New J2K: add multi-file conversion tests from old j2k

nj2k/testData/multiFile/FieldToProperty/JavaClass.java

@@ -0,0 +1,13 @@
+package test;
+
+public class JavaClass {
+    public int field = 0;
+
+    protected int myProperty = 0;
+
+    public int getProperty() {
+        return myProperty;
+    }
+
+    public static final String NAME = "Bar";
+}

nj2k/testData/multiFile/FieldToProperty/JavaClass.kt

@@ -0,0 +1,12 @@
+package test
+
+open class JavaClass {
+    @JvmField
+    var field = 0
+    var property = 0
+        protected set
+
+    companion object {
+        const val NAME = "Bar"
+    }
+}

nj2k/testData/multiFile/FieldToProperty/external/JavaFile.java

@@ -0,0 +1,15 @@
+package test;
+
+public class C extends JavaClass {
+    public void foo(JavaClass javaClass) {
+        javaClass.field++;
+        --javaClass.field;
+        myProperty = javaClass.field;
+        javaClass.field -= field;
+        field = myProperty;
+        field *= 2;
+        field = field * 2;
+
+        String s = JavaClass.NAME;
+    }
+}

nj2k/testData/multiFile/FieldToProperty/external/JavaFile.java.expected

@@ -0,0 +1,15 @@
+package test;
+
+public class C extends JavaClass {
+    public void foo(JavaClass javaClass) {
+        javaClass.field++;
+        --javaClass.field;
+        property = javaClass.field;
+        javaClass.field -= field;
+        field = property;
+        field *= 2;
+        field = field * 2;
+
+        String s = JavaClass.NAME;
+    }
+}

nj2k/testData/multiFile/FieldToProperty/external/KotlinFile.kt

@@ -0,0 +1,10 @@
+package test
+
+class C : JavaClass() {
+    public fun foo(javaClass: JavaClass) {
+        javaClass.field++
+        myProperty = javaClass.field
+        field = myProperty
+        field *= 2
+    }
+}

nj2k/testData/multiFile/FieldToProperty/external/KotlinFile.kt.expected

@@ -0,0 +1,10 @@
+package test
+
+class C : JavaClass() {
+    public fun foo(javaClass: JavaClass) {
+        javaClass.field++
+        property = javaClass.field
+        field = property
+        field *= 2
+    }
+}