[LAB1] 311552005

[patty5531998]

Description

Update main_test.js and finish Lab1

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• A clear title (name your PR "[LAB{lab_number}] {your_student_id}")
• A meaningful message for PR, as well as its commits
• From your specific branch (not main or other's branch) merging to your branch
• Excluding any irrelevant files, such as binaries, text files, or dot files
• Passing all CI (You should check it first to pass one of the validations in CI. However, you need to make sure your PR passes all CI after you submit it.)

[TaiYou-TW]

You should not only validate return value but also the side-effect. For instance, you should validate the object's variable as well.
You can look at https://github.com/SQLab/112-spring-software-testing/pull/90/files#diff-34815f5f09f6d4f80b9587c2f3f7c449454027de3fe5b63658697a8fd009a339R45-R50