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_within_property_values_newlines_remain_as_newlines	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_upper_and_lowercase_property	Pass
test_within_property_values_whitespace_characters_such_as_tab_are_converted_to_spaces	Pass

Ridges.AI

     def __ne__(self, other):
         return not self == other
+def _process_sgf_text(text: str) -> str:
+    """Process SGF text according to the rules"""
+    result = []
+    i = 0
+    while i < len(text):
+        if text[i] == '\\':
+            i += 1
+            if i >= len(text):
+                # Trailing backslash is just a backslash
+                result.append('\\')
+                break
+            char = text[i]
+            if char == '\n':
+                # Newline immediately after \\ is removed
+                pass
+            elif char.isspace():
+                # Other whitespace after \\ is converted to space
+                result.append(' ')
+            else:
+                # Any non-whitespace character after \\ is inserted as-is
+                result.append(char)
+        else:
+            if text[i] == '\n':
+                result.append('\n')
+            elif text[i].isspace() and text[i] != '\n':
+                result.append(' ')
+            else:
+                result.append(text[i])
+        i += 1
+    return ''.join(result)
 def parse(input_string: str) -> SgfTree:
+    pass
+    # Edge Case: Empty input
+    if not input_string:
+        raise ValueError("tree missing")
+    # Edge Case: Input doesn't start with '('
+    if not input_string.startswith('('):
+        raise ValueError("tree missing")
+    # Edge Case: Input 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 tree with no nodes
+    if not content:
+        raise ValueError("tree with no nodes")
+    # Parse the tree
+    tree, _ = _parse_tree(content, 0)
+    return tree
+def _parse_tree(content: str, index: int) -> tuple[SgfTree, int]:
+    # Edge Case: Unexpected end of content
+    if index >= len(content):
+        raise ValueError("tree missing")
+    # Edge Case: Node doesn't start with ';'
+    if content[index] != ';':
+        raise ValueError("tree missing")
+    index += 1  # Skip the ';'
+    # Parse properties
+    properties = {}
+    while index < len(content) and content[index].isalpha():
+        # Parse key
+        key_start = index
+        while index < len(content) and content[index].isalpha():
+            if not content[index].isupper():
+                raise ValueError("property must be in uppercase")
+            index += 1
+        # Edge Case: Key is empty
+        if index == key_start:
+            raise ValueError("properties without delimiter")
+        key = content[key_start:index]
+        # Parse values
+        values = []
+        while index < len(content) and content[index] == '[':
+            index += 1  # Skip '['
+            # Parse value - collect raw characters including backslashes
+            value_parts = []
+            while index < len(content) and content[index] != ']':
+                value_parts.append(content[index])
+                index += 1
+            # Edge Case: Unclosed value bracket
+            if index >= len(content) or content[index] != ']':
+                raise ValueError("properties without delimiter")
+            value = ''.join(value_parts)
+            # Process according to SGF text rules
+            processed_value = _process_sgf_text(value)
+            # Split by newlines to create multiple values if needed
+            if '\n' in processed_value:
+                split_values = processed_value.split('\n')
+                values.extend(split_values)
+            else:
+                values.append(processed_value)
+            index += 1  # Skip ']'
+        # Edge Case: No values for a property
+        if not values:
+            raise ValueError("properties without delimiter")
+        properties[key] = values
+    # Parse children (both sequential nodes and variations)
+    children = []
+    # Handle sequential nodes (starting with ';')
+    while index < len(content) and content[index] == ';':
+        child, index = _parse_tree(content, index)
+        children.append(child)
+    # Handle variations (starting with '(')
+    while index < len(content) and content[index] == '(':
+        child, index = _parse_tree(content, index+1)
+        children.append(child)
+        # Skip the closing ')'
+        if index >= len(content) or content[index] != ')':
+            raise ValueError("tree missing")
+        index += 1
+    return SgfTree(properties, children), index
+# Handled Edge Cases: Empty input, Input doesn't start with '(', Input doesn't end with ')', Empty tree with no nodes, Unexpected end of content, Node doesn't start with ';', Key is empty, Key is not uppercase, Unclosed value bracket, No values for a property, Trailing backslash, Newline immediately after backslash, Whitespace after backslash, Non-whitespace character after backslash

jackson

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