From fdae0442878efb258a48e1326f899c5b404ad75c Mon Sep 17 00:00:00 2001
From: volodya-lombrozo <volodya.lombrozo@gmail.com>
Date: Wed, 13 Mar 2024 14:38:26 +0300
Subject: [PATCH] feat(#488): handle all opcodes up to 53 instruction

---
 .../src/main/java/org/eolang/jeo/Bar.java           |  5 +++++
 src/it/spring-fat/pom.xml                           |  2 +-
 .../bytecode/BytecodeInstructionEntry.java          |  7 +++++++
 .../representation/bytecode/BytecodeClassTest.java  | 13 +++++++++++++
 4 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/src/it/custom-transformations/src/main/java/org/eolang/jeo/Bar.java b/src/it/custom-transformations/src/main/java/org/eolang/jeo/Bar.java
index 8719670b7..2fd8b3f97 100644
--- a/src/it/custom-transformations/src/main/java/org/eolang/jeo/Bar.java
+++ b/src/it/custom-transformations/src/main/java/org/eolang/jeo/Bar.java
@@ -7,4 +7,9 @@ public int foo(int x) {
         }
         return 2;
     }
+
+    public void sipush() {
+        short s = 256;
+        System.out.println(s);
+    }
 }
\ No newline at end of file
diff --git a/src/it/spring-fat/pom.xml b/src/it/spring-fat/pom.xml
index f512d15a0..971b0db05 100644
--- a/src/it/spring-fat/pom.xml
+++ b/src/it/spring-fat/pom.xml
@@ -90,7 +90,7 @@ SOFTWARE.
              support many java features. We need to implement them and enable
              the test.
           -->
-          <disabled>true</disabled>
+          <disabled>false</disabled>
         </configuration>
         <executions>
           <execution>
diff --git a/src/main/java/org/eolang/jeo/representation/bytecode/BytecodeInstructionEntry.java b/src/main/java/org/eolang/jeo/representation/bytecode/BytecodeInstructionEntry.java
index d00c68284..c8b8b75f7 100644
--- a/src/main/java/org/eolang/jeo/representation/bytecode/BytecodeInstructionEntry.java
+++ b/src/main/java/org/eolang/jeo/representation/bytecode/BytecodeInstructionEntry.java
@@ -225,6 +225,13 @@ private enum Instruction {
             visitor.visitIntInsn(Opcodes.BIPUSH, (int) arguments.get(0))
         ),
 
+        /**
+         * Push a short onto the stack as an integer value.
+         */
+        SIPUSH(Opcodes.SIPUSH, (visitor, arguments) ->
+            visitor.visitIntInsn(Opcodes.SIPUSH, (int) arguments.get(0))
+        ),
+
         /**
          * Push a constant #index from a constant pool onto the stack.
          */
diff --git a/src/test/java/org/eolang/jeo/representation/bytecode/BytecodeClassTest.java b/src/test/java/org/eolang/jeo/representation/bytecode/BytecodeClassTest.java
index dcb970563..71fb2a3bc 100644
--- a/src/test/java/org/eolang/jeo/representation/bytecode/BytecodeClassTest.java
+++ b/src/test/java/org/eolang/jeo/representation/bytecode/BytecodeClassTest.java
@@ -193,4 +193,17 @@ void failsBecauseBytecodeIsBroken() {
             "We expect an exception here because the bytecode is broken"
         );
     }
+
+    @Test
+    void returnsShortValue() {
+        Assertions.assertDoesNotThrow(
+            () -> new BytecodeClass("ShortValue")
+                .withMethod("j$foo", "()S", Opcodes.ACC_PUBLIC)
+                .opcode(Opcodes.SIPUSH, 256)
+                .opcode(Opcodes.IRETURN)
+                .up()
+                .bytecode(),
+            "We expect no exception here because all instructions are valid"
+        );
+    }
 }