BTreeDB Free bitmap, preemtive block allocation (to avoid fragmentation)

gradle.properties

@@ -4,7 +4,7 @@ kotlin.code.style=official
 specifyKotlinAsDependency=false
 
 projectGroup=ru.dbotthepony.kommons
-projectVersion=2.3.3
+projectVersion=2.4.0
 
 guavaDepVersion=33.0.0
 gsonDepVersion=2.8.9

src/test/kotlin/ru/dbotthepony/kommons/test/BTreeDB6Tests.kt

@@ -0,0 +1,29 @@
+package ru.dbotthepony.kommons.test
+
+import org.junit.jupiter.api.DisplayName
+import org.junit.jupiter.api.Test
+import ru.dbotthepony.kommons.io.BTreeDB6
+import ru.dbotthepony.kommons.io.ByteKey
+import java.io.File
+import java.util.concurrent.Executor
+import kotlin.test.assertEquals
+
+object BTreeDB6Tests {
+	@Test
+	@DisplayName("BTreeDB6 Tests")
+	fun test() {
+		val file = File("dbtest.bdb")
+		if (file.exists()) file.delete()
+		val create = BTreeDB6.create(file, Executor { it.run() }, 4096, sync = false)
+
+		for (i in 0 .. 8000) {
+			val s = "This is key $i"
+			val k = ByteKey("This is key $i")
+			println("This is key $i")
+			create.write(k, s.toByteArray())
+			assertEquals(s, String(create.read(k).get().get()))
+		}
+
+		create.close()
+	}
+}

src/test/kotlin/ru/dbotthepony/kommons/test/StreamTests.kt

@@ -11,6 +11,7 @@ import kotlin.test.assertEquals
 object StreamTests {
 	private fun readWrite(value: Int) {
 		val output = FastByteArrayOutputStream()
+		output.writeVarInt(value)
 		val input = FastByteArrayInputStream(output.array, 0, output.length)
 		val r = input.readVarIntInfo()
 		assertEquals(value, r.value)