Moved tests from spotbugs project to spotbugs-tests project

The only change except moving sources is to configure two unstable tests
run before all other tests - this avoids the failure that can't be
observed if running tests one by one.

Fixes #1914

CHANGELOG.md

@@ -7,6 +7,7 @@ Currently the versioning policy of this project follows [Semantic Versioning v2.
 ## Unreleased - 2022-??-??
 ### Fixed
 - Fixed spotbugs build with ecj compiler ([#1903](https://github.com/spotbugs/spotbugs/issues/1903))
+- Moved tests from spotbugs project to spotbugs-tests project ([#1914](https://github.com/spotbugs/spotbugs/issues/1914))
 
 ## 4.5.3 - 2022-01-04
 ### Security

spotbugs-tests/build.gradle

@@ -35,9 +35,24 @@ tasks.named('jacocoTestReport', JacocoReport).configure {
   additionalClassDirs.setFrom files(project(':spotbugs').sourceSets.main.output.classesDirs)
 }
 
-tasks.named('test').configure {
-  dependsOn ':spotbugsTestCases:build'
-  maxHeapSize = '2G'
+// Tests below fail if executed with other tests
+// So we run them before all other tests are executed
+task unstableTest(type: Test) {
+  filter {
+    includeTestsMatching "PlaceholderTest"
+    includeTestsMatching "MutableClassesTest"
+  }
+  testLogging {
+    events "passed", "skipped", "failed"
+  }
+}
+
+test {
+  dependsOn ':spotbugsTestCases:build', 'unstableTest'
+  filter {
+    excludeTestsMatching "PlaceholderTest"
+    excludeTestsMatching "MutableClassesTest"
+  }
 }
 
 spotbugs {