fix calendar discovery parsing and load env config

tests/caldav-client-parsing.test.ts

@@ -0,0 +1,32 @@
+import { describe, expect, it } from "vitest";
+import { hasDavNode, toDavText } from "../src/caldav/client.js";
+
+describe("DAV parsing helpers", () => {
+  it("detects nodes in nested DAV object trees", () => {
+    const resourcetype = {
+      collection: "",
+      calendar: "",
+    };
+
+    expect(hasDavNode(resourcetype, "calendar")).toBe(true);
+    expect(hasDavNode(resourcetype, "write")).toBe(false);
+  });
+
+  it("detects privileges and components in nested values", () => {
+    const privileges = {
+      privilege: [{ read: "" }, { write: "" }],
+    };
+    const components = {
+      comp: [{ "@_name": "VEVENT" }, { "@_name": "VTODO" }],
+    };
+
+    expect(hasDavNode(privileges, "write")).toBe(true);
+    expect(hasDavNode(components, "VEVENT")).toBe(true);
+    expect(hasDavNode(components, "VJOURNAL")).toBe(false);
+  });
+
+  it("extracts text from nested DAV displayname values", () => {
+    expect(toDavText(" Personal Calendar ")).toBe("Personal Calendar");
+    expect(toDavText({ "#text": "Work" })).toBe("Work");
+  });
+});