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Unit Test: Format Validation

Unit Test: Format Validation

Let’s learn to write a unit test to implement a format constraint.

We'll cover the following...

Defining the test

This unit test restricts the name field to only contain letters and spaces. To define this one, we’ll set a name containing an emoji character on the user and assert validation failure.

Here’s the test:

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context "when the name contains emojis" do
  it "the user is invalid" do
    user = User.new(name: "Hi 🤨")
    user.valid?
    expect(user.errors.messages).to include(:name)
  end
end

Add the ...