diff --git a/src/backend/Assembly.zig b/src/backend/Assembly.zig
index 914bffb033bfff5923a987cb6e997a23973c3155..d5514aefba12b8d57caaa9e5fdbdec7bd87b5dd7 100644
--- a/src/backend/Assembly.zig
+++ b/src/backend/Assembly.zig
@@ -1,5 +1,6 @@
 const std = @import("std");
 const Allocator = std.mem.Allocator;
+const testing = std.testing;
 
 data: []const u8,
 text: []const u8,
@@ -18,3 +19,82 @@ pub fn writeToAllFile(self: Assembly, file: std.fs.File) !void {
     };
     return file.writevAll(&vec);
 }
+
+test "Assembly writeToAllFile with empty data and text" {
+    var arena = std.heap.ArenaAllocator.init(testing.allocator);
+    defer arena.deinit();
+    const gpa = arena.allocator();
+
+    const asm = Assembly{
+        .data = try gpa.dupe(u8, ""),
+        .text = try gpa.dupe(u8, ""),
+    };
+    defer asm.deinit(gpa);
+
+    var file = std.io.FixedBufferStream([]u8).init(try gpa.alloc(u8, 0));
+    try asm.writeToAllFile(file.writer());
+    try testing.expectEqualStrings("", file.getWritten());
+}
+
+test "Assembly writeToAllFile with data only" {
+    var arena = std.heap.ArenaAllocator.init(testing.allocator);
+    defer arena.deinit();
+    const gpa = arena.allocator();
+
+    const asm = Assembly{
+        .data = try gpa.dupe(u8, ".data section"),
+        .text = try gpa.dupe(u8, ""),
+    };
+    defer asm.deinit(gpa);
+
+    var buf: [100]u8 = undefined;
+    var file = std.io.FixedBufferStream([]u8).init(&buf);
+    try asm.writeToAllFile(file.writer());
+    try testing.expectEqualStrings(".data section", file.getWritten());
+}
+
+test "Assembly writeToAllFile with text only" {
+    var arena = std.heap.ArenaAllocator.init(testing.allocator);
+    defer arena.deinit();
+    const gpa = arena.allocator();
+
+    const asm = Assembly{
+        .data = try gpa.dupe(u8, ""),
+        .text = try gpa.dupe(u8, ".text section"),
+    };
+    defer asm.deinit(gpa);
+
+    var buf: [100]u8 = undefined;
+    var file = std.io.FixedBufferStream([]u8).init(&buf);
+    try asm.writeToAllFile(file.writer());
+    try testing.expectEqualStrings(".text section", file.getWritten());
+}
+
+test "Assembly writeToAllFile with both data and text" {
+    var arena = std.heap.ArenaAllocator.init(testing.allocator);
+    defer arena.deinit();
+    const gpa = arena.allocator();
+
+    const asm = Assembly{
+        .data = try gpa.dupe(u8, "DATA"),
+        .text = try gpa.dupe(u8, "TEXT"),
+    };
+    defer asm.deinit(gpa);
+
+    var buf: [100]u8 = undefined;
+    var file = std.io.FixedBufferStream([]u8).init(&buf);
+    try asm.writeToAllFile(file.writer());
+    try testing.expectEqualStrings("DATATEXT", file.getWritten());
+}
+
+test "Assembly deinit frees memory" {
+    var arena = std.heap.ArenaAllocator.init(testing.allocator);
+    defer arena.deinit();
+    const gpa = arena.allocator();
+
+    const asm = Assembly{
+        .data = try gpa.dupe(u8, "test data"),
+        .text = try gpa.dupe(u8, "test text"),
+    };
+    asm.deinit(gpa);
+}