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|
# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Prometheus::ProxyVariableSubstitutionService do
describe '#execute' do
let_it_be(:environment) { create(:environment) }
let(:params_keys) { { query: 'up{environment="{{ci_environment_slug}}"}' } }
let(:params) { ActionController::Parameters.new(params_keys).permit! }
let(:result) { subject.execute }
subject { described_class.new(environment, params) }
shared_examples 'success' do
it 'replaces variables with values' do
expect(result[:status]).to eq(:success)
expect(result[:params][:query]).to eq(expected_query)
end
end
shared_examples 'error' do |message|
it 'returns error' do
expect(result[:status]).to eq(:error)
expect(result[:message]).to eq(message)
end
end
context 'does not alter params passed to the service' do
it do
subject.execute
expect(params).to eq(
ActionController::Parameters.new(
query: 'up{environment="{{ci_environment_slug}}"}'
).permit!
)
end
end
context 'with predefined variables' do
context 'with nil query' do
let(:params_keys) { {} }
it_behaves_like 'success' do
let(:expected_query) { nil }
end
end
context 'with liquid format' do
let(:params_keys) do
{ query: 'up{environment="{{ci_environment_slug}}"}' }
end
it_behaves_like 'success' do
let(:expected_query) { %Q[up{environment="#{environment.slug}"}] }
end
end
end
context 'with custom variables' do
let(:pod_name) { "pod1" }
let(:params_keys) do
{
query: 'up{pod_name="{{pod_name}}"}',
variables: { 'pod_name' => pod_name }
}
end
it_behaves_like 'success' do
let(:expected_query) { %q[up{pod_name="pod1"}] }
end
context 'with predefined variables in variables parameter' do
let(:params_keys) do
{
query: 'up{pod_name="{{pod_name}}",env="{{ci_environment_slug}}"}',
variables: { 'pod_name' => pod_name, 'ci_environment_slug' => 'custom_value' }
}
end
it_behaves_like 'success' do
# Predefined variable values should not be overwritten by custom variable
# values.
let(:expected_query) { "up{pod_name=\"#{pod_name}\",env=\"#{environment.slug}\"}" }
end
end
context 'with invalid variables parameter' do
let(:params_keys) do
{
query: 'up{pod_name="{{pod_name}}"}',
variables: ['a']
}
end
it_behaves_like 'error', 'Optional parameter "variables" must be a Hash. Ex: variables[key1]=value1'
end
context 'with nil variables' do
let(:params_keys) do
{
query: 'up{pod_name="{{pod_name}}"}',
variables: nil
}
end
it_behaves_like 'success' do
let(:expected_query) { 'up{pod_name="{{pod_name}}"}' }
end
end
end
context 'gsub variable substitution tolerance for weirdness' do
context 'with whitespace around variable' do
let(:params_keys) do
{
query: 'up{' \
"env1={{ ci_environment_slug}}," \
"env2={{ci_environment_slug }}," \
"{{ environment_filter }}" \
'}'
}
end
it_behaves_like 'success' do
let(:expected_query) do
'up{' \
"env1=#{environment.slug}," \
"env2=#{environment.slug}," \
"container_name!=\"POD\",environment=\"#{environment.slug}\"" \
'}'
end
end
end
context 'with empty variables' do
let(:params_keys) do
{ query: "up{env1={{}},env2={{ }}}" }
end
it_behaves_like 'success' do
let(:expected_query) { "up{env1={{}},env2={{ }}}" }
end
end
context 'with multiple occurrences of variable in string' do
let(:params_keys) do
{ query: "up{env1={{ci_environment_slug}},env2={{ci_environment_slug}}}" }
end
it_behaves_like 'success' do
let(:expected_query) { "up{env1=#{environment.slug},env2=#{environment.slug}}" }
end
end
context 'with multiple variables in string' do
let(:params_keys) do
{ query: "up{env={{ci_environment_slug}},{{environment_filter}}}" }
end
it_behaves_like 'success' do
let(:expected_query) do
"up{env=#{environment.slug}," \
"container_name!=\"POD\",environment=\"#{environment.slug}\"}"
end
end
end
context 'with unknown variables in string' do
let(:params_keys) { { query: "up{env={{env_slug}}}" } }
it_behaves_like 'success' do
let(:expected_query) { "up{env={{env_slug}}}" }
end
end
context 'with unknown and known variables in string' do
let(:params_keys) do
{ query: "up{env={{ci_environment_slug}},other_env={{env_slug}}}" }
end
it_behaves_like 'success' do
let(:expected_query) { "up{env=#{environment.slug},other_env={{env_slug}}}" }
end
end
end
context '__range' do
let(:params_keys) do
{
query: 'topk(5, sum by (method) (rate(rest_client_requests_total[{{__range}}])))',
start_time: '2020-05-29T08:19:07.142Z',
end_time: '2020-05-29T16:19:07.142Z'
}
end
it_behaves_like 'success' do
let(:expected_query) { "topk(5, sum by (method) (rate(rest_client_requests_total[#{8.hours.to_i}s])))" }
end
end
end
end
|
