lang: add tests

- lang: add deinit()

src/lang.zig

@@ -141,6 +141,10 @@ pub const Lang = struct {
         };
     }
 
+    pub fn deinit(self: *Lang) void {
+        self.keywords.deinit();
+    }
+
     fn fillKeywords(self: *Lang) !void {
         _ = try self.keywords.put("noop", .Noop);
         _ = try self.keywords.put("load", .Load);
@@ -273,4 +277,24 @@ pub const Lang = struct {
     }
 };
 
-// TODO tests
+test "noop" {
+    var lang = Lang.init(std.heap.direct_allocator);
+    var cmds = try lang.parse("noop;");
+    std.testing.expectEqual(cmds.len, 1);
+    std.testing.expectEqual(cmds.at(0).command, .Noop);
+}
+
+test "load, phaser, quicksave" {
+    var lang = Lang.init(std.heap.direct_allocator);
+    const prog =
+        \\load :0;
+        \\phaser 3 1 25 0.25 0 1;
+        \\quicksave;
+    ;
+    var cmds = try lang.parse(prog);
+
+    std.testing.expectEqual(cmds.len, 3);
+    std.testing.expectEqual(cmds.at(0).command, .Load);
+    std.testing.expectEqual(cmds.at(1).command, .Phaser);
+    std.testing.expectEqual(cmds.at(2).command, .Quicksave);
+}

src/main.zig

@@ -2,6 +2,10 @@ const std = @import("std");
 const langs = @import("lang.zig");
 const runners = @import("runner.zig");
 
+test "scritcher" {
+    _ = @import("lang.zig");
+}
+
 pub fn main() !void {
     var arena = std.heap.ArenaAllocator.init(std.heap.c_allocator);
     defer arena.deinit();
@@ -9,7 +13,7 @@ pub fn main() !void {
     const allocator = &arena.allocator;
 
     var lang = langs.Lang.init(allocator);
-    //defer lang.deinit();
+    defer lang.deinit();
 
     var runner = runners.Runner.init(allocator);
     defer runner.deinit();