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Testing Geoportail Luxembourg Geocoding Integration in alexreisner/geocoder

This test suite validates the Geoportail Luxembourg geocoding service integration in the Geocoder gem. It covers both forward and reverse geocoding functionality, along with detailed address component parsing and error handling.

Test Coverage Overview

The test suite provides comprehensive coverage of the Geoportail Luxembourg geocoding service integration. It validates:

Forward geocoding URL construction and response parsing
Reverse geocoding functionality and coordinate handling
Address component extraction (postal code, country, street, etc.)
Error cases and empty result handling

Implementation Analysis

The testing approach utilizes Ruby’s test framework with the GeocoderTestCase base class. It implements systematic validation of the geocoding service through:

Query URL construction verification
Response parsing and data mapping tests
Component-level assertion checks
Coordinate precision validation

Technical Details

Testing infrastructure includes:

Ruby test framework
GeocoderTestCase custom test class
Geocoder configuration setup
HTTP request/response simulation
Coordinate and address data fixtures

Best Practices Demonstrated

The test suite exemplifies several testing best practices:

Isolated test setup and configuration
Comprehensive component testing
Clear test case organization
Specific assertion messages
Edge case handling
DRY principle through helper methods

alexreisner/geocoder

test/unit/lookups/geoportail_lu_test.rb

            
# encoding: utf-8
require 'test_helper'

class GeoportailLuTest < GeocoderTestCase

  def setup
    super
    Geocoder.configure(lookup: :geoportail_lu)
  end

  def test_query_for_geocode
    query = Geocoder::Query.new('55 route de luxembourg, pontpierre')
    lookup = Geocoder::Lookup.get(:geoportail_lu)
    res = lookup.query_url(query)
    assert_equal 'http://api.geoportail.lu/geocoder/search?queryString=55+route+de+luxembourg%2C+pontpierre', res
  end

  def test_query_for_reverse_geocode
    query = Geocoder::Query.new([45.423733, -75.676333])
    lookup = Geocoder::Lookup.get(:geoportail_lu)
    res = lookup.query_url(query)
    assert_equal 'http://api.geoportail.lu/geocoder/reverseGeocode?lat=45.423733&lon=-75.676333', res
  end

  def test_results_component
    result = Geocoder.search('2 boulevard Royal, luxembourg').first
    assert_equal '2449', result.postal_code
    assert_equal 'Luxembourg', result.country
    assert_equal '2 Boulevard Royal,2449 Luxembourg', result.address
    assert_equal '2', result.street_number
    assert_equal 'Boulevard Royal', result.street
    assert_equal '2 Boulevard Royal', result.street_address
    assert_equal 'Luxembourg', result.city
    assert_equal 'Luxembourg', result.state
    assert_country_code result
    assert_equal(49.6146720749933, result.coordinates[0])
    assert_equal(6.12939750216249, result.coordinates[1])
  end

  def test_results_component_when_reverse_geocoding
    result = Geocoder.search([6.12476867352074, 49.6098566608772]).first
    assert_equal '1724', result.postal_code
    assert_equal 'Luxembourg', result.country
    assert_equal '39 Boulevard Prince Henri,1724 Luxembourg', result.address
    assert_equal '39', result.street_number
    assert_equal 'Boulevard Prince Henri', result.street
    assert_equal '39 Boulevard Prince Henri', result.street_address
    assert_equal 'Luxembourg', result.city
    assert_equal 'Luxembourg', result.state
    assert_country_code result
    assert_equal(49.6098566608772, result.coordinates[0])
    assert_equal(6.12476867352074, result.coordinates[1])
  end

  def test_no_results
    results = Geocoder.search('')
    assert_equal 0, results.length
  end

  private

  def assert_country_code(result)
    [:state_code, :country_code, :province_code].each do |method|
      assert_equal 'LU', result.send(method)
    end
  end
end