1 files changed, 79 insertions, 0 deletions
diff --git a/spec/lib/gitlab/webpack/file_loader_spec.rb b/spec/lib/gitlab/webpack/file_loader_spec.rb
new file mode 100644
index 00000000000..34d00b9f106
--- /dev/null
+++ b/spec/lib/gitlab/webpack/file_loader_spec.rb
@@ -0,0 +1,79 @@
+# frozen_string_literal: true
+
+require 'fast_spec_helper'
+require 'support/helpers/file_read_helpers'
+require 'support/webmock'
+
+RSpec.describe Gitlab::Webpack::FileLoader do
+  include FileReadHelpers
+  include WebMock::API
+
+  let(:error_file_path) { "error.yml" }
+  let(:file_path) { "my_test_file.yml" }
+  let(:file_contents) do
+    <<-EOF
+    - hello
+    - world
+    - test
+    EOF
+  end
+
+  before do
+    allow(Gitlab.config.webpack.dev_server).to receive_messages(host: 'hostname', port: 2000, https: false)
+    allow(Gitlab.config.webpack).to receive(:public_path).and_return('public_path')
+    allow(Gitlab.config.webpack).to receive(:output_dir).and_return('webpack_output')
+  end
+
+  context "with dev server enabled" do
+    before do
+      allow(Gitlab.config.webpack.dev_server).to receive(:enabled).and_return(true)
+
+      stub_request(:get, "http://hostname:2000/public_path/not_found").to_return(status: 404)
+      stub_request(:get, "http://hostname:2000/public_path/#{file_path}").to_return(body: file_contents, status: 200)
+      stub_request(:get, "http://hostname:2000/public_path/#{error_file_path}").to_raise(StandardError)
+    end
+
+    it "returns content when respondes succesfully" do
+      expect(Gitlab::Webpack::FileLoader.load(file_path)).to be(file_contents)
+    end
+
+    it "raises error when 404" do
+      expect { Gitlab::Webpack::FileLoader.load("not_found") }.to raise_error("HTTP error 404")
+    end
+
+    it "raises error when errors out" do
+      expect { Gitlab::Webpack::FileLoader.load(error_file_path) }.to raise_error(Gitlab::Webpack::FileLoader::DevServerLoadError)
+    end
+  end
+
+  context "with dev server enabled and https" do
+    before do
+      allow(Gitlab.config.webpack.dev_server).to receive(:enabled).and_return(true)
+      allow(Gitlab.config.webpack.dev_server).to receive(:https).and_return(true)
+
+      stub_request(:get, "https://hostname:2000/public_path/#{error_file_path}").to_raise(EOFError)
+    end
+
+    it "raises error if catches SSLError" do
+      expect { Gitlab::Webpack::FileLoader.load(error_file_path) }.to raise_error(Gitlab::Webpack::FileLoader::DevServerSSLError)
+    end
+  end
+
+  context "with dev server disabled" do
+    before do
+      allow(Gitlab.config.webpack.dev_server).to receive(:enabled).and_return(false)
+      stub_file_read(::Rails.root.join("webpack_output/#{file_path}"), content: file_contents)
+      stub_file_read(::Rails.root.join("webpack_output/#{error_file_path}"), error: Errno::ENOENT)
+    end
+
+    describe ".load" do
+      it "returns file content from file path" do
+        expect(Gitlab::Webpack::FileLoader.load(file_path)).to be(file_contents)
+      end
+
+      it "throws error if file cannot be read" do
+        expect { Gitlab::Webpack::FileLoader.load(error_file_path) }.to raise_error(Gitlab::Webpack::FileLoader::StaticLoadError)
+      end
+    end
+  end
+end