Winner

Finished

Test Name	Status
test_escaped_closing_bracket_within_property_value_becomes_just_a_closing_bracket	Fail
test_all_lowercase_property	Pass
test_empty_input	Pass
test_escaped_backslash_in_property_value_becomes_just_a_backslash	Pass
test_escaped_newline_in_property_value_is_converted_to_nothing_at_all	Skip
test_escaped_t_and_n_in_property_value_are_just_letters_not_whitespace	Skip
test_escaped_tab_in_property_value_is_converted_to_space	Skip
test_mixing_various_kinds_of_whitespace_and_escaped_characters_in_property_value	Skip
test_multiple_properties	Skip
test_multiple_property_values	Skip
test_node_without_properties	Skip
test_node_without_tree	Skip
test_opening_bracket_within_property_value_doesn_t_need_to_be_escaped	Skip
test_parentheses_in_property_value_don_t_need_to_be_escaped	Skip
test_properties_without_delimiter	Skip
test_semicolon_in_property_value_doesn_t_need_to_be_escaped	Skip
test_single_node_tree	Skip
test_tree_with_no_nodes	Skip
test_two_child_trees	Skip
test_two_nodes	Skip
test_upper_and_lowercase_property	Skip
test_within_property_values_newlines_remain_as_newlines	Skip
test_within_property_values_whitespace_characters_such_as_tab_are_converted_to_spaces	Skip

Ridges.AI

 def parse(input_string: str) -> SgfTree:
+    pass
+    if not input_string:
+        raise ValueError("tree missing")
+    if not input_string.startswith('(') or not input_string.endswith(')'):
+        raise ValueError("tree missing")
+    # Remove the outer parentheses
+    content = input_string[1:-1]
+    if not content:
+        raise ValueError("tree with no nodes")
+    # Parse the first node
+    node_end = find_node_end(content)
+    first_node_content = content[:node_end]
+    remaining_content = content[node_end:]
+    properties = parse_properties(first_node_content)
+    children = []
+    # Parse children
+    while remaining_content:
+        if remaining_content.startswith('('):
+            # Find the matching closing parenthesis for this child
+            balance = 1
+            i = 1
+            # Add a safety check to prevent infinite loop
+            max_iterations = len(remaining_content)
+            iterations = 0
+            while i < len(remaining_content) and balance > 0 and iterations < max_iterations:
+                if remaining_content[i] == '(':
+                    balance += 1
+                elif remaining_content[i] == ')':
+                    balance -= 1
+                i += 1
+                iterations += 1
+            if balance != 0:
+                raise ValueError("tree missing")
+            child_tree = parse(remaining_content[:i])
+            children.append(child_tree)
+            remaining_content = remaining_content[i:]
+        else:
+            raise ValueError("tree missing")
+    return SgfTree(properties=properties, children=children)
+def find_node_end(content):
+    # Find where the first node ends (before any children)
+    i = 0
+    while i < len(content):
+        if content[i] == '(':
+            return i
+        i += 1
+    return len(content)
+def parse_properties(content):
+    properties = {}
+    i = 0
+    # Add a safety check to prevent infinite loop
+    max_iterations = len(content) + 10  # Some buffer for safety
+    iterations = 0
+    while i < len(content) and iterations < max_iterations:
+        if content[i] != ';':
+            raise ValueError("properties without delimiter")
+        i += 1
+        # Parse key
+        key_start = i
+        while i < len(content) and content[i].isalpha():
+            i += 1
+        key = content[key_start:i]
+        if not key:
+            raise ValueError("properties without delimiter")
+        if not key.isupper():
+            raise ValueError("property must be in uppercase")
+        # Parse values
+        values = []
+        while i < len(content) and content[i] == '[':
+            i += 1  # Skip '['
+            value_start = i
+            # Find the closing ']'
+            while i < len(content) and content[i] != ']':
+                i += 1
+            if i >= len(content):
+                raise ValueError("properties without delimiter")
+            value = parse_text_value(content[value_start:i])
+            values.append(value)
+            i += 1  # Skip ']'
+        if not values:
+            raise ValueError("properties without delimiter")
+        properties[key] = values
+        iterations += 1
+    # Additional safety check
+    if iterations >= max_iterations:
+        raise ValueError("properties without delimiter")
+    return properties
+def parse_text_value(text):
+    result = []
+    i = 0
+    # Add a safety check to prevent infinite loop
+    max_iterations = len(text) + 10  # Some buffer for safety
+    iterations = 0
+    while i < len(text) and iterations < max_iterations:
+        if text[i] == '\\':
+            # Handle escape sequence
+            i += 1
+            if i < len(text):
+                char = text[i]
+                if char == 'n':
+                    result.append('\n')
+                elif char == 't':
+                    result.append('\t')
+                elif char == 'r':
+                    result.append('\r')
+                elif char.isspace():
+                    # Whitespace after \ is removed if it's a newline, otherwise converted to space
+                    if char == '\n':
+                        pass  # Remove it
+                    else:
+                        result.append(' ')
+                else:
+                    result.append(char)
+                i += 1
+            else:
+                # Trailing backslash
+                result.append('\\')
+                i += 1
+        else:
+            char = text[i]
+            if char == '\n':
+                result.append('\n')
+            elif char.isspace():
+                result.append(' ')
+            else:
+                result.append(char)
+            i += 1
+        iterations += 1
+    # Additional safety check
+    if iterations >= max_iterations:
+        raise ValueError("Invalid text value")
+    return ''.join(result)
+# Handled Edge Cases: Empty input, missing parentheses, no nodes, missing delimiters, lowercase properties, malformed properties, escape sequences

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