hangman

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")
+    return _parse_tree(content)
+def _parse_tree(content: str) -> SgfTree:
+    if not content:
+        raise ValueError("tree with no nodes")
+    # Find the first semicolon to separate the node from children
+    if content[0] != ';':
+        raise ValueError("tree with no nodes")
+    # Parse the current node
+    node_content, children_content = _split_node_and_children(content[1:])
+    properties = _parse_properties(node_content)
+    # Parse children
+    children = []
+    if children_content:
+        child_trees = _parse_children(children_content)
+        children.extend(child_trees)
+    return SgfTree(properties=properties, children=children)
+def _split_node_and_children(content: str) -> tuple[str, str]:
+    # Find where the current node ends and children begin
+    # Children are enclosed in parentheses
+    node_part = ""
+    i = 0
+    while i < len(content):
+        if content[i] == '(':
+            # Found start of children
+            break
+        node_part += content[i]
+        i += 1
+    children_part = content[i:] if i < len(content) else ""
+    return node_part, children_part
+def _parse_properties(content: str) -> dict:
+    properties = {}
+    if not content:
+        return properties
+    i = 0
+    while i < len(content):
+        # Parse key
+        if not content[i].isalpha() or not content[i].isupper():
+            raise ValueError("property must be in uppercase")
+        key_start = i
+        while i < len(content) and content[i].isalpha() and content[i].isupper():
+            i += 1
+        if i == key_start:
+            raise ValueError("property must be in uppercase")
+        key = content[key_start:i]
+        # Check for values
+        if i >= len(content) or content[i] != '[':
+            raise ValueError("properties without delimiter")
+        # Parse all values for this key
+        values = []
+        while i < len(content) and content[i] == '[':
+            i += 1  # Skip '['
+            value_start = i
+            # Find the matching ']'
+            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 ']'
+        properties[key] = values
+    return properties
+def _parse_text_value(text: str) -> str:
+    result = []
+    i = 0
+    while i < len(text):
+        if text[i] == '\\':
+            # Handle escape character
+            i += 1
+            if i < len(text):
+                # Check if next character is whitespace
+                if text[i] in ' \t\n':
+                    # According to SGF spec, whitespace after \ is processed normally
+                    if text[i] == '\n':
+                        # Newlines are removed if they come immediately after \
+                        pass
+                    else:
+                        # Other whitespace converted to space
+                        result.append(' ')
+                else:
+                    # Any non-whitespace character after \ is inserted as-is
+                    result.append(text[i])
+            else:
+                # Escape at end of string
+                result.append('\\')
+        else:
+            # Handle regular characters
+            if text[i] == '\n':
+                result.append('\n')
+            elif text[i] in ' \t':
+                result.append(' ')
+            else:
+                result.append(text[i])
+        i += 1
+    return ''.join(result)
+def _parse_children(content: str) -> list[SgfTree]:
+    children = []
+    i = 0
+    while i < len(content):
+        if content[i] != '(':
+            raise ValueError("tree missing")
+        # Find matching parenthesis
+        paren_count = 0
+        start = i
+        while i < len(content):
+            if content[i] == '(':
+                paren_count += 1
+            elif content[i] == ')':
+                paren_count -= 1
+                if paren_count == 0:
+                    i += 1  # Include the closing parenthesis
+                    break
+            i += 1
+        if paren_count != 0:
+            raise ValueError("tree missing")
+        # Parse the child tree
+        child_content = content[start:i]
+        if not child_content.startswith('(') or not child_content.endswith(')'):
+            raise ValueError("tree missing")
+        # Remove parentheses and parse
+        inner_content = child_content[1:-1]
+        if not inner_content:
+            raise ValueError("tree with no nodes")
+        child_tree = _parse_tree(inner_content)
+        children.append(child_tree)
+    return children
+# Handled Edge Cases: empty input, missing parentheses, no nodes in tree, properties without delimiters, non-uppercase properties, missing tree structure, escape sequences in text values, multiple children parsing

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