ft: add first basic test

src/disasm.rs

@@ -829,3 +829,36 @@ impl Disassembler {
         Ok(instructions)
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_basic() {
+        let text = Vec::from([0x0, 0x0]);
+        let mut disassembler = Disassembler {
+            offset: 0,
+            text,
+            instruction: Instruction::new(),
+        };
+        let instructions = disassembler.decode_instructions().ok();
+        if let Some(instrs) = instructions {
+            assert_eq!(
+                instrs[0],
+                Instruction {
+                    start: 0,
+                    raw: Vec::from([0, 0]),
+                    opcode: Mnemonic::ADD_FromReg(
+                        ModRmTarget::Memory(MemoryIndex {
+                            base: Some(Register::BX),
+                            index: Some(Register::SI),
+                            displacement: None
+                        }),
+                        Register::AL
+                    )
+                }
+            )
+        }
+    }
+}