Refactor config validation

modules/config/src/test/scala/docspell/config/ValidationTest.scala

@@ -0,0 +1,25 @@
+/*
+ * Copyright 2020 Eike K. & Contributors
+ *
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+package docspell.config
+
+import munit.FunSuite
+
+class ValidationTest extends FunSuite {
+
+  test("thread value through validations") {
+    val v1 = Validation[Int](n => Validation.valid(n + 1))
+    assertEquals(v1.validOrThrow(0), 1)
+    assertEquals(Validation.of(v1, v1, v1).validOrThrow(0), 3)
+  }
+
+  test("fail if there is at least one error") {
+    val v1 = Validation[Int](n => Validation.valid(n + 1))
+    val v2 = Validation.error[Int]("error")
+    assertEquals(Validation.of(v1, v2).run(0), Validation.invalid("error"))
+    assertEquals(Validation.of(v2, v1).run(0), Validation.invalid("error"))
+  }
+}