Add tests to I/O module

src/io.zig

@@ -7,7 +7,28 @@ const std = @import("std");
 ///
 pub const Writer = struct {
     context: *anyopaque,
-    operation: fn (*anyopaque, []const u8) usize,
+    writeContext: fn (*anyopaque, []const u8) usize,
+
+    ///
+    ///
+    ///
+    pub const Radix = enum {
+        binary,
+        tinary,
+        quaternary,
+        quinary,
+        senary,
+        septenary,
+        octal,
+        nonary,
+        decimal,
+        undecimal,
+        duodecimal,
+        tridecimal,
+        tetradecimal,
+        pentadecimal,
+        hexadecimal,
+    };
 
     ///
     /// Wraps and returns a reference to `write_context` of type `WriteContext` and its associated
@@ -21,7 +42,7 @@ pub const Writer = struct {
         return .{
             .context = write_context,
 
-            .operation = struct {
+            .writeContext = struct {
                 fn write(context: *anyopaque, buffer: []const u8) usize {
                     return writeContext(@ptrCast(*WriteContext,
                         @alignCast(@alignOf(WriteContext), context)), buffer);
@@ -35,7 +56,7 @@ pub const Writer = struct {
     /// were successfully written.
     ///
     pub fn write(writer: Writer, buffer: []const u8) usize {
-        return writer.operation(writer.context, buffer);
+        return writer.writeContext(writer.context, buffer);
     }
 
     ///
@@ -43,7 +64,7 @@ pub const Writer = struct {
     /// otherwise `false`.
     ///
     pub fn writeByte(writer: Writer, byte: u8) bool {
-        return (writer.operation(writer.context,
+        return (writer.writeContext(writer.context,
             @ptrCast([*]const u8, &byte)[0 .. 1]) != 0);
     }
 
@@ -51,10 +72,10 @@ pub const Writer = struct {
     /// Writes `value` as a ASCII / UTF-8 encoded integer to `writer`, returning `true` if the full
     /// sequence was successfully written, otherwise `false`.
     ///
-    /// The `base` argument identifies which base system to encode `value` as, with `10` being
+    /// The `radix` argument identifies which base system to encode `value` as, with `10` being
     /// decimal, `16` being hexadecimal, `8` being octal`, so on and so forth.
     ///
-    pub fn writeInt(writer: Writer, value: anytype, base: u4) bool {
+    pub fn writeInt(writer: Writer, radix: Radix, value: anytype) bool {
         const Int = @TypeOf(value);
         const type_info = @typeInfo(Int);
 
@@ -62,6 +83,7 @@ pub const Writer = struct {
 
         if (value == 0) return writer.writeByte('0');
 
+        // TODO: Unhardcode this as it will break with large ints.
         var buffer = std.mem.zeroes([28]u8);
         var buffer_count = @as(usize, 0);
         var n1 = value;
@@ -74,6 +96,8 @@ pub const Writer = struct {
         }
 
         while (n1 != 0) {
+            const base = @enumToInt(radix);
+
             buffer[buffer_count] = @intCast(u8, (n1 % base) + '0');
             n1 = (n1 / base);
             buffer_count += 1;
@@ -106,3 +130,16 @@ pub const null_writer = Writer{
         }
     }.write,
 };
+
+test {
+    const testing = std.testing;
+
+    {
+        const sequence = "foo";
+
+        testing.expectEqual(null_writer.write(sequence), sequence.len);
+    }
+
+    testing.expect(null_writer.writeByte(0));
+    testing.expect(null_writer.writeInt(.decimal, 420));
+}

src/main.zig

@@ -15,7 +15,7 @@ pub fn main() anyerror!void {
 }
 
 test {
-    _ = @import("./mem.zig");
+
 }
 
 fn run(event_loop: *sys.EventLoop, graphics: *sys.GraphicsContext) anyerror!void {
@@ -27,7 +27,7 @@ fn run(event_loop: *sys.EventLoop, graphics: *sys.GraphicsContext) anyerror!void
         const file_access = try event_loop.open(.readonly,
             try sys.FileSystem.data.joinedPath(&.{"data", "ona.lua"}));
 
-        defer _ = event_loop.close(file_access);
+        defer event_loop.close(file_access);
 
         const file_size = try file_access.size(event_loop);
         const allocator = gpa.allocator();