4 files changed, 115 insertions, 3 deletions
diff --git a/spec/frontend/snippets/components/show_spec.js b/spec/frontend/snippets/components/show_spec.js
index af61f4ea54f..c73bf8f80a2 100644
--- a/spec/frontend/snippets/components/show_spec.js
+++ b/spec/frontend/snippets/components/show_spec.js
@@ -1,4 +1,4 @@
-import { GlLoadingIcon } from '@gitlab/ui';
+import { GlLoadingIcon, GlAlert } from '@gitlab/ui';
 import { shallowMount } from '@vue/test-utils';
 import { Blob, BinaryBlob } from 'jest/blob/components/mock_data';
 import EmbedDropdown from '~/snippets/components/embed_dropdown.vue';
@@ -106,6 +106,23 @@ describe('Snippet view app', () => {
     });
   });
 
+  describe('hasUnretrievableBlobs alert rendering', () => {
+    it.each`
+      hasUnretrievableBlobs | condition       | isRendered
+      ${false}              | ${'not render'} | ${false}
+      ${true}               | ${'render'}     | ${true}
+    `('does $condition gl-alert by default', ({ hasUnretrievableBlobs, isRendered }) => {
+      createComponent({
+        data: {
+          snippet: {
+            hasUnretrievableBlobs,
+          },
+        },
+      });
+      expect(wrapper.findComponent(GlAlert).exists()).toBe(isRendered);
+    });
+  });
+
   describe('Clone button rendering', () => {
     it.each`
       httpUrlToRepo   | sshUrlToRepo   | shouldRender    | isRendered
diff --git a/spec/graphql/resolvers/snippets/blobs_resolver_spec.rb b/spec/graphql/resolvers/snippets/blobs_resolver_spec.rb
index ebe286769cf..b5db7ac5748 100644
--- a/spec/graphql/resolvers/snippets/blobs_resolver_spec.rb
+++ b/spec/graphql/resolvers/snippets/blobs_resolver_spec.rb
@@ -13,11 +13,14 @@ RSpec.describe Resolvers::Snippets::BlobsResolver do
     let_it_be(:current_user) { create(:user) }
     let_it_be(:snippet) { create(:personal_snippet, :private, :repository, author: current_user) }
 
+    let(:query_context) { {} }
+
     context 'when user is not authorized' do
       let(:other_user) { create(:user) }
 
       it 'redacts the field' do
         expect(resolve_blobs(snippet, user: other_user)).to be_nil
+        expect(query_context[:unretrievable_blobs?]).to eq(false)
       end
     end
 
@@ -28,6 +31,7 @@ RSpec.describe Resolvers::Snippets::BlobsResolver do
         expect(result).to match_array(snippet.list_files.map do |file|
           have_attributes(path: file)
         end)
+        expect(query_context[:unretrievable_blobs?]).to eq(false)
       end
     end
 
@@ -37,12 +41,14 @@ RSpec.describe Resolvers::Snippets::BlobsResolver do
           path = 'CHANGELOG'
 
           expect(resolve_blobs(snippet, paths: [path])).to contain_exactly(have_attributes(path: path))
+          expect(query_context[:unretrievable_blobs?]).to eq(false)
         end
       end
 
       context 'the argument does not match anything' do
         it 'returns an empty result' do
           expect(resolve_blobs(snippet, paths: ['does not exist'])).to be_empty
+          expect(query_context[:unretrievable_blobs?]).to eq(true)
         end
       end
 
@@ -53,12 +59,15 @@ RSpec.describe Resolvers::Snippets::BlobsResolver do
           expect(resolve_blobs(snippet, paths: paths)).to match_array(paths.map do |file|
             have_attributes(path: file)
           end)
+          expect(query_context[:unretrievable_blobs?]).to eq(false)
         end
       end
     end
   end
 
