tests/cmdline: Add a test for REPL paste mode.

Signed-off-by: Andrew Leech <andrew.leech@planetinnovation.com.au>

pyproject.toml

@@ -33,6 +33,7 @@ exclude = [  # Ruff finds Python SyntaxError in these files
   "tests/cmdline/repl_basic.py",
   "tests/cmdline/repl_cont.py",
   "tests/cmdline/repl_emacs_keys.py",
+  "tests/cmdline/repl_paste.py",
   "tests/cmdline/repl_words_move.py",
   "tests/feature_check/repl_emacs_check.py",
   "tests/feature_check/repl_words_move_check.py",

tests/cmdline/repl_paste.py

@@ -0,0 +1,90 @@
+# Test REPL paste mode functionality
+
+# Basic paste mode with a simple function
+{\x05}
+def hello():
+    print('Hello from paste mode!')
+hello()
+{\x04}
+
+# Paste mode with multiple indentation levels
+{\x05}
+def calculate(n):
+    if n > 0:
+        for i in range(n):
+            if i % 2 == 0:
+                print(f'Even: {i}')
+            else:
+                print(f'Odd: {i}')
+    else:
+        print('n must be positive')
+
+calculate(5)
+{\x04}
+
+# Paste mode with blank lines
+{\x05}
+def function_with_blanks():
+    print('First line')
+    
+    print('After blank line')
+    
+    
+    print('After two blank lines')
+
+function_with_blanks()
+{\x04}
+
+# Paste mode with class definition and multiple methods
+{\x05}
+class TestClass:
+    def __init__(self, value):
+        self.value = value
+    
+    def display(self):
+        print(f'Value is: {self.value}')
+    
+    def double(self):
+        self.value *= 2
+        return self.value
+
+obj = TestClass(21)
+obj.display()
+print(f'Doubled: {obj.double()}')
+obj.display()
+{\x04}
+
+# Paste mode with exception handling
+{\x05}
+try:
+    x = 1 / 0
+except ZeroDivisionError:
+    print('Caught division by zero')
+finally:
+    print('Finally block executed')
+{\x04}
+
+# Cancel paste mode with Ctrl-C
+{\x05}
+print('This should not execute')
+{\x03}
+
+# Normal REPL still works after cancelled paste
+print('Back to normal REPL')
+
+# Paste mode with syntax error
+{\x05}
+def bad_syntax(:
+    print('Missing parameter')
+{\x04}
+
+# Paste mode with runtime error
+{\x05}
+def will_error():
+    undefined_variable
+    
+will_error()
+{\x04}
+
+# Final test to show REPL is still functioning
+1 + 2 + 3

tests/cmdline/repl_paste.py.exp

@@ -0,0 +1,133 @@
+MicroPython \.\+ version
+Use Ctrl-D to exit, Ctrl-E for paste mode
+>>> # Test REPL paste mode functionality
+>>> 
+>>> # Basic paste mode with a simple function
+>>> 
+paste mode; Ctrl-C to cancel, Ctrl-D to finish
+=== 
+=== def hello():
+===     print('Hello from paste mode!')
+=== hello()
+=== 
+Hello from paste mode!
+>>> 
+>>> # Paste mode with multiple indentation levels
+>>> 
+paste mode; Ctrl-C to cancel, Ctrl-D to finish
+=== 
+=== def calculate(n):
+===     if n > 0:
+===         for i in range(n):
+===             if i % 2 == 0:
+===                 print(f'Even: {i}')
+===             else:
+===                 print(f'Odd: {i}')
+===     else:
+===         print('n must be positive')
+=== 
+=== calculate(5)
+=== 
+Even: 0
+Odd: 1
+Even: 2
+Odd: 3
+Even: 4
+>>> 
+>>> # Paste mode with blank lines
+>>> 
+paste mode; Ctrl-C to cancel, Ctrl-D to finish
+=== 
+=== def function_with_blanks():
+===     print('First line')
+===     
+===     print('After blank line')
+===     
+===     
+===     print('After two blank lines')
+=== 
+=== function_with_blanks()
+=== 
+First line
+After blank line
+After two blank lines
+>>> 
+>>> # Paste mode with class definition and multiple methods
+>>> 
+paste mode; Ctrl-C to cancel, Ctrl-D to finish
+=== 
+=== class TestClass:
+===     def __init__(self, value):
+===         self.value = value
+===     
+===     def display(self):
+===         print(f'Value is: {self.value}')
+===     
+===     def double(self):
+===         self.value *= 2
+===         return self.value
+=== 
+=== obj = TestClass(21)
+=== obj.display()
+=== print(f'Doubled: {obj.double()}')
+=== obj.display()
+=== 
+Value is: 21
+Doubled: 42
+Value is: 42
+>>> 
+>>> # Paste mode with exception handling
+>>> 
+paste mode; Ctrl-C to cancel, Ctrl-D to finish
+=== 
+=== try:
+===     x = 1 / 0
+=== except ZeroDivisionError:
+===     print('Caught division by zero')
+=== finally:
+===     print('Finally block executed')
+=== 
+Caught division by zero
+Finally block executed
+>>> 
+>>> # Cancel paste mode with Ctrl-C
+>>> 
+paste mode; Ctrl-C to cancel, Ctrl-D to finish
+=== 
+=== print('This should not execute')
+=== 
+>>> 
+>>> 
+>>> # Normal REPL still works after cancelled paste
+>>> print('Back to normal REPL')
+Back to normal REPL
+>>> 
+>>> # Paste mode with syntax error
+>>> 
+paste mode; Ctrl-C to cancel, Ctrl-D to finish
+=== 
+=== def bad_syntax(:
+===     print('Missing parameter')
+=== 
+Traceback (most recent call last):
+  File "<stdin>", line 2
+SyntaxError: invalid syntax
+>>> 
+>>> # Paste mode with runtime error
+>>> 
+paste mode; Ctrl-C to cancel, Ctrl-D to finish
+=== 
+=== def will_error():
+===     undefined_variable
+===     
+=== will_error()
+=== 
+Traceback (most recent call last):
+  File "<stdin>", line 5, in <module>
+  File "<stdin>", line 3, in will_error
+NameError: name 'undefined_variable' isn't defined
+>>> 
+>>> # Final test to show REPL is still functioning
+>>> 1 + 2 + 3
+6
+>>>