Fix tests for unions

Author: kornilova203

tests/samples/Union.c

@@ -1,8 +1,6 @@
 #include "Union.h"
 #include <stdlib.h>
 
-union values *getValues() {
-    union values *myValues = malloc(sizeof(union values));
-    myValues->a = 10;
-    return myValues;
-}
+void setIntValue(union values *v) { v->i = 10; }
+
+void setLongValue(union values *v) { v->l = 10000000000; }

tests/samples/Union.h

@@ -1,7 +1,9 @@
 union values {
-    long a;
-    int b;
-    long long c;
+    long l;
+    int i;
+    long long ll;
 };
 
-union values *getValues();
+void setIntValue(union values *v);
+
+void setLongValue(union values *v);

tests/samples/Union.scala

@@ -7,19 +7,20 @@ import scala.scalanative.native._
 @native.extern
 object Union {
   type union_values = native.CArray[Byte, native.Nat._8]
-  def getValues(): native.Ptr[union_values] = native.extern
+  def setIntValue(v: native.Ptr[union_values]): Unit = native.extern
+  def setLongValue(v: native.Ptr[union_values]): Unit = native.extern
 }
 
 import Union._
 
 object UnionHelpers {
 
   implicit class union_values_pos(val p: native.Ptr[union_values]) extends AnyVal {
-    def a: native.Ptr[native.CLong] = p.cast[native.Ptr[native.CLong]]
-    def a_=(value: native.CLong): Unit = !p.cast[native.Ptr[native.CLong]] = value
-    def b: native.Ptr[native.CInt] = p.cast[native.Ptr[native.CInt]]
-    def b_=(value: native.CInt): Unit = !p.cast[native.Ptr[native.CInt]] = value
-    def c: native.Ptr[native.CLongLong] = p.cast[native.Ptr[native.CLongLong]]
-    def c_=(value: native.CLongLong): Unit = !p.cast[native.Ptr[native.CLongLong]] = value
+    def l: native.Ptr[native.CLong] = p.cast[native.Ptr[native.CLong]]
+    def l_=(value: native.CLong): Unit = !p.cast[native.Ptr[native.CLong]] = value
+    def i: native.Ptr[native.CInt] = p.cast[native.Ptr[native.CInt]]
+    def i_=(value: native.CInt): Unit = !p.cast[native.Ptr[native.CInt]] = value
+    def ll: native.Ptr[native.CLongLong] = p.cast[native.Ptr[native.CLongLong]]
+    def ll_=(value: native.CLongLong): Unit = !p.cast[native.Ptr[native.CLongLong]] = value
   }
 }

tests/samples/src/test/scala/org/scalanative/bindgen/samples/UnionTests.scala

@@ -7,8 +7,13 @@ import org.scalanative.bindgen.samples.UnionHelpers._
 object UnionTests extends TestSuite {
   val tests = Tests {
     'getValues - {
-      val point = Union.getValues()
-      assert(point.a == 10)
+      Zone {implicit zone =>
+        val structPtr = alloc[Union.union_values]
+        Union.setIntValue(structPtr)
+        assert(!structPtr.i == 10)
+        Union.setLongValue(structPtr)
+        assert(!structPtr.l == 10000000000L)
+      }
     }
   }
 }