discourse/spec/lib/theme_javascript_compiler_spec.rb
David Taylor 7e74dd0afe
DEV: Use DiscourseJsProcessor for theme template compilation (#18135)
Previously we were relying on a highly-customized version of the unmaintained Barber gem for theme template compilation. This commit switches us to use our own DiscourseJsProcessor, which makes use of more modern patterns and will be easier to maintain going forward.

In summary:
- Refactors DiscourseJsProcessor to move multiline JS heredocs into a companion `discourse-js-processor.js` file
- Use MiniRacer's `.call` method to avoid manually escaping JS strings
- Move Theme template AST transformers into DiscourseJsProcessor, and formalise interface for extending RawHandlebars AST transformations
- Update Ember template compilation to use a babel-based approach, just like Ember CLI. This gives each template its own ES6 module rather than directly assigning `Ember.TEMPLATES` values
- Improve testing of template compilation (and move some tests from `theme_javascript_compiler_spec.rb` to `discourse_js_processor_spec.rb`
2022-09-01 11:50:46 +01:00

76 lines
3.5 KiB
Ruby

# frozen_string_literal: true
RSpec.describe ThemeJavascriptCompiler do
let(:compiler) { ThemeJavascriptCompiler.new(1, 'marks') }
let(:theme_id) { 22 }
describe "#append_raw_template" do
it 'uses the correct template paths' do
template = "<h1>hello</h1>"
name = "/path/to/templates1"
compiler.append_raw_template("#{name}.raw", template)
expect(compiler.content.to_s).to include("addRawTemplate(\"#{name}\"")
name = "/path/to/templates2"
compiler.append_raw_template("#{name}.hbr", template)
expect(compiler.content.to_s).to include("addRawTemplate(\"#{name}\"")
name = "/path/to/templates3"
compiler.append_raw_template("#{name}.hbs", template)
expect(compiler.content.to_s).to include("addRawTemplate(\"#{name}.hbs\"")
end
end
describe "#append_ember_template" do
it 'maintains module names so that discourse-boot.js can correct them' do
compiler.append_ember_template("/connectors/blah-1", "{{var}}")
expect(compiler.content.to_s).to include("define(\"discourse/theme-1/connectors/blah-1\", [\"exports\", \"@ember/template-factory\"]")
compiler.append_ember_template("connectors/blah-2", "{{var}}")
expect(compiler.content.to_s).to include("define(\"discourse/theme-1/connectors/blah-2\", [\"exports\", \"@ember/template-factory\"]")
compiler.append_ember_template("javascripts/connectors/blah-3", "{{var}}")
expect(compiler.content.to_s).to include("define(\"discourse/theme-1/javascripts/connectors/blah-3\", [\"exports\", \"@ember/template-factory\"]")
end
end
describe "connector module name handling" do
it 'separates colocated connectors to avoid module name clash' do
# Colocated under `/connectors`
compiler = ThemeJavascriptCompiler.new(1, 'marks')
compiler.append_ember_template("connectors/outlet/blah-1", "{{var}}")
compiler.append_module("console.log('test')", "connectors/outlet/blah-1")
expect(compiler.content.to_s).to include("discourse/theme-1/connectors/outlet/blah-1")
expect(compiler.content.to_s).to include("discourse/theme-1/templates/connectors/outlet/blah-1")
# Colocated under `/templates/connectors`
compiler = ThemeJavascriptCompiler.new(1, 'marks')
compiler.append_ember_template("templates/connectors/outlet/blah-1", "{{var}}")
compiler.append_module("console.log('test')", "templates/connectors/outlet/blah-1")
expect(compiler.content.to_s).to include("discourse/theme-1/connectors/outlet/blah-1")
expect(compiler.content.to_s).to include("discourse/theme-1/templates/connectors/outlet/blah-1")
# Not colocated
compiler = ThemeJavascriptCompiler.new(1, 'marks')
compiler.append_ember_template("templates/connectors/outlet/blah-1", "{{var}}")
compiler.append_module("console.log('test')", "connectors/outlet/blah-1")
expect(compiler.content.to_s).to include("discourse/theme-1/connectors/outlet/blah-1")
expect(compiler.content.to_s).to include("discourse/theme-1/templates/connectors/outlet/blah-1")
end
end
describe "error handling" do
it "handles syntax errors in raw templates" do
expect do
compiler.append_raw_template("sometemplate.hbr", "{{invalidtemplate")
end.to raise_error(ThemeJavascriptCompiler::CompileError, /Parse error on line 1/)
end
it "handles syntax errors in ember templates" do
expect do
compiler.append_ember_template("sometemplate", "{{invalidtemplate")
end.to raise_error(ThemeJavascriptCompiler::CompileError, /Parse error on line 1/)
end
end
end