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require 'spec_helper'
require 'json'
describe "Webpack::Rails::Manifest" do
let(:manifest) do
<<-EOF
{
"errors": [],
"assetsByChunkName": {
"entry1": [ "entry1.js", "entry1-a.js" ],
"entry2": "entry2.js"
}
}
EOF
end
shared_examples_for "a valid manifest" do
it "should return single entry asset paths from the manifest" do
expect(Webpack::Rails::Manifest.asset_paths("entry2")).to eq(["/public_path/entry2.js"])
end
it "should return multiple entry asset paths from the manifest" do
expect(Webpack::Rails::Manifest.asset_paths("entry1")).to eq(["/public_path/entry1.js", "/public_path/entry1-a.js"])
end
it "should error on a missing entry point" do
expect { Webpack::Rails::Manifest.asset_paths("herp") }.to raise_error(Webpack::Rails::Manifest::EntryPointMissingError)
end
end
before do
# Test that config variables work while we're here
::Rails.configuration.webpack.dev_server.host = 'client-host'
::Rails.configuration.webpack.dev_server.port = 2000
::Rails.configuration.webpack.dev_server.manifest_host = 'server-host'
::Rails.configuration.webpack.dev_server.manifest_port = 4000
::Rails.configuration.webpack.manifest_filename = "my_manifest.json"
::Rails.configuration.webpack.public_path = "public_path"
::Rails.configuration.webpack.output_dir = "manifest_output"
end
context "with dev server enabled" do
before do
::Rails.configuration.webpack.dev_server.enabled = true
stub_request(:get, "http://server-host:4000/public_path/my_manifest.json").to_return(body: manifest, status: 200)
end
describe :asset_paths do
it_should_behave_like "a valid manifest"
it "should error if we can't find the manifest" do
::Rails.configuration.webpack.manifest_filename = "broken.json"
stub_request(:get, "http://server-host:4000/public_path/broken.json").to_raise(SocketError)
expect { Webpack::Rails::Manifest.asset_paths("entry1") }.to raise_error(Webpack::Rails::Manifest::ManifestLoadError)
end
describe "webpack errors" do
context "when webpack has 'Module build failed' errors in its manifest" do
it "should error" do
error_manifest = JSON.parse(manifest).merge("errors" => [
"somethingModule build failed something",
"I am an error"
]).to_json
stub_request(:get, "http://server-host:4000/public_path/my_manifest.json").to_return(body: error_manifest, status: 200)
expect { Webpack::Rails::Manifest.asset_paths("entry1") }.to raise_error(Webpack::Rails::Manifest::WebpackError)
end
end
context "when webpack does not have 'Module build failed' errors in its manifest" do
it "should not error" do
error_manifest = JSON.parse(manifest).merge("errors" => ["something went wrong"]).to_json
stub_request(:get, "http://server-host:4000/public_path/my_manifest.json").to_return(body: error_manifest, status: 200)
expect { Webpack::Rails::Manifest.asset_paths("entry1") }.to_not raise_error
end
end
it "should not error if errors is present but empty" do
error_manifest = JSON.parse(manifest).merge("errors" => []).to_json
stub_request(:get, "http://server-host:4000/public_path/my_manifest.json").to_return(body: error_manifest, status: 200)
expect { Webpack::Rails::Manifest.asset_paths("entry1") }.to_not raise_error
end
end
end
end
context "with dev server disabled" do
before do
::Rails.configuration.webpack.dev_server.enabled = false
allow(File).to receive(:read).with(::Rails.root.join("manifest_output/my_manifest.json")).and_return(manifest)
end
describe :asset_paths do
it_should_behave_like "a valid manifest"
it "should error if we can't find the manifest" do
::Rails.configuration.webpack.manifest_filename = "broken.json"
allow(File).to receive(:read).with(::Rails.root.join("manifest_output/broken.json")).and_raise(Errno::ENOENT)
expect { Webpack::Rails::Manifest.asset_paths("entry1") }.to raise_error(Webpack::Rails::Manifest::ManifestLoadError)
end
end
end
end
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