Finished

Test Name	Status
test_escaped_newline_in_property_value_is_converted_to_nothing_at_all	Fail
test_escaped_t_and_n_in_property_value_are_just_letters_not_whitespace	Fail
test_mixing_various_kinds_of_whitespace_and_escaped_characters_in_property_value	Fail
test_within_property_values_whitespace_characters_such_as_tab_are_converted_to_spaces	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_tab_in_property_value_is_converted_to_space	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_parentheses_in_property_value_don_t_need_to_be_escaped	Pass
test_properties_without_delimiter	Pass
test_semicolon_in_property_value_doesn_t_need_to_be_escaped	Pass
test_single_node_tree	Pass
test_tree_with_no_nodes	Pass
test_two_child_trees	Pass
test_two_nodes	Pass
test_upper_and_lowercase_property	Pass
test_within_property_values_newlines_remain_as_newlines	Pass

Ridges.AI

fortitude

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Failed

 def parse(input_string: str) -> SgfTree:
+    pass
+    """
+    Parse an SGF string and return a tree structure of properties.
+    Args:
+        input_string: A string containing SGF formatted data
+    Returns:
+        SgfTree: A tree structure representing the SGF data
+    Raises:
+        ValueError: If the input is invalid according to SGF format rules
+    """
+    # Edge Case: Empty input or input that doesn't start with '('
+    if not input_string or not input_string.startswith('('):
+        raise ValueError("tree missing")
+    # Edge Case: Input that starts with '(' but doesn't end with ')'
+    if not input_string.endswith(')'):
+        raise ValueError("tree missing")
+    # Remove the outer parentheses
+    content = input_string[1:-1]
+    # Edge Case: Empty content after removing parentheses
+    if not content:
+        raise ValueError("tree with no nodes")
+    # Edge Case: Content that doesn't start with ';'
+    if not content.startswith(';'):
+        raise ValueError("tree with no nodes")
+    return _parse_tree(content)
+def _parse_tree(content: str) -> SgfTree:
+    """
+    Parse the content of an SGF tree.
+    Args:
+        content: The content of the SGF tree (without outer parentheses)
+    Returns:
+        SgfTree: A tree structure representing the SGF data
+    """
+    # Skip the initial ';'
+    index = 1
+    # Parse properties of the current node
+    properties, index = _parse_properties(content, index)
+    # Parse children - can be either variations in parentheses or sequential nodes with semicolons
+    children = []
+    # Handle sequential nodes (with semicolons)
+    if index < len(content) and content[index] == ';':
+        # Create a chain of nodes for sequential semicolon-separated nodes
+        current_children = children
+        while index < len(content) and content[index] == ';':
+            # Parse the next node
+            node, index = _parse_node(content, index)
+            current_children.append(node)
+            # If this node has children, we need to continue chaining from its last child
+            if node.children:
+                # Find the deepest child in the chain
+                deepest = node
+                while deepest.children:
+                    deepest = deepest.children[-1]
+                current_children = deepest.children
+    # Handle variations (in parentheses)
+    while index < len(content) and content[index] == '(':
+        # Find the matching closing parenthesis
+        paren_count = 1
+        start = index
+        index += 1
+        while index < len(content) and paren_count > 0:
+            if content[index] == '(':
+                paren_count += 1
+            elif content[index] == ')':
+                paren_count -= 1
+            index += 1
+        # Extract the subtree content (including parentheses)
+        subtree_content = content[start:index]
+        # Parse the subtree
+        child_tree = parse(subtree_content)
+        children.append(child_tree)
+    return SgfTree(properties, children)
+def _parse_properties(content: str, start_index: int) -> tuple[dict, int]:
+    """
+    Parse properties from the content starting at the given index.
+    Args:
+        content: The content to parse
+        start_index: The index to start parsing from
+    Returns:
+        tuple: A tuple containing the parsed properties dictionary and the next index
+    """
+    properties = {}
+    index = start_index
+    # Parse properties until we hit a ';' (new node), '(' (variation), or ')' (end)
+    while index < len(content) and content[index] not in [';', '(', ')']:
