Parallel Letter Frequency

zig/hello-world/test_hello_world.zig

@@ -0,0 +1,10 @@
+const std = @import("std");
+const testing = std.testing;
+
+const hello_world = @import("hello_world.zig");
+
+test "say hi!" {
+    const expected = "Hello, World!";
+    const actual = hello_world.hello();
+    try testing.expectEqualStrings(expected, actual);
+}