Save system properties in incremental jps tests

Original commit: d53cd3c70b

jps/jps-plugin/test/org/jetbrains/kotlin/jps/build/AbstractIncrementalJpsTest.kt

@@ -53,6 +53,7 @@ import org.jetbrains.kotlin.jps.incremental.getKotlinCache
 import org.jetbrains.kotlin.test.KotlinTestUtils
 import org.jetbrains.kotlin.utils.Printer
 import org.jetbrains.kotlin.utils.keysToMap
+import java.io.ByteArrayInputStream
 import java.io.ByteArrayOutputStream
 import java.io.File
 import java.io.PrintStream
@@ -106,14 +107,25 @@ public abstract class AbstractIncrementalJpsTest(
         Logger.getRootLogger().addAppender(console)
     }
 
+    private val systemPropertiesBackup = run {
+        val props = System.getProperties()
+        val output = ByteArrayOutputStream()
+        props.store(output, "System properties backup")
+        output.toByteArray()
+    }
+
+    private fun restoreSystemProperties() {
+        val input = ByteArrayInputStream(systemPropertiesBackup)
+        val props = Properties()
+        props.load(input)
+        System.setProperties(props)
+    }
+
     override fun setUp() {
         super.setUp()
         System.setProperty("kotlin.jps.tests", "true")
         lookupsDuringTest = hashSetOf()
-
-        if (enableExperimentalIncrementalCompilation) {
-            IncrementalCompilation.enableExperimental()
-        }
+        IncrementalCompilation.setIsExperimental(enableExperimentalIncrementalCompilation)
 
         if (DEBUG_LOGGING_ENABLED) {
             enableDebugLogging()
@@ -121,12 +133,7 @@ public abstract class AbstractIncrementalJpsTest(
     }
 
     override fun tearDown() {
-        System.clearProperty("kotlin.jps.tests")
-
-        if (enableExperimentalIncrementalCompilation) {
-            IncrementalCompilation.disableExperimental()
-        }
-
+        restoreSystemProperties()
         super.tearDown()
     }
 

jps/jps-plugin/test/org/jetbrains/kotlin/jps/build/AbstractIncrementalLazyCachesTest.kt

@@ -33,16 +33,11 @@ public abstract class AbstractIncrementalLazyCachesTest : AbstractIncrementalJps
         get() = "expected-kotlin-caches.txt"
 
     override fun doTest(testDataPath: String) {
-        try {
-            super.doTest(testDataPath)
+        super.doTest(testDataPath)
 
-            val actual = dumpKotlinCachesFileNames()
-            val expectedFile = File(testDataPath, expectedCachesFileName)
-            UsefulTestCase.assertSameLinesWithFile(expectedFile.canonicalPath, actual)
-        }
-        finally {
-            IncrementalCompilation.enableIncrementalCompilation()
-        }
+        val actual = dumpKotlinCachesFileNames()
+        val expectedFile = File(testDataPath, expectedCachesFileName)
+        UsefulTestCase.assertSameLinesWithFile(expectedFile.canonicalPath, actual)
     }
 
     override fun performAdditionalModifications(modifications: List<AbstractIncrementalJpsTest.Modification>) {
@@ -55,20 +50,10 @@ public abstract class AbstractIncrementalLazyCachesTest : AbstractIncrementalJps
 
             when {
                 name.endsWith("incremental-compilation") -> {
-                    if (modification.dataFile.readAsBool()) {
-                        IncrementalCompilation.enableIncrementalCompilation()
-                    }
-                    else {
-                        IncrementalCompilation.disableIncrementalCompilation()
-                    }
+                    IncrementalCompilation.setIsEnabled(modification.dataFile.readAsBool())
                 }
                 name.endsWith("experimental-compilation") -> {
-                    if (modification.dataFile.readAsBool()) {
-                        IncrementalCompilation.enableExperimental()
-                    }
-                    else {
-                        IncrementalCompilation.disableExperimental()
-                    }
+                    IncrementalCompilation.setIsExperimental(modification.dataFile.readAsBool())
                 }
             }
         }

jps/jps-plugin/test/org/jetbrains/kotlin/jps/build/experimentalIncrementalCompilationTests.kt

@@ -31,13 +31,7 @@ abstract class AbstractExperimentalIncrementalLazyCachesTest : AbstractIncrement
         get() = "experimental-expected-kotlin-caches.txt"
 }
 
-abstract class AbstractExperimentalChangeIncrementalOptionTest : AbstractIncrementalLazyCachesTest() {
-    override fun setUp() {
-        super.setUp()
-        IncrementalCompilation.enableIncrementalCompilation()
-        IncrementalCompilation.disableExperimental()
-    }
-}
+abstract class AbstractExperimentalChangeIncrementalOptionTest : AbstractIncrementalLazyCachesTest()
 
 abstract class AbstractExperimentalIncrementalCacheVersionChangedTest : AbstractIncrementalCacheVersionChangedTest() {
     override val enableExperimentalIncrementalCompilation = true