depyler-core 3.24.0

// Generated by: DEPYLER stdlib validation Phase 1
// Module: csv - Python CSV module validation
// Status: RED phase - Tests written first, implementation pending

use depyler_core::transpile_python_to_rust;

// DEPYLER-STDLIB-CSV-001: CSV Reader functions
#[test]
fn test_csv_reader() {
    let python = r#"
import csv

def read_csv_file(filename: str) -> list:
    with open(filename, 'r') as f:
        reader = csv.reader(f)
        return list(reader)
"#;

    let result = transpile_python_to_rust(python).expect("Transpilation failed");

    // Should generate csv::Reader
    assert!(result.contains("csv::Reader") || result.contains("reader"));
}

#[test]
#[ignore = "DEPYLER-STDLIB-CSV: Not implemented yet - RED phase"]
fn test_csv_reader_with_delimiter() {
    let python = r#"
import csv

def read_csv_with_delimiter(filename: str, delim: str) -> list:
    with open(filename, 'r') as f:
        reader = csv.reader(f, delimiter=delim)
        return list(reader)
"#;

    let result = transpile_python_to_rust(python).expect("Transpilation failed");

    // Should generate csv::ReaderBuilder with delimiter
    assert!(result.contains("delimiter") || result.contains("ReaderBuilder"));
}

// DEPYLER-STDLIB-CSV-002: CSV Writer functions
#[test]
fn test_csv_writer() {
    let python = r#"
import csv

def write_csv_file(filename: str, rows: list) -> None:
    with open(filename, 'w') as f:
        writer = csv.writer(f)
        writer.writerows(rows)
"#;

    let result = transpile_python_to_rust(python).expect("Transpilation failed");

    // Should generate csv::Writer
    assert!(result.contains("csv::Writer") || result.contains("writer"));
}

#[test]
#[ignore = "DEPYLER-STDLIB-CSV: Not implemented yet - RED phase"]
fn test_csv_writer_writerow() {
    let python = r#"
import csv

def write_single_row(filename: str, row: list) -> None:
    with open(filename, 'w') as f:
        writer = csv.writer(f)
        writer.writerow(row)
"#;

    let result = transpile_python_to_rust(python).expect("Transpilation failed");

    // Should generate writerow method
    assert!(result.contains("write_record") || result.contains("serialize"));
}

#[test]
#[ignore = "DEPYLER-STDLIB-CSV: Not implemented yet - RED phase"]
fn test_csv_writer_writerows() {
    let python = r#"
import csv

def write_multiple_rows(filename: str, rows: list) -> None:
    with open(filename, 'w') as f:
        writer = csv.writer(f)
        writer.writerows(rows)
"#;

    let result = transpile_python_to_rust(python).expect("Transpilation failed");

    // Should generate writerows iteration
    assert!(result.contains("for") || result.contains("iter"));
}

// DEPYLER-STDLIB-CSV-003: DictReader functions
#[test]
#[ignore = "DEPYLER-STDLIB-CSV: Not implemented yet - RED phase"]
fn test_csv_dictreader() {
    let python = r#"
import csv

def read_csv_as_dict(filename: str) -> list:
    with open(filename, 'r') as f:
        reader = csv.DictReader(f)
        return list(reader)
"#;

    let result = transpile_python_to_rust(python).expect("Transpilation failed");

    // Should generate csv DictReader or deserialize
    assert!(result.contains("DictReader") || result.contains("deserialize"));
}

#[test]
#[ignore = "DEPYLER-STDLIB-CSV: Not implemented yet - RED phase"]
fn test_csv_dictreader_fieldnames() {
    let python = r#"
import csv

def read_with_fieldnames(filename: str, fields: list) -> list:
    with open(filename, 'r') as f:
        reader = csv.DictReader(f, fieldnames=fields)
        return list(reader)
"#;

    let result = transpile_python_to_rust(python).expect("Transpilation failed");

    // Should generate fieldnames handling
    assert!(result.contains("fieldnames") || result.contains("headers"));
}

// DEPYLER-STDLIB-CSV-004: DictWriter functions
#[test]
#[ignore = "DEPYLER-STDLIB-CSV: Not implemented yet - RED phase"]
fn test_csv_dictwriter() {
    let python = r#"
import csv

def write_csv_from_dict(filename: str, fieldnames: list, rows: list) -> None:
    with open(filename, 'w') as f:
        writer = csv.DictWriter(f, fieldnames=fieldnames)
        writer.writeheader()
        writer.writerows(rows)
"#;

    let result = transpile_python_to_rust(python).expect("Transpilation failed");

    // Should generate DictWriter
    assert!(result.contains("DictWriter") || result.contains("serialize"));
}

#[test]
#[ignore = "DEPYLER-STDLIB-CSV: Not implemented yet - RED phase"]
fn test_csv_dictwriter_writeheader() {
    let python = r#"
import csv

def write_header(filename: str, fieldnames: list) -> None:
    with open(filename, 'w') as f:
        writer = csv.DictWriter(f, fieldnames=fieldnames)
        writer.writeheader()
"#;

    let result = transpile_python_to_rust(python).expect("Transpilation failed");

    // Should generate writeheader method
    assert!(result.contains("write_record") || result.contains("header"));
}

