test: migrate CompilationUnitPrintTest to junit 5

[MartinWitt]

#3919
The following has changed in the code:
Replaced junit 4 test annotation with junit 5 test annotation in test
Transformed junit4 assert to junit 5 assertion in test

[monperrus]

thanks @MartinWitt would you share the code of the transformation?

[MartinWitt]

The project is more or less here, https://github.com/MartinWitt/laughing-train.

[algomaster99]

@monperrus We could use the script for bumping Junit4 to Junit5 in gumtree-spoon. I can head that.

[algomaster99]

@MartinWitt How could I apply transformations for updating Junit for this project? The README for your project considers three separate transformations.

[MartinWitt]

Oh, I have three different kind of bad smell fixes planed, but currently the only real working and useful is JUnit transformation.
You have three ways to apply it.

Single File:

@Test
	void refactorTests3() throws IOException, InvalidRemoteException, GitAPIException {
		new TransformationEngine().applyToGivenPath(
				"PathToTests",
				"NameOfClassToRefactor", RunMode.FULL);
	}

All Files

@Test
	void refactorTests3() throws IOException {
		new TransformationEngine().applyToGivenPath(
				"PathToTests",
				 RunMode.FULL);
	}

Git Repo with changelog

For the git version you need to edit https://github.com/MartinWitt/laughing-train/blob/master/code-transformation/src/main/resources/app.properties

@Test
public void bar() throws IOException, InvalidRemoteException, GitAPIException {
String path = ProjectPath
String filename = TypeToRefactorName
String repoPath = PathToLocalGitRepo
CommitBuilder.refactorRepo(repoPath, path, filename,
	(v, u) -> {
		return new TransformationEngine().applyToGivenPath(path, filename, RunMode.FULL);
})};

If you want to change which processor is used uncomment them here https://github.com/MartinWitt/laughing-train/blob/master/code-transformation/src/main/java/xyz/keksdose/spoon/code_solver/TransformationEngine.java#L73