fix(curriculum): update email simulator tests (freeCodeCamp#63803)

Author: Dario-DC

curriculum/challenges/english/blocks/workshop-email-simulator/685cdfd1932d8ac6ad986813.md

@@ -15,29 +15,50 @@ Here is an example:
 
 ```py
 x = 10
-y = 'Even' if x % 2 == 0 else 'Odd' # y will be even
+y = 'Even' if x % 2 == 0 else 'Odd' # y will be Even
 ```
 
 Within the method, before, use conditional expression to assign the string `Read` to a variable `status` if the email is read and `Unread` if it is not. 
 
 # --hints--
 
-The `__str__` method should create a `status` variable that uses a conditional expression.
+You should have a `status` variable within the `__str__` method.
 
 ```js
 ({
     test: () => {
-        assert(runPython(`_Node(_code).find_class("Email").find_function("__str__").has_stmt("status = 'Read' if self.read else 'Unread'")`));
+        assert(runPython(`_Node(_code).find_class("Email").find_function("__str__").has_variable("status")`));
     }
 })
 ```
 
-The `__str__` method should return the email information with the status included.
+You should assign a conditional expression to the `status` variable.
 
 ```js
 ({
     test: () => {
-        assert(runPython(`_Node(_code).find_class("Email").find_function("__str__").has_variable("status")`));
+        runPython(`
+        import ast
+        assert isinstance(_Node(_code).find_class("Email").find_function("__str__").find_variable("status").tree.value, ast.IfExp)`);
+    }
+})
+```
+
+Your conditional expression should evaluate to the string `Read` if the email is read and `Unread` if it is not.
+
+```js
+({
+    test: () => {
+        runPython(`
+        if_exps = [
+          "'Read' if self.read else 'Unread'",
+          "'Read' if self.read == True else 'Unread'",
+          "'Unread' if not self.read else 'Read'",
+          "'Unread' if self.read == False else 'Read'"
+        ]
+        foo = _Node(_code).find_class("Email").find_function("__str__")
+        assert any(foo.has_stmt(f"status = {if_exp}") for if_exp in if_exps)
+        `);
     }
 })
 ```