Shouldly in C#

Assertions that read forward and fail with the actual values.

using Shouldly;

var response = new { Status = 200, Body = "pong", Elapsed = 18 };

// Shouldly reads assertion-first and fails with the actual values
response.Status.ShouldBe(200);
response.Body.ShouldStartWith("po");
response.Elapsed.ShouldBeLessThan(100);

var tags = new[] { "fast", "green" };
tags.ShouldContain("green");
Should.Throw<FormatException>(() => int.Parse("nope"));

How it works

1. ShouldBe, ShouldStartWith and ShouldBeLessThan chain off values.
2. Collection and exception assertions follow the same shape.
3. Failure messages quote your expression, not just two values.

Keywords and builtins used here

• int
• new
• using
• var

The run, in numbers

Lines

12

Characters to type

382

Tokens

86

Three-star pace

90 tpm

At the three-star pace of 90 tokens a minute, this run takes about 57 seconds.

Type this snippet

Step 3 of 3 in Testing, step 12 of 16 in The open ecosystem.

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