Add psi tests with the simplest test data

idea/testData/debugger/sequence/psi/streams/negative/Simple.kt

@@ -0,0 +1,6 @@
+import java.util.stream.Stream
+
+fun main(args: Array<String>) {
+  val a<caret> = 100
+  Stream.of(1, 2, 3).toArray()
+}

idea/testData/debugger/sequence/psi/streams/positive/Simple.kt

@@ -0,0 +1,5 @@
+import java.util.stream.Stream
+
+fun main(args: Array<String>) {
+  Stream.of(1, 2, 3).toAr<caret>ray()
+}

idea/testData/debugger/sequence/psi/streams/positive/streamex/Simple.kt

@@ -0,0 +1,5 @@
+import one.util.streamex.StreamEx
+
+fun main(args: Array<String>) {
+  StreamEx.of(1, 2, 3).to<caret>Array()
+}

idea/tests/com/intellij/debugger/streams/kotlin/KotlinPsiChainBuilderTestCase.kt

@@ -0,0 +1,41 @@
+package com.intellij.debugger.streams.kotlin
+
+import com.intellij.debugger.streams.test.StreamChainBuilderTestCase
+import com.intellij.debugger.streams.wrapper.StreamChain
+import com.intellij.debugger.streams.wrapper.StreamChainBuilder
+import junit.framework.TestCase
+import java.io.File
+import java.nio.file.Paths
+
+/**
+ * @author Vitaliy.Bibaev
+ */
+abstract class KotlinPsiChainBuilderTestCase(private val relativePath: String) : StreamChainBuilderTestCase() {
+  override fun getTestDataPath(): String = Paths.get(File("").absolutePath, "/testData/psi/$relativeTestPath/").toString()
+  override fun getFileExtension(): String = ".kt"
+  abstract val kotlinChainBuilder: StreamChainBuilder
+
+  override final fun getChainBuilder(): StreamChainBuilder = kotlinChainBuilder
+
+  protected abstract fun doTest()
+
+  override final fun getRelativeTestPath(): String = relativePath
+
+  abstract class Positive(relativePath: String) : KotlinPsiChainBuilderTestCase(relativePath) {
+    override fun doTest() {
+      val chains = buildChains()
+      checkChains(chains)
+    }
+
+    protected fun checkChains(chains: MutableList<StreamChain>) {
+      TestCase.assertFalse(chains.isEmpty())
+    }
+  }
+
+  abstract class Negative(relativePath: String) : KotlinPsiChainBuilderTestCase(relativePath) {
+    override fun doTest() {
+      val elementAtCaret = configureAndGetElementAtCaret()
+      TestCase.assertFalse(chainBuilder.isChainExists(elementAtCaret))
+    }
+  }
+}

idea/tests/com/intellij/debugger/streams/kotlin/psi/java/NegativeJavaStreamTest.kt

@@ -0,0 +1,16 @@
+package com.intellij.debugger.streams.kotlin.psi.java
+
+import com.intellij.debugger.streams.kotlin.KotlinPsiChainBuilderTestCase
+import com.intellij.debugger.streams.kotlin.lib.JavaStandardLibrarySupportProvider
+import com.intellij.debugger.streams.wrapper.StreamChainBuilder
+
+/**
+ * @author Vitaliy.Bibaev
+ */
+class NegativeJavaStreamTest : KotlinPsiChainBuilderTestCase.Negative("streams/negative") {
+  override val kotlinChainBuilder: StreamChainBuilder = JavaStandardLibrarySupportProvider().chainBuilder
+
+  fun testSimple() {
+    doTest()
+  }
+}

idea/tests/com/intellij/debugger/streams/kotlin/psi/java/PositiveJavaStreamTest.kt

@@ -0,0 +1,16 @@
+package com.intellij.debugger.streams.kotlin.psi.java
+
+import com.intellij.debugger.streams.kotlin.KotlinPsiChainBuilderTestCase
+import com.intellij.debugger.streams.kotlin.lib.JavaStandardLibrarySupportProvider
+import com.intellij.debugger.streams.wrapper.StreamChainBuilder
+
+/**
+ * @author Vitaliy.Bibaev
+ */
+class PositiveJavaStreamTest : KotlinPsiChainBuilderTestCase.Positive("streams/positive") {
+  override val kotlinChainBuilder: StreamChainBuilder = JavaStandardLibrarySupportProvider().chainBuilder
+
+  fun testSimple() {
+    doTest()
+  }
+}

idea/tests/com/intellij/debugger/streams/kotlin/psi/java/PositiveStreamExTest.kt

@@ -0,0 +1,16 @@
+package com.intellij.debugger.streams.kotlin.psi.java
+
+import com.intellij.debugger.streams.kotlin.KotlinPsiChainBuilderTestCase
+import com.intellij.debugger.streams.kotlin.lib.StreamExLibrarySupportProvider
+import com.intellij.debugger.streams.wrapper.StreamChainBuilder
+
+/**
+ * @author Vitaliy.Bibaev
+ */
+class PositiveStreamExTest : KotlinPsiChainBuilderTestCase.Positive("streams/positive/streamex") {
+  override val kotlinChainBuilder: StreamChainBuilder = StreamExLibrarySupportProvider().chainBuilder
+
+  fun testSimple() {
+    doTest()
+  }
+}