first try on binary serialization

build.zig

@@ -16,22 +16,18 @@ pub fn build(b: *std.Build) void {
     b.installArtifact(exe);
 
     const run_step = b.step("run", "Run the app");
-
     const run_cmd = b.addRunArtifact(exe);
     run_step.dependOn(&run_cmd.step);
-
     run_cmd.step.dependOn(b.getInstallStep());
 
     if (b.args) |args| {
         run_cmd.addArgs(args);
     }
 
-    const exe_tests = b.addTest(.{
+    const tests = b.addTest(.{
         .root_module = exe.root_module,
     });
-
+    const run_tests = b.addRunArtifact(tests);
-    const run_exe_tests = b.addRunArtifact(exe_tests);
-
     const test_step = b.step("test", "Run tests");
-    test_step.dependOn(&run_exe_tests.step);
+    test_step.dependOn(&run_tests.step);
 }

src/main.zig

@@ -1,9 +1,14 @@
 const std = @import("std");
+const x = @import("protocol.zig");
 
 pub fn main() !void {
     std.debug.print("All your {s} are belong to us.\n", .{"codebase"});
 }
 
+test {
+    _ = @import("protocol.zig");
+}
+
 test "simple test" {
     const gpa = std.testing.allocator;
     var list: std.ArrayList(i32) = .empty;
@@ -11,14 +16,3 @@ test "simple test" {
     try list.append(gpa, 42);
     try std.testing.expectEqual(@as(i32, 42), list.pop());
 }
-
-test "fuzz example" {
-    const Context = struct {
-        fn testOne(context: @This(), input: []const u8) anyerror!void {
-            _ = context;
-            // Try passing `--fuzz` to `zig build test` and see if it manages to fail this test case!
-            try std.testing.expect(!std.mem.eql(u8, "canyoufindme", input));
-        }
-    };
-    try std.testing.fuzz(Context{}, Context.testOne, .{});
-}

src/protocol.zig

@@ -0,0 +1,32 @@
+const std = @import("std");
+
+const DataV1 = struct {
+    // TODO: Implement version!!
+    // version: i8,
+    count: u8,
+};
+
+const SerializationError = error{ VersionDoesNotMatchError, OtherError };
+
+fn deserialize(input: []u8) SerializationError!DataV1 {
+    if (input.len == 0) {
+        return SerializationError.OtherError;
+    }
+
+    return .{ .count = input[0] };
+}
+fn serialize(allocator: std.mem.Allocator, input: DataV1) ![]u8 {
+    const data = try allocator.alloc(u8, 1);
+    data[0] = input.count;
+    return data;
+}
+
+test "expect DataV1 can be serialized and deserialized" {
+    const expected: DataV1 = .{ .count = 128 };
+    const serialized = try serialize(std.testing.allocator, expected);
+    defer std.testing.allocator.free(serialized);
+
+    const actual = try deserialize(serialized);
+
+    try std.testing.expectEqual(expected, actual);
+}