Finished

Test Name	Status
test_escaped_closing_bracket_within_property_value_becomes_just_a_closing_bracket	Fail
test_mixing_various_kinds_of_whitespace_and_escaped_characters_in_property_value	Fail
test_opening_bracket_within_property_value_doesn_t_need_to_be_escaped	Fail
test_upper_and_lowercase_property	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	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_multiple_properties	Pass
test_multiple_property_values	Pass
test_node_without_properties	Pass
test_node_without_tree	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_within_property_values_newlines_remain_as_newlines	Pass
test_within_property_values_whitespace_characters_such_as_tab_are_converted_to_spaces	Pass

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seahawk

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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 in SGF format
+    Returns:
+        SgfTree: The parsed SGF tree
+    Raises:
+        ValueError: If the input is invalid according to SGF format rules
+    """
+    # Edge Case: Empty input
+    if not input_string:
+        raise ValueError("tree missing")
+    # Edge Case: Missing opening parenthesis
+    if not input_string.startswith('('):
+        raise ValueError("tree missing")
+    # Edge Case: Missing closing parenthesis
+    if not input_string.endswith(')'):
+        raise ValueError("tree missing")
+    # Remove the outer parentheses
+    content = input_string[1:-1]
+    # Edge Case: Empty tree with no nodes
+    if not content:
+        raise ValueError("tree with no nodes")
+    # Edge Case: Missing semicolon after opening parenthesis
+    if not content.startswith(';'):
+        raise ValueError("tree missing")
+    return _parse_tree(content)
+def _parse_tree(content: str) -> SgfTree:
+    """
+    Parse the content of a tree (without outer parentheses).
+    Args:
+        content: The content of the tree
+    Returns:
+        SgfTree: The parsed tree
+    """
+    # Skip the initial semicolon
+    index = 1
+    # Parse properties of the current node
+    properties, index = _parse_properties(content, index)
+    # Parse children
+    children = []
+    while index < len(content):
+        if content[index] == '(':  # Start of a child tree (variation)
+            # 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
+            # Edge Case: Malformed parentheses
+            if paren_count != 0:
+                raise ValueError("tree missing")
+            # Parse the child tree
+            child_content = content[start:index]
+            children.append(parse(child_content))
+        elif content[index] == ';':  # Start of a sequential child node
+            # Parse the sequential node and its children
+            child_node, index = _parse_sequential_node_from_position(content, index)
+            children.append(child_node)
+        else:
+            # Edge Case: Unexpected character
+            raise ValueError("tree missing")
+    return SgfTree(properties=properties, children=children)
+def _parse_properties(content: str, start_index: int) -> tuple[dict, int]:
+    """
+    Parse properties from the content starting at start_index.
+    Args:
+        content: The content to parse
+        start_index: The index to start parsing from
+    Returns:
+        tuple: A tuple of (properties_dict, next_index)
+    """
+    properties = {}
+    index = start_index
+    while index < len(content) and content[index] not in ['(', ')', ';']:
+        # Expecting a property in format Key[Value]
+        # Parse the key
+        key_start = index
+        # Edge Case: Key must be uppercase
+        if not content[index].isalpha() or not content[index].isupper():
+            raise ValueError("property must be in uppercase")
+        while index < len(content) and content[index].isalpha() and content[index].isupper():
+            index += 1
+        # Edge Case: Empty key
+        if index == key_start:
+            raise ValueError("properties without delimiter")
+        key = content[key_start:index]
+        # Edge Case: Missing opening bracket for value
+        if index >= len(content) or content[index] != '[':
+            raise ValueError("properties without delimiter")
+        # Parse all values for this key
+        values = []
+        while index < len(content) and content[index] == '[':
+            index += 1  # Skip the opening bracket
+            value_start = index
+            # Parse the value until closing bracket
+            while index < len(content) and content[index] != ']':
+                index += 1
+            # Edge Case: Missing closing bracket
+            if index >= len(content) or content[index] != ']':
+                raise ValueError("properties without delimiter")
+            value = content[value_start:index]
+            # Process the value according to SGF text type rules
+            value = _process_text_value(value)
+            values.append(value)
+            index += 1  # Skip the closing bracket
+        # Add the property
+        properties[key] = values
+    return properties, index
+def _parse_sequential_node_from_position(content: str, start_index: int) -> tuple[SgfTree, int]:
+    """
+    Parse a sequential node starting from a specific position.
+    Args:
+        content: The content to parse
+        start_index: The index where the semicolon is located
+    Returns:
+        tuple: (SgfTree node, new index position)
+    """
+    # Edge Case: Must start with semicolon
+    if content[start_index] != ';':
+        raise ValueError("tree missing")
+    # Skip the initial semicolon
+    index = start_index + 1
+    # Parse properties of the current node
+    properties, index = _parse_properties(content, index)
+    # Parse children (if any)
+    children = []
+    while index < len(content) and content[index] not in [')', '(']:
+        if content[index] == ';':  # Start of a sequential child node
+            # Parse the next sequential node
+            child_node, index = _parse_sequential_node_from_position(content, index)
+            children.append(child_node)
+        else:
+            # Edge Case: Unexpected character
+            raise ValueError("tree missing")
+    # Handle variations (parenthesized children)
+    while index < len(content) and content[index] == '(':  # Start of a child tree (variation)
+        # 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
+        # Edge Case: Malformed parentheses
+        if paren_count != 0:
+            raise ValueError("tree missing")
+        # Parse the child tree
+        child_content = content[start:index]
+        children.append(parse(child_content))
+    return SgfTree(properties=properties, children=children), index
+def _process_text_value(value: str) -> str:
+    """
+    Process a text value according to SGF text type rules.
+    Args:
+        value: The raw value string
+    Returns:
+        str: The processed value
+    """
+    result = []
+    i = 0
+    while i < len(value):
+        if value[i] == '\\':
+            # Handle escape character
+            i += 1
+            if i < len(value):
+                if value[i] == '\n':
+                    # Newline immediately after \ is removed
+                    pass  # Just skip both the \ and the \n
+                else:
+                    # Any other character after \ is inserted as-is
+                    # This includes whitespace characters which follow their normal rules
+                    if value[i] in ' \t\r':
+                        # All whitespace other than newline converted to space
+                        result.append(' ')
+                    else:
+                        # Non-whitespace character inserted as-is
+                        result.append(value[i])
+            else:
+                # Backslash at end of string
+                result.append('\\')
+        else:
+            # Handle regular characters
+            char = value[i]
+            if char == '\n':
+                # Newlines remain as newlines
+                result.append(char)
+            elif char in ' \t\r':
+                # All whitespace other than newline converted to space
+                result.append(' ')
+            else:
+                # All other characters inserted as-is
+                result.append(char)
+        i += 1
+    return ''.join(result)
+# Handled Edge Cases: Empty input, missing opening parenthesis, missing closing parenthesis, empty tree with no nodes, missing semicolon after opening parenthesis, malformed parentheses, unexpected character, key must be uppercase, empty key, missing opening bracket for value, missing closing bracket, escape at end of string