Add test case for RiddlFilesTestBase

* Also move IncludeAndImportTest to tests not main!

Signed-off-by: reidspencer <reid.spencer@yoppworks.com>

testkit/src/test/scala/com/reactific/riddl/testkit/RiddlFilesTestBaseTest.scala

@@ -0,0 +1,35 @@
+package com.reactific.riddl.testkit
+
+import org.scalatest.Assertion
+
+import java.io.File
+import java.nio.file.Path
+
+class RiddlFilesTestBaseTest extends RiddlFilesTestBase {
+
+  def checkAFile(rootDir: Path, file: File): Assertion = {
+    succeed
+  }
+
+  "RiddlFilesTestBase" should {
+    "find riddl files" in {
+      val dir = "testkit/src/test/input"
+      val files = findRiddlFiles(new File(dir), true)
+      files.size must be > 0
+    }
+    "not find non-files" in {
+      intercept[org.scalatest.exceptions.TestFailedException] {
+        processAFile("foo.txt")
+      }
+    }
+    "require .riddl suffix" in {
+      intercept[org.scalatest.exceptions.TestFailedException] {
+        processAFile("testkit/src/test/input/hugo.conf")
+      }
+    }
+    "handle a file or directory" in {
+      processADirectory("testkit/src/test/input/hugo.conf")
+      processADirectory("testkit/src/test/input/domains")
+    }
+  }
+}