94 lines
3.2 KiB
Ruby
94 lines
3.2 KiB
Ruby
# frozen_string_literal: true
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require 'spec_helper'
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RSpec.describe Gitlab::Database::SimilarityScore do
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let(:search) { '' }
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let(:query_result) { ActiveRecord::Base.connection.execute(query).to_a }
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let(:query) do
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# In memory query, with the id as the tie breaker.
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<<-SQL
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SELECT *, #{order_expression} AS similarity
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FROM (
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VALUES (1, 'Git', 'git', 'git source code mirror. this is a publish-only repository.'),
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(2, 'GitLab Runner', 'gitlab-runner', 'official helm chart for the gitlab runner'),
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(3, 'gitaly', 'gitaly', 'gitaly is a git rpc service for handling all the git calls made by gitlab'),
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(4, 'GitLab', 'gitlab', 'gitlab is an open source end-to-end software development platform with built-in version control'),
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(5, 'Gitlab Danger', 'gitlab-danger', 'this gem provides common dangerfile and plugins for gitlab projects'),
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(6, 'different', 'same', 'same'),
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(7, 'same', 'different', 'same'),
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(8, 'gitlab-styles', 'gitlab-styles', 'gitlab style guides and shared style configs.'),
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(9, '🔒 gitaly', 'gitaly-sec', 'security mirror for gitaly')
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) tbl (id, name, path, descrption) ORDER BY #{order_expression} DESC, id DESC;
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SQL
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end
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let(:order_expression) do
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Gitlab::Database::SimilarityScore.build_expression(search: search, rules: [{ column: Arel.sql('path') }]).to_sql
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end
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subject { query_result.take(3).map { |row| row['path'] } }
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context 'when passing empty values' do
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context 'when search is nil' do
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let(:search) { nil }
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it 'orders by a constant 0 value' do
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expect(query).to include('ORDER BY CAST(0 AS integer) DESC')
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end
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end
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context 'when rules are empty' do
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let(:search) { 'text' }
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let(:order_expression) do
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Gitlab::Database::SimilarityScore.build_expression(search: search, rules: []).to_sql
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end
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it 'orders by a constant 0 value' do
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expect(query).to include('ORDER BY CAST(0 AS integer) DESC')
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end
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end
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end
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context 'when similarity scoring based on the path' do
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let(:search) { 'git' }
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context 'when searching for `git`' do
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let(:search) { 'git' }
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it { expect(subject).to eq(%w[git gitlab gitaly]) }
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end
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context 'when searching for `gitlab`' do
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let(:search) { 'gitlab' }
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it { expect(subject).to eq(%w[gitlab gitlab-styles gitlab-danger]) }
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end
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context 'when searching for something unrelated' do
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let(:search) { 'xyz' }
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it 'results have 0 similarity score' do
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expect(query_result.map { |row| row['similarity'] }).to all(eq(0))
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end
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end
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end
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describe 'score multiplier' do
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let(:order_expression) do
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Gitlab::Database::SimilarityScore.build_expression(search: search, rules: [
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{ column: Arel.sql('path'), multiplier: 1 },
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{ column: Arel.sql('name'), multiplier: 0.8 }
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]).to_sql
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end
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let(:search) { 'different' }
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it 'ranks `path` matches higher' do
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expect(subject).to eq(%w[different same gitlab-danger])
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end
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end
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end
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