python

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	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")
+    return _parse_tree(content)
+def _parse_tree(content: str) -> SgfTree:
+    # Find the first semicolon to separate the root node from children
+    if not content.startswith(';'):
+        # Check if it's a node without semicolon (should not happen in valid SGF but let's be safe)
+        raise ValueError("tree with no nodes")
+    # Skip the first semicolon
+    content = content[1:]
+    # Parse the root node properties
+    properties, remaining = _parse_properties(content)
+    children = []
+    # Parse children
+    while remaining.startswith('('):
+        # Find matching closing parenthesis
+        balance = 1
+        i = 1
+        while i < len(remaining) and balance > 0:
+            if remaining[i] == '(':
+                balance += 1
+            elif remaining[i] == ')':
+                balance -= 1
+            i += 1
+        if balance != 0:
+            raise ValueError("tree missing")
+        # Extract child subtree
+        child_content = remaining[1:i-1]
+        children.append(_parse_tree(child_content))
+        # Move to the next potential child
+        remaining = remaining[i:]
+    return SgfTree(properties=properties, children=children)
+def _parse_properties(content: str) -> tuple[dict, str]:
+    properties = {}
+    i = 0
+    while i < len(content) and content[i] != '(' and content[i] != ')':
+        # Parse property key
+        if not content[i].isalpha() or not content[i].isupper():
+            if content[i] == ';':
+                # Next node, stop parsing properties
+                break
+            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: Property without 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 opening bracket
+            value_start = i
+            # Find closing bracket, handling escaped brackets
+            bracket_count = 1
+            while i < len(content) and bracket_count > 0:
+                if content[i] == '\\' and i + 1 < len(content):
+                    i += 2  # Skip escape character and the next character
+                elif content[i] == '[':
+                    bracket_count += 1
+                    i += 1
+                elif content[i] == ']':
+                    bracket_count -= 1
+                    i += 1
+                else:
+                    i += 1
+            # Edge Case: Unclosed bracket
+            if bracket_count != 0:
+                raise ValueError("properties without delimiter")
+            value = content[value_start:i-1]
+            values.append(_unescape_text(value))
+        properties[key] = values
+        # Skip any whitespace
+        while i < len(content) and content[i].isspace():
+            i += 1
+    return properties, content[i:]
+def _unescape_text(text: str) -> str:
+    result = []
+    i = 0
+    while i < len(text):
+        if text[i] == '\\':
+            # Edge Case: Escape at end of string
+            if i + 1 >= len(text):
+                result.append('\\')
+                break
+            next_char = text[i + 1]
+            # Handle newline removal after backslash
+            if next_char == '\n':
+                # Remove the backslash and newline
+                i += 2
+                continue
+            # Handle other escaped characters
+            if next_char.isspace():
+                # Convert whitespace to space, but respect the backslash removal rule for newlines
+                result.append(' ')
+                i += 2
+            else:
+                # Insert non-whitespace character as-is
+                result.append(next_char)
+                i += 2
+        else:
+            # Convert other whitespace to spaces
+            if text[i] != '\n' and text[i].isspace():
+                result.append(' ')
+            else:
+                result.append(text[i])
+            i += 1
+    return ''.join(result)
+# Handled Edge Cases: Empty input, missing parentheses, no nodes, property not uppercase, missing delimiters, unclosed brackets, escape at end of string

python

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