added initial roadmap and implementation

tests/integration/db.test.ts

@@ -0,0 +1,82 @@
+import { describe, it, expect } from 'vitest';
+import { createAnonClient, createServiceRoleClient } from './setup.ts';
+
+const client = createAnonClient();
+const adminClient = createServiceRoleClient();
+
+describe('Data API (PostgREST-lite)', () => {
+  const todoTitle = `Task ${Date.now()}`;
+
+  it('should create a todo', async () => {
+    const { data: rows, error } = await client
+      .from('todos')
+      .insert({ title: todoTitle, completed: false })
+      .select();
+
+    expect(error).toBeNull();
+    expect(rows).toBeDefined();
+    expect(rows?.length).toBe(1);
+    
+    const data = rows![0];
+    expect(data.title).toBe(todoTitle);
+    expect(data.completed).toBe(false);
+  });
+
+  it('should list todos', async () => {
+    const { data, error } = await client.from('todos').select('*');
+
+    expect(error).toBeNull();
+    expect(data).toBeDefined();
+    expect(Array.isArray(data)).toBe(true);
+    expect(data?.length).toBeGreaterThan(0);
+    expect(data?.some((t) => t.title === todoTitle)).toBe(true);
+  });
+
+  it('should update a todo', async () => {
+    // First get the todo
+    const { data: todos } = await client
+      .from('todos')
+      .select('id')
+      .eq('title', todoTitle)
+      .limit(1);
+    
+    expect(todos).toBeDefined();
+    if (!todos || todos.length === 0) throw new Error('Todo not found');
+    const id = todos[0].id;
+
+    const { error } = await client
+      .from('todos')
+      .update({ completed: true })
+      .eq('id', id);
+
+    expect(error).toBeNull();
+    
+    // Verify update
+    const { data: rows } = await client.from('todos').select('*').eq('id', id);
+    expect(rows).toBeDefined();
+    expect(rows?.length).toBe(1);
+    const updated = rows![0];
+    expect(updated.completed).toBe(true);
+  });
+
+  it('should delete a todo', async () => {
+    // First get the todo
+    const { data: todos } = await client
+      .from('todos')
+      .select('id')
+      .eq('title', todoTitle)
+      .limit(1);
+
+    expect(todos).toBeDefined();
+    if (!todos || todos.length === 0) throw new Error('Todo not found');
+    const id = todos[0].id;
+
+    const { error } = await client.from('todos').delete().eq('id', id);
+
+    expect(error).toBeNull();
+
+    // Verify deletion
+    const { data } = await client.from('todos').select('*').eq('id', id);
+    expect(data?.length).toBe(0);
+  });
+});