If you look at the contract source, you will notice it has end-to-end tests at the end of the lib.rs
file.
┌ Pop CLI : Starting end-to-end tests
│
▲ ⚠️ The substrate-contracts-node binary is not found.
│
◇ 📦 Would you like to source it automatically now?
│ Yes
│
◇ ✅ substrate-contracts-node successfully sourced. Cached at: /Users/bruno/Library/Caches/pop/substrate-contracts-node-v0.41.0
│
Finished `test` profile [unoptimized + debuginfo] target(s) in 0.98s
Running unittests lib.rs (target/debug/deps/my_contract-3c35b5992ffebf0d)
running 5 tests
test flipper::e2e_tests::e2e_test_deployed_contract ... ignored
test flipper::tests::it_works ... ok
test flipper::tests::default_works ... ok
Compiling toml_datetime v0.6.5
Compiling toml_edit v0.20.2
....
Finished release [optimized] target(s) in 9.03s
Running `target/ink/release/metadata-gen`
test flipper::e2e_tests::default_works ... ok
test flipper::e2e_tests::it_works ... ok
test result: ok. 4 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out; finished in 47.56s
Doc-tests flipper
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
└ End-to-end testing complete