Get workspace module in and compiling

zed/src/test.rs

@@ -1,5 +1,9 @@
 use rand::Rng;
-use std::collections::BTreeMap;
+use std::{
+    collections::BTreeMap,
+    path::{Path, PathBuf},
+};
+use tempdir::TempDir;
 
 use crate::time::ReplicaId;
 
@@ -97,3 +101,38 @@ pub fn sample_text(rows: usize, cols: usize) -> String {
     }
     text
 }
+
+pub fn temp_tree(tree: serde_json::Value) -> TempDir {
+    let dir = TempDir::new("").unwrap();
+    write_tree(dir.path(), tree);
+    dir
+}
+
+fn write_tree(path: &Path, tree: serde_json::Value) {
+    use serde_json::Value;
+    use std::fs;
+
+    if let Value::Object(map) = tree {
+        for (name, contents) in map {
+            let mut path = PathBuf::from(path);
+            path.push(name);
+            match contents {
+                Value::Object(_) => {
+                    fs::create_dir(&path).unwrap();
+                    write_tree(&path, contents);
+                }
+                Value::Null => {
+                    fs::create_dir(&path).unwrap();
+                }
+                Value::String(contents) => {
+                    fs::write(&path, contents).unwrap();
+                }
+                _ => {
+                    panic!("JSON object must contain only objects, strings, or null");
+                }
+            }
+        }
+    } else {
+        panic!("You must pass a JSON object to this helper")
+    }
+}