1 files changed, 120 insertions, 0 deletions
diff --git a/activerecord/test/cases/readonly_test.rb b/activerecord/test/cases/readonly_test.rb
new file mode 100644
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--- /dev/null
+++ b/activerecord/test/cases/readonly_test.rb
@@ -0,0 +1,120 @@
+# frozen_string_literal: true
+
+require "cases/helper"
+require "models/author"
+require "models/post"
+require "models/comment"
+require "models/developer"
+require "models/computer"
+require "models/project"
+require "models/reader"
+require "models/person"
+require "models/ship"
+
+class ReadOnlyTest < ActiveRecord::TestCase
+  fixtures :authors, :author_addresses, :posts, :comments, :developers, :projects, :developers_projects, :people, :readers
+
+  def test_cant_save_readonly_record
+    dev = Developer.find(1)
+    assert_not_predicate dev, :readonly?
+
+    dev.readonly!
+    assert_predicate dev, :readonly?
+
+    assert_nothing_raised do
+      dev.name = "Luscious forbidden fruit."
+      assert !dev.save
+      dev.name = "Forbidden."
+    end
+
+    e = assert_raise(ActiveRecord::ReadOnlyRecord) { dev.save  }
+    assert_equal "Developer is marked as readonly", e.message
+
+    e = assert_raise(ActiveRecord::ReadOnlyRecord) { dev.save! }
+    assert_equal "Developer is marked as readonly", e.message
+
+    e = assert_raise(ActiveRecord::ReadOnlyRecord) { dev.destroy }
+    assert_equal "Developer is marked as readonly", e.message
+  end
+
+  def test_find_with_readonly_option
+    Developer.all.each { |d| assert !d.readonly? }
+    Developer.readonly(false).each { |d| assert !d.readonly? }
+    Developer.readonly(true).each { |d| assert d.readonly? }
+    Developer.readonly.each { |d| assert d.readonly? }
+  end
+
+  def test_find_with_joins_option_does_not_imply_readonly
+    Developer.joins("  ").each { |d| assert_not d.readonly? }
+    Developer.joins("  ").readonly(true).each { |d| assert d.readonly? }
+
+    Developer.joins(", projects").each { |d| assert_not d.readonly? }
+    Developer.joins(", projects").readonly(true).each { |d| assert d.readonly? }
+  end
+
+  def test_has_many_find_readonly
+    post = Post.find(1)
+    assert_not_empty post.comments
+    assert !post.comments.any?(&:readonly?)
+    assert !post.comments.to_a.any?(&:readonly?)
+    assert post.comments.readonly(true).all?(&:readonly?)
+  end
+
+  def test_has_many_with_through_is_not_implicitly_marked_readonly
+    assert people = Post.find(1).people
+    assert !people.any?(&:readonly?)
+  end
+
+  def test_has_many_with_through_is_not_implicitly_marked_readonly_while_finding_by_id
+    assert_not_predicate posts(:welcome).people.find(1), :readonly?
+  end
+
+  def test_has_many_with_through_is_not_implicitly_marked_readonly_while_finding_first
+    assert_not_predicate posts(:welcome).people.first, :readonly?
+  end
+
+  def test_has_many_with_through_is_not_implicitly_marked_readonly_while_finding_last
+    assert_not_predicate posts(:welcome).people.last, :readonly?
+  end
+
+  def test_readonly_scoping
+    Post.where("1=1").scoping do
+      assert_not_predicate Post.find(1), :readonly?
+      assert_predicate Post.readonly(true).find(1), :readonly?
+      assert_not_predicate Post.readonly(false).find(1), :readonly?
+    end
+
+    Post.joins("   ").scoping do
+      assert_not_predicate Post.find(1), :readonly?
+      assert_predicate Post.readonly.find(1), :readonly?
+      assert_not_predicate Post.readonly(false).find(1), :readonly?
+    end
+
+    # Oracle barfs on this because the join includes unqualified and
+    # conflicting column names
+    unless current_adapter?(:OracleAdapter)
+      Post.joins(", developers").scoping do
+        assert_not_predicate Post.find(1), :readonly?
+        assert_predicate Post.readonly.find(1), :readonly?
+        assert_not_predicate Post.readonly(false).find(1), :readonly?
+      end
+    end
+
+    Post.readonly(true).scoping do
+      assert_predicate Post.find(1), :readonly?
+      assert_predicate Post.readonly.find(1), :readonly?
+      assert_not_predicate Post.readonly(false).find(1), :readonly?
+    end
+  end
+
+  def test_association_collection_method_missing_scoping_not_readonly
+    developer = Developer.find(1)
+    project   = Post.find(1)
+
+    assert_not_predicate developer.projects.all_as_method.first, :readonly?
+    assert_not_predicate developer.projects.all_as_scope.first, :readonly?
+
+    assert_not_predicate project.comments.all_as_method.first, :readonly?
+    assert_not_predicate project.comments.all_as_scope.first, :readonly?
+  end
+end