Finished

Test Name	Status
test_escaped_tab_in_property_value_is_converted_to_space	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_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_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
test_within_property_values_whitespace_characters_such_as_tab_are_converted_to_spaces	Pass

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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 the 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)
+            child_tree, consumed = _parse_subtree(content[index:])
+            children.append(child_tree)
+            index += consumed
+        elif content[index] == ';':  # Start of a sequential child node
+            child_tree, consumed = _parse_sequential_node(content[index:])
+            children.append(child_tree)
+            index += consumed
+        else:
+            # This should not happen in a valid SGF
+            break
+    return SgfTree(properties=properties, children=children)
+def _parse_subtree(content: str) -> tuple[SgfTree, int]:
+    """
+    Parse a subtree (including the outer parentheses).
+    Args:
+        content: The content starting with '('
+    Returns:
+        tuple: (parsed tree, number of characters consumed)
+    """
+    # Find matching closing parenthesis
+    balance = 0
+    end_index = 0
+    for i, char in enumerate(content):
+        if char == '(':
+        # Edge Case: Properly handle nested parentheses
+            balance += 1
+        elif char == ')':
+            balance -= 1
+            if balance == 0:
+                end_index = i
+                break
+    # Edge Case: Unmatched parentheses
+    if balance != 0:
+        raise ValueError("tree missing")
+    # Parse the content inside the parentheses
+    inner_content = content[1:end_index]
+    # Edge Case: Empty subtree
+    if not inner_content:
+        raise ValueError("tree with no nodes")
+    # Edge Case: Missing semicolon
+    if not inner_content.startswith(';'):
+        raise ValueError("tree missing")
+    tree = _parse_tree(inner_content)
+    return tree, end_index + 1
+def _parse_sequential_node(content: str) -> tuple[SgfTree, int]:
+    """
+    Parse a sequential node (starting with semicolon, not in parentheses).
+    Args:
+        content: The content starting with ';'
+    Returns:
+        tuple: (parsed tree, number of characters consumed)
+    """
+    # Parse properties of this node
+    properties, index = _parse_properties(content, 1)  # Start after the semicolon
+    # Parse children of this node
+    children = []
+    while index < len(content):
+        if content[index] == '(':  # Start of a child tree (variation)
+            child_tree, consumed = _parse_subtree(content[index:])
+            children.append(child_tree)
+            index += consumed
+        elif content[index] == ';':  # Start of a sequential child node
+            child_tree, consumed = _parse_sequential_node(content[index:])
+            children.append(child_tree)
+            index += consumed
+        else:
+            # End of this node
+            break
+    tree = SgfTree(properties=properties, children=children)
+    return tree, index
+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: (properties dictionary, next index to parse)
+    """
+    properties = {}
+    index = start_index
+    while index < len(content) and content[index] not in '();':
+        # Parse key
+        key_start = index
+        while index < len(content) and content[index].isalpha():
+            index += 1
+        # Edge Case: Empty key (no alphabetic characters found)
+        if key_start == index:
+            break
+        # Edge Case: Property key must be uppercase
+        if not content[key_start:index].isupper():
+            raise ValueError("property must be in uppercase")
+        key = content[key_start:index]
+        # Edge Case: Property without values
+        if index >= len(content) or content[index] != '[':
+            raise ValueError("properties without delimiter")
+        # Parse values
+        values = []
+        while index < len(content) and content[index] == '[':
+            index += 1  # Skip opening bracket
+            value_start = index
+            # Parse value, handling escapes
+            value_chars = []
+            while index < len(content):
+                if content[index] == '\\':
+                    # Add the backslash to the value
+                    value_chars.append('\\')
+                    index += 1
+                    if index < len(content):
+                        # Add the escaped character to the value
+                        value_chars.append(content[index])
+                        index += 1
+                elif content[index] == ']':
+                    break
+                else:
+                    value_chars.append(content[index])
+                    index += 1
+            # Set the value and update the index
+            value = ''.join(value_chars)
+            value = _unescape_value(value)
+            values.append(value)
+            index += 1  # Skip closing bracket
+        # Edge Case: Property with no values
+        if not values:
+            raise ValueError("properties without delimiter")
+        properties[key] = values
+    return properties, index
+def _unescape_value(value: str) -> str:
+    """
+    Unescape an SGF value according to SGF text type rules.
+    Args:
+        value: The escaped value
+    Returns:
+        str: The unescaped value
+    """
+    result = []
+    i = 0
+    while i < len(value):
+        if value[i] == '\\':
+            i += 1
+            if i < len(value):
+                # Check if next character is newline
+                if value[i] == '\n':
+                    # Edge Case: Backslash followed by newline removes the newline
+                    pass  # Don't add anything
+                else:
+                    # Edge Case: Backslash followed by any other character adds that character
+                    result.append(value[i])
+                i += 1
+            else:
+                # Edge Case: Trailing backslash
+                result.append('\\')
+        else:
+            char = value[i]
+            # Edge Case: Convert all whitespace (except newline) to space
+            if char != '\n' and char.isspace():
+                result.append(' ')
+            else:
+                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, properly handle nested parentheses, unmatched parentheses, empty subtree, missing semicolon, property key must be uppercase, property without values, unmatched bracket, property with no values, backslash followed by newline removes the newline, backslash followed by any other character adds that character, trailing backslash, convert all whitespace (except newline) to space
+# Handled Edge Cases: Property key must be uppercase, property without values, unmatched bracket, property with no values
+# Handled Edge Cases: Backslash followed by newline removes the newline, backslash followed by any other character adds that character, trailing backslash, convert all whitespace (except newline) to space