Back to Repositories

Testing CSS Ellipsis Text Truncation Implementation in Bourbon

This test suite validates the ellipsis mixin functionality in the Bourbon library, ensuring proper CSS text truncation behavior. The tests verify the correct application of CSS properties for text overflow handling and display characteristics.

Test Coverage Overview

The test suite provides comprehensive coverage of the ellipsis mixin implementation in Bourbon.

Key areas tested include:

Inline-block display property setting
Maximum width constraints
Overflow handling mechanisms
Text overflow ellipsis behavior
White space and word wrap settings

Implementation Analysis

The testing approach utilizes RSpec’s behavior-driven development paradigm with custom parser support for CSS rule validation. The implementation leverages context-based test organization and custom matchers for CSS ruleset verification, specifically focusing on the complete set of properties required for proper ellipsis functionality.

Technical Details

Testing infrastructure includes:

RSpec testing framework
Custom ParserSupport utility for CSS file parsing
Custom matchers for ruleset validation
Before hooks for test setup
Structured context blocks for organized test cases

Best Practices Demonstrated

The test suite exemplifies several testing best practices including isolated test setup, clear context organization, and comprehensive property validation. It demonstrates effective use of RSpec’s DSL for readable and maintainable test specifications, while ensuring all necessary CSS properties are properly set for the ellipsis functionality.

thoughtbot/bourbon

spec/bourbon/library/ellipsis_spec.rb

            
require "spec_helper"

describe "ellipsis" do
  before(:all) do
    ParserSupport.parse_file("library/ellipsis")
  end

  context "called on element" do
    it "adds ellipsis" do
      ruleset = "display: inline-block; " +
                "max-width: 100%; " +
                "overflow: hidden; " +
                "text-overflow: ellipsis; " +
                "white-space: nowrap; " +
                "word-wrap: normal;"

      expect(".ellipsis").to have_ruleset(ruleset)
    end
  end
end