apple

Finished

Test Name	Status
test_escaped_closing_bracket_within_property_value_becomes_just_a_closing_bracket	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	Skip
test_escaped_t_and_n_in_property_value_are_just_letters_not_whitespace	Skip
test_escaped_tab_in_property_value_is_converted_to_space	Skip
test_mixing_various_kinds_of_whitespace_and_escaped_characters_in_property_value	Skip
test_multiple_properties	Skip
test_multiple_property_values	Skip
test_node_without_properties	Skip
test_node_without_tree	Skip
test_opening_bracket_within_property_value_doesn_t_need_to_be_escaped	Skip
test_parentheses_in_property_value_don_t_need_to_be_escaped	Skip
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 the outer parentheses
+    content = input_string[1:-1]
+    if not content:
+        raise ValueError("tree with no nodes")
+    # Edge Case: Empty tree with just parentheses
+    if not content.strip():
+        raise ValueError("tree with no nodes")
+    return _parse_tree(content)
+def _parse_tree(content: str) -> SgfTree:
+    # Find the first node
+    if not content.startswith(';'):
+        # Check if it's a subtree
+        if content.startswith('('):
+            # This means we have a tree with children but no properties in the root
+            children = _parse_children(content)
+            return SgfTree(children=children)
+        else:
+            raise ValueError("tree missing")
+    # Parse the first node
+    node_end = _find_node_end(content)
+    node_content = content[1:node_end]  # Skip the ';'
+    properties = _parse_properties(node_content)
+    # Parse children if any
+    children_content = content[node_end:]
+    children = _parse_children(children_content) if children_content else []
+    return SgfTree(properties=properties, children=children)
+def _find_node_end(content: str) -> int:
+    # Find where the current node ends (before children)
+    i = 1  # Start after the ';'
+    while i < len(content):
+        if content[i] == '(':
+            # This might be the start of a child
+            return i
+        elif content[i] == ';':
+            # This is the start of the next node in the same level
+            return i
+        i += 1
+    return i
+def _parse_properties(content: str) -> dict:
+    properties = {}
+    i = 0
+    while i < len(content):
+        # Skip whitespace
+        if content[i].isspace():
+            i += 1
+            continue
+        # 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
+        key = content[key_start:i]
+        # Edge Case: Key with no values
+        if i >= len(content) or content[i] != '[':
+            raise ValueError("properties without delimiter")
+        # Parse values
+        values = []
+        while i < len(content) and content[i] == '[':
+            i += 1  # Skip '['
+            value_start = i
+            # Find the matching ']'
+            while i < len(content) and content[i] != ']':
+                i += 1
+            if i >= len(content):
+                raise ValueError("properties without delimiter")
+            value = _parse_value(content[value_start:i])
+            values.append(value)
+            i += 1  # Skip ']'
+        properties[key] = values
+    # Handled Edge Cases: Invalid key format, missing delimiters
+    return properties
+def _parse_value(content: str) -> str:
+    result = []
+    i = 0
+    while i < len(content):
+        if content[i] == '\\':
+            # Edge Case: Escape character at end of string
+            if i + 1 >= len(content):
+                result.append('\\')
+                break
+            # Next character is escaped
+            next_char = content[i+1]
+            if next_char == '\n':
+                # Edge Case: Backslash followed by newline - remove the newline
+                i += 2
+            elif next_char.isspace():
+                # Edge Case: Backslash followed by whitespace - keep the whitespace
+                result.append(next_char)
+                i += 2
+            else:
+                # Edge Case: Backslash followed by non-whitespace - keep as is
+                result.append(next_char)
+                i += 2
+        elif content[i] == '\n':
+            # Edge Case: Newline not preceded by backslash - keep it
+            result.append(content[i])
+            i += 1
+        elif content[i].isspace() and content[i] != '\n':
+            # Edge Case: Other whitespace characters - convert to space
+            result.append(' ')
+            i += 1
+        else:
+            result.append(content[i])
+            i += 1
+    # Handled Edge Cases: Escape sequences, whitespace handling, newlines
+    return ''.join(result)
+def _parse_children(content: str) -> list:
+    children = []
+    i = 0
+    while i < len(content):
+        if content[i] == '(':
+            # Find matching parenthesis
+            paren_count = 1
+            start = i
+            i += 1
+            while i < len(content) and paren_count > 0:
+                if content[i] == '(':
+                    paren_count += 1
+                elif content[i] == ')':
+                    paren_count -= 1
+                i += 1
+            if paren_count != 0:
+                raise ValueError("tree missing")
+            # Parse the subtree
+            subtree_content = content[start:i]
+            children.append(parse(subtree_content))
+        elif content[i] == ';':
+            # This is a node in the same level - should be handled as a child
+            node_end = _find_node_end(content[i:])
+            node_content = content[i:i+node_end]
+            # Wrap in parentheses to make it a valid tree
+            subtree = parse(f"({node_content})")
+            children.append(subtree)
+            i += node_end
+        else:
+            i += 1
+    # Edge Case: Malformed children structure
+    return children

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