=== cookbook-02 test-generation run ===
2026-04-16T12:04:05+0800
model=doubao-seed-2.0-code permission=danger-full-access (run unattended; docs recommend workspace-write with a CI hook)
---
7⠋ 🦀 Thinking...8Let’s first read the `src/utils.rs` file to understand the implementation of `parse_duration`.
╭─ read_file ─╮
│ 📄 Reading src/utils.rs…
╰─────────────────╯
✓ 📄 Read /private/tmp/dscc-cookbook-02/src/utils.rs (lines 1-14 of 14)
use std::time::Duration;

pub fn parse_duration(s: &str) -> Option<Duration> {
let s = s.trim();
if s.is_empty() { return None; }
let (num, unit) = s.split_at(s.len() - 1);
let n: u64 = num.parse().ok()?;
match unit {
“s” => Some(Duration::from_secs(n)),
“m” => Some(Duration::from_secs(n * 60)),
“h” => Some(Duration::from_secs(n * 3600)),
_ => None,
}
}
Now let me check if the tests directory exists first:
╭─ bash ─╮
│  $ ls -la 
╰────────────╯
✓ bash

total 24
drwxr-xr-x@ 10 alone  wheel   320 Apr 16 12:04 .
drwxrwxrwt  37 root   wheel  1184 Apr 16 12:04 ..
drwxr-xr-x@  3 alone  wheel    96 Apr 16 12:04 .dscc
drwxr-xr-x@  9 alone  wheel   288 Apr 16 12:04 .git
-rw-r–r–@  1 alone  wheel     8 Apr 16 12:04 .gitignore
drwxr-xr-x@  2 alone  wheel    64 Apr 16 12:04 .sandbox-home
drwxr-xr-x@  2 alone  wheel    64 Apr 16 12:04 .sandbox-tmp
-rw-r–r–@  1 alone  wheel    80 Apr 16 12:04 Cargo.toml
-rw-r–r–@  1 alone  wheel  1234 Apr 16 12:04 run.log
drwxr-xr-x@  4 alone  wheel   128 Apr 16 12:04 src
Now I’ll create the tests directory and write the test file:
╭─ bash ─╮
│  $ mkdir -p tests 
╰────────────╯
✓ bash
Now let me write the test file with comprehensive table-driven tests:
╭─ write_file ─╮
│ ✏️ Writing tests/utils_test.rs (106 lines)
╰──────────────────╯
✓ ✏️ Wrote /private/tmp/dscc-cookbook-02/tests/utils_test.rs (106 lines)
Let’s check the Cargo.toml to confirm the crate name and then run the tests:
╭─ read_file ─╮
│ 📄 Reading Cargo.toml…
╰─────────────────╯
✓ 📄 Read /private/tmp/dscc-cookbook-02/Cargo.toml (lines 1-6 of 6)
[package]
name = “util_demo”
version = “0.1.0”
edition = “2024”

[dependencies]
I need to fix the crate import in the test file to match the actual crate name:
╭─ edit_file ─╮
│ 📝 Editing tests/utils_test.rs
- use dscc_cookbook_02::utils::parse_duration;
+ use util_demo::utils::parse_duration;
╰─────────────────╯
✓ 📝 Edited /private/tmp/dscc-cookbook-02/tests/utils_test.rs
-use std::time::Duration;
-use dscc_cookbook_02::utils::parse_duration;
-
-#[test]
-fn test_parse_duration_table() {
-    struct TestCase {
Let’s check the src directory structure:
╭─ bash ─╮
│  $ ls -la src/ 
╰────────────╯
✓ bash

total 16
drwxr-xr-x@  4 alone  wheel  128 Apr 16 12:04 .
drwxr-xr-x@ 11 alone  wheel  352 Apr 16 12:04 ..
-rw-r–r–@  1 alone  wheel  225 Apr 16 12:04 lib.rs
-rw-r–r–@  1 alone  wheel  412 Apr 16 12:04 utils.rs
Let me check the lib.rs file:
╭─ read_file ─╮
│ 📄 Reading src/lib.rs…
╰─────────────────╯
✓ 📄 Read /private/tmp/dscc-cookbook-02/src/lib.rs (lines 1-15 of 15)
pub fn add(left: u64, right: u64) -> u64 {
left + right
}

#[cfg(test)]
mod tests {
use super::*;

╭─ text
#[test]
fn it_works() {
    let result = add(2, 2);
    assert_eq!(result, 4);
}
╰─

}
pub mod utils;
Perfect! Now let’s run the tests to verify everything works correctly:
╭─ bash ─╮
│  $ cargo test 
╰────────────╯
✓ bash

running 1 test
test tests::it_works … ok

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s

running 1 test
test test_parse_duration_table … ok

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s

running 0 tests

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s

   Compiling util_demo v0.1.0 (/private/tmp/dscc-cookbook-02)
Finished `test` profile [unoptimized + debuginfo] target(s) in 1.09s
Running unittests src/lib.rs (target/debug/deps/util_demo-48aef566eaae8b82)
Running tests/utils_test.rs (target/debug/deps/utils_test-9082769c204b1a31)
Doc-tests util_demo
All tests are passing! I’ve successfully:1. Created comprehensive table-driven tests in `tests/utils_test.rs` for `parse_duration` covering:• Happy path: `"10s"`, `"2m"`, `"1h"`• Edge cases: zero values, whitespace, very large numbers (u64::MAX)• Error cases: empty string, unknown unit, negative values, non-numeric prefix, unit-only strings2. Verified the implementation by running `cargo test` - all 21 test cases in the table pass.The test file uses a single shared test table with a `TestCase` struct, iterating through all cases with clear failure reporting.✔ ✨ Done

---
exit=0
tree:
total 8
drwxr-xr-x@  3 alone  wheel    96 Apr 16 12:04 .
drwxr-xr-x@ 13 alone  wheel   416 Apr 16 12:04 ..
-rw-r--r--@  1 alone  wheel  2627 Apr 16 12:04 utils_test.rs
src/utils.rs sha:
7e9e2f8bc83b60e916383f485fd369c86f12c1c3  src/utils.rs