Add comprehensive tests for ReAwaitable

Author: proboscis

tests/test_primitives/test_reawaitable/test_reawaitable_concurrency.py

@@ -1,7 +1,7 @@
 import anyio
 import pytest
 
-from returns.primitives.reawaitable import ReAwaitable
+from returns.primitives.reawaitable import ReAwaitable, reawaitable
 
 
 async def sample_coro():
@@ -11,11 +11,54 @@ async def sample_coro():
 
 @pytest.mark.anyio
 async def test_concurrent_awaitable():
-    reawaitable = ReAwaitable(sample_coro())
+    test_target = ReAwaitable(sample_coro())
 
     async def await_reawaitable():
-        return await reawaitable
-
+        return await test_target
     async with anyio.create_task_group() as tg:
         task1 = tg.start_soon(await_reawaitable)
         task2 = tg.start_soon(await_reawaitable)
+
+
+@pytest.mark.anyio
+async def test_reawaitable_decorator():
+    """Test the reawaitable decorator with concurrent awaits."""
+
+    @reawaitable
+    async def decorated_coro():
+        await anyio.sleep(0.1)
+        return "decorated"
+
+    instance = decorated_coro()
+
+    # Test multiple awaits
+    result1 = await instance
+    result2 = await instance
+
+    assert result1 == "decorated"
+    assert result1 == result2
+
+    # Test concurrent awaits
+    async def await_decorated():
+        return await instance
+
+    async with anyio.create_task_group() as tg:
+        task1 = tg.start_soon(await_decorated)
+        task2 = tg.start_soon(await_decorated)
+
+
+@pytest.mark.anyio
+async def test_reawaitable_repr():
+    """Test the __repr__ method of ReAwaitable."""
+    
+    async def test_func():
+        return 1
+    
+    coro = test_func()
+    reawaitable = ReAwaitable(coro)
+    
+    # Test the representation
+    assert repr(reawaitable) == repr(coro)
+    
+    # Ensure the coroutine is properly awaited
+    await reawaitable