Incremental manager work.

src/test/kotlin/com/beust/kobalt/internal/IncrementalManagerTest.kt

@@ -0,0 +1,31 @@
+package com.beust.kobalt.internal
+
+import org.testng.Assert
+import org.testng.annotations.Test
+import java.io.File
+
+@Test
+class IncrementalManagerTest {
+    val TASK = "task"
+    val TASK2 = "task2"
+
+    fun shouldSave() {
+        val file = File.createTempFile("kobalt-", "")
+        println("File: $file")
+        val im = IncrementalManager(file.absolutePath)
+        val v = im.inputChecksumFor(TASK)
+        Assert.assertNull(v)
+        im.saveInputChecksum(TASK, "44")
+        Assert.assertEquals(im.inputChecksumFor(TASK), "44")
+        im.saveInputChecksum(TASK, "42")
+        Assert.assertEquals(im.inputChecksumFor(TASK), "42")
+
+        im.saveInputChecksum(TASK2, "45")
+        Assert.assertEquals(im.inputChecksumFor(TASK2), "45")
+
+        Assert.assertEquals(im.inputChecksumFor(TASK), "42")
+
+        im.saveOutputChecksum(TASK, "49")
+        Assert.assertEquals(im.outputChecksumFor(TASK), "49")
+    }
+}