Move the sbt project to the project root

Author: jonas

tests/build.sbt renamed to build.sbt

@@ -12,21 +12,24 @@ inThisBuild(
     )
   ))
 
-val `scala-native-bindgen-tests` = project
-  .in(file("."))
+val tests = project
+  .in(file("tests"))
   .aggregate(samples)
   .settings(
     fork in Test := true,
-    javaOptions in Test += "-Dbindgen.path=" + file(
-      "../bindgen/target/scala-native-bindgen"),
+    javaOptions in Test += {
+      val rootDir = (ThisBuild / baseDirectory).value
+      s"-Dbindgen.path=$rootDir/bindgen/target/scala-native-bindgen"
+    },
     watchSources += WatchSource(
-      baseDirectory.value / "samples",
+      baseDirectory.value / "tests" / "samples",
       "*.h" || "*.scala",
       NothingFilter
     ),
     libraryDependencies += "org.scalatest" %% "scalatest" % "3.0.5" % Test
   )
 
 lazy val samples = project
+  .in(file("tests/samples"))
   .enablePlugins(ScalaNativePlugin)
   .settings(test := (compile in Compile).value)

tests/project/build.properties renamed to project/build.properties

@@ -13,6 +13,4 @@ if [[ ! -e bindgen/target/.llvm-version ]] || [[ "$(<bindgen/target/.llvm-versio
 fi
 
 make -C bindgen/target
-
-cd tests
 sbt "${@:-test}"

tests/project/plugins.sbt renamed to project/plugins.sbt

@@ -15,7 +15,7 @@ class BindgenSpec extends FunSpec {
     outputDir.mkdirs()
 
     it("should exist") {
-      assert(new File(bindgenPath).exists)
+      assert(new File(bindgenPath).exists, s"$bindgenPath does not exist")
     }
 
     def bindgen(inputFile: File, name: String, outputFile: File): Unit = {