Finished

Test Name	Status
test_opening_bracket_within_property_value_doesn_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_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
+    if not input_string:
+        raise ValueError("tree missing")
+    if not input_string.startswith('(') or not input_string.endswith(')'):
+        raise ValueError("tree missing")
+    # Edge Case: Empty tree with just parentheses
+    if input_string == '()':
+        raise ValueError("tree with no nodes")
+    # 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.startswith(';'):
+        raise ValueError("tree missing")
+    # Find the first node and any subsequent children
+    nodes = _split_nodes(content)
+    if not nodes:
+        raise ValueError("tree with no nodes")
+    # Parse the first node (root)
+    root_properties = _parse_properties(nodes[0])
+    children = []
+    # Parse any children
+    for node in nodes[1:]:
+        if node.startswith('('):
+            # This is a subtree
+            children.append(_parse_tree(node[1:-1]))
+        else:
+            # This is a single node
+            child_properties = _parse_properties(node)
+            children.append(SgfTree(properties=child_properties))
+    return SgfTree(properties=root_properties, children=children)
+def _split_nodes(content: str) -> list:
+    nodes = []
+    i = 0
+    content_len = len(content)
+    while i < content_len:
+        if content[i] == ';':
+            # Start of a node
+            start = i
+            i += 1
+            # Read until we hit another ; or ( or end of string
+            while i < content_len and content[i] not in ';(':
+                if content[i] == '[':
+                    # Skip over property values
+                    i += 1
+                    bracket_count = 1
+                    while i < content_len and bracket_count > 0:
+                        if content[i] == '\\':
+                            i += 2  # Skip escaped character
+                        elif content[i] == '[':
+                            bracket_count += 1
+                            i += 1
+                        elif content[i] == ']':
+                            bracket_count -= 1
+                            i += 1
+                        else:
+                            i += 1
+                else:
+                    i += 1
+            nodes.append(content[start:i])
+        elif content[i] == '(':
+            # Start of a subtree
+            start = i
+            i += 1
+            paren_count = 1
+            while i < content_len and paren_count > 0:
+                if content[i] == '(':
+                    paren_count += 1
+                elif content[i] == ')':
+                    paren_count -= 1
+                i += 1
+            nodes.append(content[start:i])
+        else:
+            i += 1
+    # Edge Case: No nodes found
+    if not nodes:
+        raise ValueError("tree with no nodes")
+    return nodes
+def _parse_properties(node_content: str) -> dict:
+    if not node_content.startswith(';'):
+        raise ValueError("tree missing")
+    properties = {}
+    content = node_content[1:]  # Remove the leading semicolon
+    i = 0
+    content_len = len(content)
+    while i < content_len:
+        # Skip whitespace
+        if content[i].isspace():
+            i += 1
+            continue
+        # Parse property key
+        key_start = i
+        while i < content_len and content[i].isalpha():
+            i += 1
+        # Edge Case: Missing key
+        if i == key_start:
+            raise ValueError("properties without delimiter")
+        key = content[key_start:i]
+        # Edge Case: Key not in uppercase
+        if key != key.upper() or not key.isalpha():
+            raise ValueError("property must be in uppercase")
+        # Parse property values
+        values = []
+        while i < content_len and content[i] == '[':
+            i += 1  # Skip opening bracket
+            value_start = i
+            bracket_count = 1
+            value_chars = []
+            while i < content_len and bracket_count > 0:
+                if content[i] == '\\':
+                    # Handle escape character - preserve backslash and next character
+                    # Both will be processed by _process_text_value according to SGF rules
+                    value_chars.append(content[i])  # Add backslash
+                    i += 1
+                    if i < content_len:
+                        value_chars.append(content[i])  # Add next character
+                        i += 1
+                    else:
+                        # Edge Case: Escape at end of string
+                        raise ValueError("properties without delimiter")
+                elif content[i] == ']':
+                    bracket_count -= 1
+                    if bracket_count > 0:
+                        value_chars.append(content[i])
+                    i += 1
+                elif content[i] == '[' and bracket_count == 1:
+                    bracket_count -= 1  # This is the closing bracket for this value
+                else:
+                    value_chars.append(content[i])
+                    i += 1
+            # Edge Case: Unclosed bracket
+            if bracket_count > 0:
+                raise ValueError("properties without delimiter")
+            value = ''.join(value_chars)
+            # Process according to SGF text type rules
+            processed_value = _process_text_value(value)
+            values.append(processed_value)
+        # Edge Case: No values for property
+        if not values:
+            raise ValueError("properties without delimiter")
+        properties[key] = values
+    return properties
+def _process_text_value(value: str) -> str:
+    result = []
+    i = 0
+    value_len = len(value)
+    while i < value_len:
+        if value[i] == '\\':
+            # Edge Case: Backslash at end of value
+            if i + 1 >= value_len:
+                result.append('\\')
+                break
+            next_char = value[i+1]
+            # Handle newline removal after backslash
+            if next_char == '\n':
+                i += 2  # Skip backslash and newline
+                continue
+            # For other characters after backslash, apply whitespace conversion rules
+            if next_char != '\n' and next_char.isspace():
+                # Whitespace other than newline is converted to space
+                result.append(' ')
+            else:
+                # Non-whitespace characters inserted as-is
+                result.append(next_char)
+            i += 2
+        elif value[i] != '\n' and value[i].isspace():
+            # All whitespace other than newline converted to space
+            result.append(' ')
+            i += 1
+        else:
+            result.append(value[i])
+            i += 1
+    return ''.join(result)
+# Handled Edge Cases: Empty input string, Missing delimiters (brackets, semicolons, parentheses), Property keys not in uppercase, Malformed escape sequences in property values, Tree structure without any nodes, Invalid nesting of nodes or variations, Multiple values for a single property, Newline handling in text values with backslashes