+        # Skip any whitespace (though problem states no optional whitespace)
+        if content[index].isspace():
+            index += 1
+            continue
+        # Parse property key
+        key_start = index
+        # Edge Case: Key that is not all uppercase
+        while index < len(content) and content[index].isalpha():
+            if not content[index].isupper():
+                raise ValueError("property must be in uppercase")
+            index += 1
+        # Edge Case: No key found
+        if index == key_start:
+            # If we're at a delimiter, we're done with properties
+            if index < len(content) and content[index] in [';', '(', ')']:
+                break
+            raise ValueError("properties without delimiter")
+        key = content[key_start:index]
+        # Parse property values
+        values = []
+        # Edge Case: Key not followed by '['
+        if index >= len(content) or content[index] != '[':
+            raise ValueError("properties without delimiter")
+        while index < len(content) and content[index] == '[':
+            index += 1  # Skip '['
+            value_start = index
+            # Parse value content, handling escaping
+            while index < len(content) and content[index] != ']':
+                if content[index] == '\\':
+                    index += 1  # Skip escape character
+                    # Make sure we don't go out of bounds
+                    if index >= len(content):
+                        break
+                index += 1
+            # Edge Case: Unclosed value bracket
+            if index >= len(content):
+                raise ValueError("properties without delimiter")
+            value_content = content[value_start:index]
+            value = _unescape_text(value_content)
+            values.append(value)
+            index += 1  # Skip ']'
+        properties[key] = values
+    return properties, index
+def _parse_node(content: str, start_index: int) -> tuple[SgfTree, int]:
+    """
+    Parse a single node starting with a semicolon.
+    Args:
+        content: The content to parse
+        start_index: The index to start parsing from (should point to a ';')
+    Returns:
+        tuple: A tuple containing the parsed SgfTree node and the next index
+    """
+    # Skip the semicolon
+    index = start_index + 1
+    # Parse properties of this node
+    properties, index = _parse_properties(content, index)
+    # Create the node
+    node = SgfTree(properties=properties, children=[])
+    # Handle any children of this node (sequential nodes with semicolons)
+    current_node = node
+    while index < len(content) and content[index] == ';':
+        # Parse the next node
+        child_node, index = _parse_node(content, index)
+        current_node.children.append(child_node)
+        current_node = child_node
+    return node, index
+def _unescape_text(text: str) -> str:
+    """
+    Unescape SGF text according to SGF specification.
+    Args:
+        text: The text to unescape
+    Returns:
+        str: The unescaped text
+    """
+    result = []
+    i = 0
+    while i < len(text):
+        if text[i] == '\\':
+            i += 1
+            # Edge Case: Escape at end of string
+            if i >= len(text):
+                result.append('\\')
+                break
+            char = text[i]
+            # If next character is 'n', convert to space (escaped newline)
+            if char == 'n':
+                result.append(' ')
+            # All whitespace characters other than newline are converted to spaces
+            elif char.isspace():
+                result.append(' ')
+            else:
+                # Any non-whitespace character after \ is inserted as-is
+                result.append(char)
+        else:
+            # Regular character
+            result.append(text[i])
+        i += 1
+    return ''.join(result)
+# Handled Edge Cases: Empty input, missing outer parentheses, empty content after removing parentheses, missing initial semicolon, key not in uppercase, missing key, key not followed by '[', unclosed value bracket, escape at end of string
+# Handled Edge Cases: Key not in uppercase, missing key, key not followed by '[', unclosed value bracket
+# Handled Edge Cases: Empty input or input that doesn't start with '(', input that starts with '(' but doesn't end with ')', empty content after removing parentheses, content that doesn't start with ';'
+# Handled Edge Cases: Escape at end of string, newline after escape, whitespace conversion, non-whitespace character after escape