Fixing some tests that fail because of environment setups.

[sainthkh]

↪️ Pull Request

Sometimes, we cannot pass some tests because:

• Java isn't installed or configured. Then, Kotlin test fails. (It's really rare for developers' computer to not have Java. Unfortunately, mine is one of them...)
• symlinkSync throws EPERM error. On Windows 10, creating symlinks is disabled for security.

So, I changed these:

• Ignore Kotlin test when there is no Java. I borrowed structure and message from Rust.
• Show warning message and instruction link to the cmd Admin article when symlink fails.

💻 Examples

None

🚨 Test instructions

1. git clone https://github.com/parcel-bundler/parcel.git on Windows 10.
2. yarn test
3. Test fails.

✔️ PR Todo

• [V] Added/updated unit tests for this change
• [V] Filled out test instructions (In case there aren't any unit tests)
• [] Included links to related issues/PRs

[DeMoorJasper]

Not sure if this should be part of utils.
We should probably make a utils package for testing Parcel and Parcel plugins somewhere in the future to prevent installing test specific utils to every users download of Parcel.

For now this is good enough though.

[sainthkh]

As you know, parcel-bundler/test/utils.js and integration-tests/test/utils.js are exactly same. Because of that, I wondered what to do.

Now I found the test-util package. How about moving this to that package?

[DeMoorJasper]

Probably a good idea, didn't know there was a test-utils package already

[sainthkh]

Just a question:

How about merging parcel-bundler/test/utils.js and integration-tests/test/utils.js to test-utils/utils.js this time?