1const std = @import("std");
 2
 3test "expectEqual demo" {
 4    const expected: i32 = 42;
 5    const actual = 42;
 6
 7    // The first argument to `expectEqual` is the known, expected, result.
 8    // The second argument is the result of some expression.
 9    // The actual's type is casted to the type of expected.
10    try std.testing.expectEqual(expected, actual);
11}
12
13test "expectError demo" {
14    const expected_error = error.DemoError;
15    const actual_error_union: anyerror!void = error.DemoError;
16
17    // `expectError` will fail when the actual error is different than
18    // the expected error.
19    try std.testing.expectError(expected_error, actual_error_union);
20}
21
22// test