.assertEquals(fileForDay1, existingFileForDay1);
 		}
 	}
+
+	public void testNewFileIfDateIsTooOld() throws Exception {
+
+		try (H2DB db = new H2DB(new File(dataDirectory.toFile(), "lu.db"))) {
+			db.createField(Fields.DATE_OFFSET, FieldType.STRING);
+
+			final TagsToFile tagsToFile = new TagsToFile(dataDirectory, db);
+
+			final OffsetDateTime afternoon = DateUtils.getDate(2016, 1, 1, 13, 1, 1);
+			final OffsetDateTime morning = DateUtils.getDate(2016, 1, 1, 12, 1, 1);
+
+			final Tags tags = Tags.create("myKey", "myValue");
+
+			final PdbFile fileAfternoon = tagsToFile.getFile(afternoon, tags);
+			PdbWriter.writeEntry(fileAfternoon, new Entry(afternoon, 1, tags));
+
+			final PdbFile fileMorning = tagsToFile.getFile(morning, tags);
+
+			Assert.assertNotEquals(fileAfternoon, fileMorning);
+		}
+	}
+
+	public void testIdenticalDatesGoIntoSameFile() throws Exception {
+
+		try (H2DB db = new H2DB(new File(dataDirectory.toFile(), "lu.db"))) {
+			db.createField(Fields.DATE_OFFSET, FieldType.STRING);
+
+			final TagsToFile tagsToFile = new TagsToFile(dataDirectory, db);
+
+			final OffsetDateTime timestamp = DateUtils.getDate(2016, 1, 1, 13, 1, 1);
+
+			final Tags tags = Tags.create("myKey", "myValue");
+
+			final PdbFile fileA = tagsToFile.getFile(timestamp, tags);
+			PdbWriter.writeEntry(fileA, new Entry(timestamp, 1, tags));
+
+			final PdbFile fileB = tagsToFile.getFile(timestamp, tags);
+			PdbWriter.writeEntry(fileA, new Entry(timestamp, 2, tags));
+
+			Assert.assertEquals(fileA, fileB);
+		}
+	}
+
 }