tofu

Finished

Test Name	Status
test_parentheses_in_property_value_don_t_need_to_be_escaped	Fail
test_all_lowercase_property	Pass
test_empty_input	Pass
test_escaped_backslash_in_property_value_becomes_just_a_backslash	Pass
test_escaped_closing_bracket_within_property_value_becomes_just_a_closing_bracket	Pass
test_escaped_newline_in_property_value_is_converted_to_nothing_at_all	Pass
test_escaped_t_and_n_in_property_value_are_just_letters_not_whitespace	Pass
test_escaped_tab_in_property_value_is_converted_to_space	Pass
test_mixing_various_kinds_of_whitespace_and_escaped_characters_in_property_value	Pass
test_multiple_properties	Pass
test_multiple_property_values	Pass
test_node_without_properties	Pass
test_node_without_tree	Pass
test_opening_bracket_within_property_value_doesn_t_need_to_be_escaped	Pass
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 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:
+    # Find the first semicolon which starts the node
+    if not content.startswith(';'):
+        raise ValueError("tree with no nodes")
+    # Parse the first node
+    node_content, remaining = _parse_node_content(content[1:])
+    properties = _parse_properties(node_content)
+    children = []
+    # Parse children
+    while remaining:
+        if remaining.startswith('('):
+            # Parse a subtree
+            subtree_content, remaining = _extract_subtree(remaining)
+            children.append(_parse_tree(subtree_content))
+        elif remaining.startswith(';'):
+            # Parse a sequential child node
+            child_node = _parse_tree(remaining)
+            children.append(child_node)
+            break
+        else:
+            raise ValueError("tree missing")
+    return SgfTree(properties=properties, children=children)
+def _parse_node_content(content: str) -> tuple[str, str]:
+    # Extract properties until we hit a '(' or ';' or end of string
+    i = 0
+    while i < len(content):
+        if content[i] == '(' or content[i] == ';':
+            break
+        i += 1
+    return content[:i], content[i:]
+def _extract_subtree(content: str) -> tuple[str, str]:
+    if not content.startswith('('):
+        raise ValueError("tree missing")
+    # Find matching parenthesis
+    level = 0
+    for i, char in enumerate(content):
+        if char == '(':
+            level += 1
+        elif char == ')':
+            level -= 1
+            if level == 0:
+                return content[1:i], content[i+1:]
+    raise ValueError("tree missing")
+def _parse_properties(content: str) -> dict:
+    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 if key already exists
+        if key in properties:
+            raise ValueError("properties without delimiter")
+        # Parse values
+        values = []
+        while i < len(content) and content[i] == '[':
+            value, i = _parse_value(content, i)
+            values.append(value)
+        if not values:
+            raise ValueError("properties without delimiter")
+        properties[key] = values
+    return properties
+def _parse_value(content: str, start: int) -> tuple[str, int]:
+    if content[start] != '[':
+        raise ValueError("properties without delimiter")
+    i = start + 1
+    value = []
+    while i < len(content) and content[i] != ']':
+        if content[i] == '\\':
+            # Handle escape character
+            i += 1
+            if i >= len(content):
+                raise ValueError("properties without delimiter")
+            # If next character is newline, skip both \ and newline
+            if content[i] == '\n':
+                i += 1
+            else:
+                # Any non-whitespace character after \ is inserted as-is
+                # Any whitespace character after \ is converted according to rules
+                char = content[i]
+                if char.isspace() and char != '\n':
+                    value.append(' ')
+                else:
+                    value.append(char)
+                i += 1
+        else:
+            # Regular character
+            char = content[i]
+            if char == '\n':
+                value.append(char)
+            elif char.isspace():
+                value.append(' ')
+            else:
+                value.append(char)
+            i += 1
+    if i >= len(content) or content[i] != ']':
+        raise ValueError("properties without delimiter")
+    return ''.join(value), i + 1

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