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author | Sean McGivern <sean@gitlab.com> | 2017-12-11 19:34:51 +0300 |
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committer | Sean McGivern <sean@gitlab.com> | 2017-12-11 19:34:51 +0300 |
commit | 1ab33b15d1f1cc6ce69514e545da1348fd750771 (patch) | |
tree | af4dab71355a5199facc7937aeb03f964e2f6d0c /spec/rubocop/cop | |
parent | 8ff63039f1ee5f6e31a8b910e323977e7de3c634 (diff) |
Add cop for use of remove_column
remove_column should only be used in the up (or change) step of a migration if
it's a post-deployment migration. Otherwise there will be downtime due to the
ActiveRecord column cache, which we can avoid by using the IgnorableColumn
concern in combination with a post-deployment migration.
Diffstat (limited to 'spec/rubocop/cop')
-rw-r--r-- | spec/rubocop/cop/migration/remove_column_spec.rb | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/spec/rubocop/cop/migration/remove_column_spec.rb b/spec/rubocop/cop/migration/remove_column_spec.rb new file mode 100644 index 00000000000..89112f01723 --- /dev/null +++ b/spec/rubocop/cop/migration/remove_column_spec.rb @@ -0,0 +1,68 @@ +require 'spec_helper' + +require 'rubocop' +require 'rubocop/rspec/support' + +require_relative '../../../../rubocop/cop/migration/remove_column' + +describe RuboCop::Cop::Migration::RemoveColumn do + include CopHelper + + subject(:cop) { described_class.new } + + def source(meth = 'change') + "def #{meth}; remove_column :table, :column; end" + end + + context 'in a regular migration' do + before do + allow(cop).to receive(:in_migration?).and_return(true) + allow(cop).to receive(:in_post_deployment_migration?).and_return(false) + end + + it 'registers an offense when remove_column is used in the change method' do + inspect_source(cop, source('change')) + + aggregate_failures do + expect(cop.offenses.size).to eq(1) + expect(cop.offenses.map(&:line)).to eq([1]) + end + end + + it 'registers an offense when remove_column is used in the up method' do + inspect_source(cop, source('up')) + + aggregate_failures do + expect(cop.offenses.size).to eq(1) + expect(cop.offenses.map(&:line)).to eq([1]) + end + end + + it 'registers no offense when remove_column is used in the down method' do + inspect_source(cop, source('down')) + + expect(cop.offenses.size).to eq(0) + end + end + + context 'in a post-deployment migration' do + before do + allow(cop).to receive(:in_migration?).and_return(true) + allow(cop).to receive(:in_post_deployment_migration?).and_return(true) + end + + it 'registers no offense' do + inspect_source(cop, source) + + expect(cop.offenses.size).to eq(0) + end + end + + context 'outside of a migration' do + it 'registers no offense' do + inspect_source(cop, source) + + expect(cop.offenses.size).to eq(0) + end + end +end |