KT-1051 Java interoperability completion - tests

idea/testData/completion/injava/JetClassInJava.java

@@ -0,0 +1,7 @@
+public class Testing {
+    public static void test() {
+        ClassFr<caret>
+    }
+}
+
+// EXIST: ClassFromJet

idea/testData/completion/injava/JetClassInJava.kt

@@ -0,0 +1,4 @@
+package jettesting
+
+class ClassFromJet {
+}

idea/testData/completion/injava/JetSubpackage.java

@@ -0,0 +1,7 @@
+public class Testing {
+    public static void test() {
+        testing.<caret>
+    }
+}
+
+// EXIST: jet

idea/testData/completion/injava/JetSubpackage.kt

@@ -0,0 +1,4 @@
+package testing.jet
+
+fun somefun() {
+}