ImfsContext supports rmdir

README.md

@@ -25,8 +25,8 @@
 - [x] Create a new directory. The current working directory is the parent.
 - [x] Get the directory contents: Returns the children of the current working directory.
       Example: [‘math’, ‘history’, ‘spanish’]
-- [] Remove a directory. The target directory must be among the current working directory’s
-  children.
+- [x] Remove a directory. The target directory must be among the current working directory’s
+      children.
 - [] Create a new file: Creates a new empty file in the current working directory.
 - [] Write file contents: Writes the specified contents to a file in the current working
   directory. All file contents will fit into memory.

src/main/java/com/imfs/ImfsContext.java

@@ -59,4 +59,8 @@ public ImfsContext cd(String string) {
         return null;
     }
 
+    public void rmdir(String string) throws IOException {
+        Files.delete(this.path.resolve(string));
+    }
+
 }

src/main/java/com/imfs/ImfsFileSystem.java

@@ -126,4 +126,8 @@ public boolean contains(String kid) {
     public void reset() {
         entries = initEntries(key);
     }
+
+    public void removeEntry(String kid) {
+        entries.remove(kid);
+    }
 }

src/main/java/com/imfs/ImfsProvider.java

@@ -57,9 +57,11 @@ public void createDirectory(Path path, FileAttribute<?>... arg1) throws IOExcept
     }
 
     @Override
-    public void delete(Path arg0) throws IOException {
-        // TODO Auto-generated method stub
-        throw new UnsupportedOperationException("Unimplemented method 'delete'");
+    public void delete(Path path) throws IOException {
+        var imfsPath = checkPath(path);
+        var fileSystem = (ImfsFileSystem) imfsPath.getFileSystem();
+        var kid = imfsPath.getMaterializedPath();
+        fileSystem.removeEntry(kid);
     }
 
     @Override

src/test/java/com/imfs/ImfsContextTest.java

@@ -5,6 +5,7 @@
 
 import java.io.IOException;
 import java.net.URI;
+import java.nio.file.Files;
 import java.nio.file.Paths;
 
 import org.junit.Before;
@@ -86,4 +87,18 @@ public void testCdLevels() throws IOException {
         assertEquals(0, foo.ls().size());
     }
 
+    @Test
+    public void testRmdir() throws IOException {
+        var context = new ImfsContext("imfs://ImfsContextTest/");
+        var kids = context.ls();
+        assertArrayEquals(new String[] { "math", "history", "spanish" }, kids.toArray());
+
+        var history = Paths.get(URI.create("imfs://ImfsContextTest/history"));
+        assertEquals(true, Files.isDirectory(history));
+
+        context.rmdir("history");
+        kids = context.ls();
+        assertArrayEquals(new String[] { "math", "spanish" }, kids.toArray());
+        assertEquals(false, Files.isDirectory(history));
+    }
 }