-  def resolve_blobs(snippet, user: current_user, paths: [], args: { paths: paths })
-    resolve(described_class, args: args, ctx: { current_user: user }, obj: snippet)
+  def resolve_blobs(snippet, user: current_user, paths: [], args: { paths: paths }, has_unretrievable_blobs: false)
+    query_context[:current_user] = user
+    query_context[:unretrievable_blobs?] = has_unretrievable_blobs
+    resolve(described_class, args: args, ctx: query_context, obj: snippet)
   end
 end
diff --git a/spec/lib/gitlab/email/hook/validate_addresses_interceptor_spec.rb b/spec/lib/gitlab/email/hook/validate_addresses_interceptor_spec.rb
new file mode 100644
index 00000000000..a3f0158db40
--- /dev/null
+++ b/spec/lib/gitlab/email/hook/validate_addresses_interceptor_spec.rb
@@ -0,0 +1,52 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Gitlab::Email::Hook::ValidateAddressesInterceptor do
+  describe 'UNSAFE_CHARACTERS' do
+    subject { described_class::UNSAFE_CHARACTERS }
+
+    it { is_expected.to match('\\') }
+    it { is_expected.to match("\x00") }
+    it { is_expected.to match("\x01") }
+    it { is_expected.not_to match('') }
+    it { is_expected.not_to match('user@example.com') }
+    it { is_expected.not_to match('foo-123+bar_456@example.com') }
+  end
+
+  describe '.delivering_email' do
+    let(:mail) do
+      ActionMailer::Base.mail(to: 'test@mail.com', from: 'info@mail.com', subject: 'title', body: 'hello')
+    end
+
+    let(:unsafe_email) { "evil+\x01$HOME@example.com" }
+
+    it 'sends emails to normal addresses' do
+      expect(Gitlab::AuthLogger).not_to receive(:info)
+      expect { mail.deliver_now }.to change(ActionMailer::Base.deliveries, :count)
+    end
+
+    [:from, :to, :cc, :bcc].each do |header|
+      it "does not send emails if the #{header.inspect} header contains unsafe characters" do
+        mail[header] = unsafe_email
+
+        expect(Gitlab::AuthLogger).to receive(:info).with(
+          message: 'Skipping email with unsafe characters in address',
+          address: unsafe_email,
+          subject: mail.subject
+        )
+
+        expect { mail.deliver_now }.not_to change(ActionMailer::Base.deliveries, :count)
+      end
+    end
+
+    [:reply_to].each do |header|
+      it "sends emails if the #{header.inspect} header contains unsafe characters" do
+        mail[header] = unsafe_email
+
+        expect(Gitlab::AuthLogger).not_to receive(:info)
+        expect { mail.deliver_now }.to change(ActionMailer::Base.deliveries, :count)
+      end
+    end
+  end
+end
diff --git a/spec/models/snippet_spec.rb b/spec/models/snippet_spec.rb
index 5d4a78bb15f..92e4bc7d1a9 100644
--- a/spec/models/snippet_spec.rb
+++ b/spec/models/snippet_spec.rb
@@ -3,6 +3,8 @@
 require 'spec_helper'
 
 RSpec.describe Snippet do
+  include FakeBlobHelpers
+
   describe 'modules' do
     subject { described_class }
 
@@ -526,6 +528,21 @@ RSpec.describe Snippet do
     end
   end
 
+  describe '#all_files' do
+    let(:snippet) { create(:snippet, :repository) }
+    let(:files) { double(:files) }
+
+    subject(:all_files) { snippet.all_files }
+
+    before do
+      allow(snippet.repository).to receive(:ls_files).with(snippet.default_branch).and_return(files)
+    end
+
+    it 'lists files from the repository with the default branch' do
+      expect(all_files).to eq(files)
+    end
+  end
+
   describe '#blobs' do
     context 'when repository does not exist' do
       let(:snippet) { create(:snippet) }
@@ -552,6 +569,23 @@ RSpec.describe Snippet do
         end
       end
     end
+
+    context 'when some blobs are not retrievable from repository' do
+      let(:snippet) { create(:snippet, :repository) }
+      let(:container) { double(:container) }
+      let(:retrievable_filename) { 'retrievable_file'}
+      let(:unretrievable_filename) { 'unretrievable_file'}
+
+      before do
+        allow(snippet).to receive(:list_files).and_return([retrievable_filename, unretrievable_filename])
+        blob = fake_blob(path: retrievable_filename, container: container)
+        allow(snippet.repository).to receive(:blobs_at).and_return([blob, nil])
+      end
+
+      it 'does not include unretrievable blobs' do
+        expect(snippet.blobs.map(&:name)).to contain_exactly(retrievable_filename)
+      end
+    end
   end
 
   describe '#to_json' do