Improving test coverage for FileWorkspaceMap

Author: PicoCreator

src/main/java/picoded/dstack/core/Core_FileWorkspaceMap.java

@@ -554,7 +554,7 @@ protected Set<String> backend_filterPathSet(final Set<String> rawSet, final Stri
 
 		// Normalize the folder path
 		String searchPath = folderPath;
-		if (searchPath.equals("/")) {
+		if (searchPath == null || searchPath.equals("/")) {
 			searchPath = "";
 		}
 		int searchPathLen = searchPath.length();

src/main/java/picoded/dstack/mongodb/MongoDB_FileWorkspaceMap.java

@@ -828,7 +828,7 @@ public Set<String> backend_getFileAndFolderPathSet(final String oid, String fold
 		// Lets build the query for the "root file"
 		Bson query = null;
 
-		// The fulle prefix path
+		// The fuller prefix path
 		String fullPrefixPath = oid + "/";
 
 		if (folderPath == null || folderPath.equals("/") || folderPath.isEmpty()) {

src/test/java/picoded/dstack/struct/simple/StructSimple_FileWorkspaceMap_test.java

@@ -348,7 +348,12 @@ public void getPathSetLookup() {
 		fileWorkspace.writeString("test/d1/file.txt", "anything");
 		fileWorkspace.writeString("test/d2/file.txt", "anything");
 
-		// List files and folders
+		// List all files and folders
+		assertEquals(4, fileWorkspace.getFileAndFolderPathSet(null).size());
+		assertEquals(4, fileWorkspace.getFileAndFolderPathSet("").size());
+		assertEquals(4, fileWorkspace.getFileAndFolderPathSet("/").size());
+
+		// List files in sub folders
 		assertEquals(4, fileWorkspace.getFileAndFolderPathSet("test").size());
 		assertEquals(2, fileWorkspace.getFilePathSet("test").size());
 		assertEquals(2, fileWorkspace.getFolderPathSet("test").size());