Set default branch for QA tests to main

qa/qa/runtime/env.rb

@@ -57,7 +57,7 @@ module QA
       end
 
       def default_branch
-        ENV['QA_DEFAULT_BRANCH'] || 'master'
+        ENV['QA_DEFAULT_BRANCH'] || 'main'
       end
 
       def log_destination

qa/qa/specs/features/ee/browser_ui/3_create/repository/code_owners_with_protected_branch_and_squashed_commits_spec.rb

@@ -10,7 +10,7 @@ module QA
       let!(:target) do
         Resource::Repository::Commit.fabricate_via_api! do |commit|
           commit.project = project
-          commit.branch = 'master'
+          commit.branch = project.default_branch
           commit.add_files([
             { file_path: '.gitlab/CODEOWNERS', content: '* @root' }
           ])
@@ -21,7 +21,7 @@ module QA
         Resource::Repository::Commit.fabricate_via_api! do |commit|
           commit.project = project
           commit.branch = 'codeowners_test'
-          commit.start_branch = 'master'
+          commit.start_branch = project.default_branch
           commit.add_files([
             { file_path: 'test1.txt', content: '1' }
           ])
@@ -50,13 +50,13 @@ module QA
         # so we unprotect it first and then protect it again with the desired parameters
         Resource::ProtectedBranch.unprotect_via_api! do |branch|
           branch.project = project
-          branch.branch_name = 'master'
+          branch.branch_name = project.default_branch
         end
 
         Resource::ProtectedBranch.fabricate_via_api! do |branch|
           branch.project = project
           branch.new_branch = false
-          branch.branch_name = 'master'
+          branch.branch_name = project.default_branch
           branch.allowed_to_push = { roles: Resource::ProtectedBranch::Roles::NO_ONE }
           branch.allowed_to_merge = { roles: Resource::ProtectedBranch::Roles::MAINTAINERS }
           branch.require_code_owner_approval = true

qa/spec/specs/helpers/context_selector_spec.rb

@@ -189,9 +189,9 @@ RSpec.describe QA::Specs::Helpers::ContextSelector do
 
       it 'runs on default branch pipelines' do
         group = describe_successfully do
-          it('runs on master pipeline given a single pipeline', only: { pipeline: :master }) {}
-          it('runs in master given an array of pipelines', only: { pipeline: [:canary, :master] }) {}
-          it('does not run in non-default pipelines', only: { pipeline: [:nightly, :not_nightly, :not_master] }) {}
+          it('runs on main pipeline given a single pipeline', only: { pipeline: :main }) {}
+          it('runs in main given an array of pipelines', only: { pipeline: [:canary, :main] }) {}
+          it('does not run in non-default pipelines', only: { pipeline: [:nightly, :not_nightly, :not_main] }) {}
         end
 
         aggregate_failures do