test: migrate LoopSniperJavaPrettyPrinterTest to JUnit 5

[MartinWitt]

#3919

Change Log

The following bad smells are refactored:

Junit4-@BeforeClass

The JUnit 4 @BeforeClass annotation should be replaced with JUnit 5 @BeforeAll annotation.

Junit4-@ignore

The JUnit 4 @Ignore annotation should be replaced with JUnit 5 @Disabled annotation.

JUnit4-@test

The JUnit 4 @Test annotation should be replaced with JUnit 5 @Test annotation.

JUnit4-AssertThat

AssertThat in Junit 4 is deprecated. Use AssertThat in Hamcrest instead.

The following has changed in the code:

Junit4-@BeforeClass

• Replaced @BeforeClass annotation with @BeforeAll at method setup

JUnit4-@test

• Replaced junit 4 test annotation with junit 5 test annotation in forNoBraces
• Replaced junit 4 test annotation with junit 5 test annotation in forEachBraces
• Replaced junit 4 test annotation with junit 5 test annotation in whileNoBraces
• Replaced junit 4 test annotation with junit 5 test annotation in whileWithBraces

JUnit4-AssertThat

• Replaced Assert.assertThat with MatcherAssert.assertThat in runSniperJavaPrettyPrinter
• Replaced Assert.assertThat with MatcherAssert.assertThat in runSniperJavaPrettyPrinter
• Replaced Assert.assertThat with MatcherAssert.assertThat in runSniperJavaPrettyPrinter

Junit4-@ignore

• Replaced @Ignore annotation with @Disabled at method whileWithBraces