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Testing Environment Variable Processing in Whenever Cron Generation

This test suite validates environment variable handling in the Whenever gem’s cron job generation functionality. It ensures proper setting and formatting of environment variables when generating cron schedules, covering both standard and edge cases.

Test Coverage Overview

The test suite comprehensively covers environment variable handling in cron job generation.

Key areas tested include:

Standard environment variable assignment with string values
Email notification configuration via MAILTO
Edge cases with empty strings and nil values
Proper quoting and formatting of variable values

Implementation Analysis

The testing approach uses Ruby’s test framework with Whenever’s TestCase class as the base.

Notable patterns include:

Setup method for common test configuration
String heredoc for cron schedule definition
Assert_match for verifying output formatting
Multiple test cases covering different variable scenarios

Technical Details

Testing components include:

Whenever gem’s test framework
Ruby’s built-in test assertions
TestCase inheritance for shared functionality
Heredoc syntax for test input
Regular expression matching for output validation

Best Practices Demonstrated

The test suite exhibits several testing best practices.

Notable examples include:

Isolated test cases for each variable scenario
Clear test naming conventions
Consistent setup and teardown patterns
Comprehensive coverage of edge cases
Explicit assertion messages

javan/whenever

test/functional/output_env_test.rb

            
require 'test_helper'

class OutputEnvTest < Whenever::TestCase
  setup do
    @output = Whenever.cron \
    <<-file
      env :MYVAR, 'blah'
      env 'MAILTO', "[email protected]"
      env :BLANKVAR, ''
      env :NILVAR, nil
    file
  end

  should "output MYVAR environment variable" do
    assert_match "MYVAR=blah", @output
  end

  should "output MAILTO environment variable" do
    assert_match "[email protected]", @output
  end

  should "output BLANKVAR environment variable" do
    assert_match "BLANKVAR=\"\"", @output
  end

  should "output NILVAR environment variable" do
    assert_match "NILVAR=\"\"", @output
  end
end