etapi test infrastructure plus a basic note creation test

spec/etapi/notes.js

@@ -0,0 +1,27 @@
+const {describeEtapi, postEtapi, getEtapi, getEtapiContent} = require("../support/etapi");
+
+describeEtapi("notes", () => {
+    it("create", async () => {
+        const {note, branch} = await postEtapi('create-note', {
+            parentNoteId: 'root',
+            type: 'text',
+            title: 'Hello World!',
+            content: 'Content',
+            prefix: 'Custom prefix'
+        });
+
+        expect(note.title).toEqual("Hello World!");
+        expect(branch.parentNoteId).toEqual("root");
+        expect(branch.prefix).toEqual("Custom prefix");
+
+        const rNote = await getEtapi(`notes/${note.noteId}`);
+        expect(rNote.title).toEqual("Hello World!");
+
+        const rContent = await getEtapiContent(`notes/${note.noteId}/content`);
+        expect(rContent).toEqual("Content");
+
+        const rBranch = await getEtapi(`branches/${branch.branchId}`);
+        expect(rBranch.parentNoteId).toEqual("root");
+        expect(rBranch.prefix).toEqual("Custom prefix");
+    });
+});