feat(#217): save hardcoded value about jump label

src/main/java/org/eolang/jeo/representation/directives/DirectivesMethod.java

@@ -82,7 +82,15 @@ public void visitIntInsn(final int opcode, final int operand) {
 
     @Override
     public void visitJumpInsn(final int opcode, final Label label) {
-        this.opcode(opcode, label);
+        // @checkstyle MethodBodyCommentsCheck (10 lines)
+        // @todo #217:90min Save correct label value into XMIR.
+        //  Currently we just save hardcoded value about label to the XMIR, which is wrong,
+        //  of course. The problem here is that we can't directly use Label#getOffset() method
+        //  since label offset will be set later (not here). So we have to handle that problem
+        //  somehow and save correct Label value. Don't forget to write integration tests
+        //  for if/else and loops control-flow statements. The tests should check correct
+        //  transformation bytecode -> XMIR -> bytecode.
+        this.opcode(opcode, 0);
         super.visitJumpInsn(opcode, label);
     }
 

src/test/java/org/eolang/jeo/representation/HexDataTest.java

@@ -32,7 +32,7 @@
 
 /**
  * Test cases for {@link org.eolang.jeo.representation.HexData}.
- * @since 0.1.
+ * @since 0.1
  */
 class HexDataTest {
 
@@ -94,5 +94,4 @@ static Stream<Arguments> values() {
             Arguments.of(0.1d, "3F B9 99 99 99 99 99 9A")
         );
     }
-
-}
+}