// DEPYLER-STDLIB-CSV-005: CSV Dialect and formatting
#[test]
#[ignore = "DEPYLER-STDLIB-CSV: Not implemented yet - RED phase"]
fn test_csv_excel_dialect() {
    let python = r#"
import csv

def read_excel_csv(filename: str) -> list:
    with open(filename, 'r') as f:
        reader = csv.reader(f, dialect='excel')
        return list(reader)
"#;

    let result = transpile_python_to_rust(python).expect("Transpilation failed");

    // Should generate dialect handling
    assert!(result.contains("dialect") || result.contains("excel"));
}

#[test]
#[ignore = "DEPYLER-STDLIB-CSV: Not implemented yet - RED phase"]
fn test_csv_quote_behavior() {
    let python = r#"
import csv

def read_with_quoting(filename: str) -> list:
    with open(filename, 'r') as f:
        reader = csv.reader(f, quoting=csv.QUOTE_MINIMAL)
        return list(reader)
"#;

    let result = transpile_python_to_rust(python).expect("Transpilation failed");

    // Should generate quoting behavior
    assert!(result.contains("quote") || result.contains("QuoteStyle"));
}

#[test]
#[ignore = "DEPYLER-STDLIB-CSV: Not implemented yet - RED phase"]
fn test_csv_escapechar() {
    let python = r#"
import csv

def read_with_escape(filename: str) -> list:
    with open(filename, 'r') as f:
        reader = csv.reader(f, escapechar='\\')
        return list(reader)
"#;

    let result = transpile_python_to_rust(python).expect("Transpilation failed");

    // Should generate escapechar handling
    assert!(result.contains("escape") || result.contains("escape_char"));
}

// DEPYLER-STDLIB-CSV-006: Sniffer class
#[test]
#[ignore = "DEPYLER-STDLIB-CSV: Not implemented yet - RED phase"]
fn test_csv_sniffer_sniff() {
    let python = r#"
import csv

def detect_dialect(sample: str) -> object:
    sniffer = csv.Sniffer()
    return sniffer.sniff(sample)
"#;

    let result = transpile_python_to_rust(python).expect("Transpilation failed");

    // Should generate dialect detection
    assert!(result.contains("sniff") || result.contains("detect"));
}

#[test]
#[ignore = "DEPYLER-STDLIB-CSV: Not implemented yet - RED phase"]
fn test_csv_sniffer_has_header() {
    let python = r#"
import csv

def check_has_header(sample: str) -> bool:
    sniffer = csv.Sniffer()
    return sniffer.has_header(sample)
"#;

    let result = transpile_python_to_rust(python).expect("Transpilation failed");

    // Should generate header detection
    assert!(result.contains("has_header") || result.contains("header"));
}

// DEPYLER-STDLIB-CSV-007: Constants
#[test]
#[ignore = "DEPYLER-STDLIB-CSV: Not implemented yet - RED phase"]
fn test_csv_quote_constants() {
    let python = r#"
import csv

def get_quote_all() -> int:
    return csv.QUOTE_ALL
"#;

    let result = transpile_python_to_rust(python).expect("Transpilation failed");

    // Should generate quote constant
    assert!(result.contains("QUOTE_ALL") || result.contains("QuoteStyle"));
}

// DEPYLER-STDLIB-CSV-008: Advanced reader options
#[test]
#[ignore = "DEPYLER-STDLIB-CSV: Not implemented yet - RED phase"]
fn test_csv_reader_skip_lines() {
    let python = r#"
import csv

def read_skip_blank_lines(filename: str) -> list:
    with open(filename, 'r') as f:
        reader = csv.reader(f, skipinitialspace=True)
        return list(reader)
"#;

    let result = transpile_python_to_rust(python).expect("Transpilation failed");

    // Should generate skip initial space handling
    assert!(result.contains("trim") || result.contains("skip"));
}

#[test]
#[ignore = "DEPYLER-STDLIB-CSV: Not implemented yet - RED phase"]
fn test_csv_reader_line_num() {
    let python = r#"
import csv

def get_line_numbers(filename: str) -> list:
    with open(filename, 'r') as f:
        reader = csv.reader(f)
        return [reader.line_num for row in reader]
"#;

    let result = transpile_python_to_rust(python).expect("Transpilation failed");

    // Should generate line number tracking
    assert!(result.contains("line_num") || result.contains("position"));
}

// DEPYLER-STDLIB-CSV-009: Error handling
#[test]
#[ignore = "DEPYLER-STDLIB-CSV: Not implemented yet - RED phase"]
fn test_csv_error() {
    let python = r#"
import csv

def handle_csv_error(filename: str) -> None:
    try:
        with open(filename, 'r') as f:
            reader = csv.reader(f)
            list(reader)
    except csv.Error as e:
        print(f"CSV error: {e}")
"#;

    let result = transpile_python_to_rust(python).expect("Transpilation failed");

    // Should generate CSV error handling
    assert!(result.contains("csv::Error") || result.contains("CsvError"));
}

// Total: 20 comprehensive tests for csv module
// Coverage: reader, writer, DictReader, DictWriter
// Advanced: dialect, quoting, escaping, Sniffer
// Options: delimiter, fieldnames, skipinitialspace
// Error handling: csv.Error