TEST: Coercion to Unit and ++/-- tests. (#87)

backend.native/tests/build.gradle

@@ -398,6 +398,11 @@ task throw0(type: RunKonanTest) {
     source = "runtime/basic/throw0.kt"
 }
 
+task statements0(type: RunKonanTest) {
+    goldValue = "239\n238\n30\n29\n"
+    source = "runtime/basic/statements0.kt"
+}
+
 /*
 task boxing0(type: RunKonanTest) {
     goldValue = "17\n"

backend.native/tests/runtime/basic/statements0.kt

@@ -0,0 +1,32 @@
+fun simple() {
+    var a = 238
+    a++
+    println(a)
+    --a
+    println(a)
+}
+
+class Foo() {
+    var i = 29
+
+    fun more() {
+        i++
+    }
+
+    fun less() {
+        --i
+    }
+}
+
+fun fields() {
+    val foo = Foo()
+    foo.more()
+    println(foo.i)
+    foo.less()
+    println(foo.i)
+}
+
+fun main(args: Array<String>) {
+    simple()
+    fields()
+}