fix: make returned paths absolute (#29)

Author: jGleitz

src/main/kotlin/de/joshuagleitze/test/spek/testfiles/DefaultTestFiles.kt

@@ -141,7 +141,7 @@ class DefaultTestFiles internal constructor(): LifecycleListener, TestFiles {
 			isDirectory(Paths.get("target")) -> Paths.get("target/test-outputs")
 			isDirectory(Paths.get("test-outputs")) -> Paths.get("test-outputs")
 			else -> Paths.get(System.getProperty("java.io.tmpdir")).resolve("spek-test-outputs")
-		}
+		}.toAbsolutePath()
 
 		private fun checkFileName(name: String) {
 			require(!name.matches(Regex("^\\[.*]$"))) { "A test file name must not start with '[' and end with ']'! was: '$name'" }

src/main/kotlin/de/joshuagleitze/test/spek/testfiles/TestFiles.kt

@@ -6,14 +6,17 @@ import java.nio.file.Path
 /**
  * Helper that creates test files and directories for use in tests. The helper manages a directory structures that reflects the structure of
  * the Spek tests. Created files and directories will reside in the part of the directory structure that corresponds to the current Spek
- * group or test. The helper also manages when to delete the created files, see [DeletionMode].
+ * group or test. The helper also manages when to delete the created files.
+ *
+ * @see DeletionMode
  */
 interface TestFiles {
 	/**
 	 * Creates a test directory in the directory of the current Spek group or test.
 	 *
 	 * @param name The name of the directory. If omitted or `null`, the name will be generated.
 	 * @param delete When to delete the created directory, see [DeletionMode].
+	 * @return The absolute [Path] to the created directory.
 	 */
 	fun createDirectory(name: String? = null, delete: DeletionMode = IF_SUCCESSFUL): Path
 
@@ -22,6 +25,7 @@ interface TestFiles {
 	 *
 	 * @param name The name of the file. If omitted or `null`, the name will be generated.
 	 * @param delete When to delete the created file, see [DeletionMode].
+	 * @return The absolute [Path] to the created file.
 	 */
 	fun createFile(name: String? = null, delete: DeletionMode = IF_SUCCESSFUL): Path
 }