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@aaronmcadam aaronmcadam/icon_tag.rb

Last active Aug 29, 2015
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Testing PORO view models with view_context injected
class IconTag
def initialize(helper:, icon:, project_id:, task_type:, tenant:)
@helper = helper
@icon = icon
@project_id = project_id
@task_type = task_type
@tenant = tenant
end
def tag
helper.image_tag(source, alt: description, width: "70")
end
private
attr_reader :helper, :icon, :project_id, :task_type, :tenant
def source
if icon.nil?
"kokoro/themes/#{tenant}/slices/tasks/#{task_type}.png"
else
helper.project_asset_path(project_id, icon)
end
end
def description
if icon.nil?
"#{task_type.capitalize} Task"
else
File.basename(icon, File.extname(icon)).titleize
end
end
end
class TaskDecorator < SimpleDelegator
def initialize(task:, view_context:)
super(task)
@view_context = view_context
end
def icon_tag
IconTag.new(
helper: view_context,
icon: icon,
project_id: project_id,
task_type: type,
tenant: view_context.tenant_name
).tag
end
end
RSpec.describe TaskDecorator do
describe "#icon_tag" do
context "with no icon set" do
it "returns an image element for the given Task type" do
task = double("task", icon: nil, type: "survey")
view_context = double(
"view_context",
tenant_name: "crowdlab",
params: {},
image_tag: nil
)
decorator = create_decorator(task: task, view_context: view_context)
decorator.icon_tag
expected_source = "kokoro/themes/crowdlab/slices/tasks/survey.png"
expect(view_context)
.to have_received(:image_tag)
.with(expected_source, alt: "Survey Task", width: "70")
end
end
context "with an icon set" do
it "returns an image element" do
icon = "task_icon.png"
task = double("task", icon: icon, type: "survey")
project_id = "1"
expected_source = "/projects/1/assets/#{icon}"
view_context = double(
"view_context",
tenant_name: "crowdlab",
params: { project_id: project_id },
image_tag: nil,
project_asset_path: expected_source
)
decorator = create_decorator(task: task, view_context: view_context)
decorator.icon_tag
# Example using Capybara to integration test instead:
# markup = Capybara.string(decorator.icon_tag)
# expect(markup).to have_css("img[alt='Task Icon']")
# expect(markup).to have_css("img[width='70']")
# expect(markup).to have_css("img[src='#{expected_source}']")
expect(view_context)
.to have_received(:image_tag)
.with(expected_source, alt: "Task Icon", width: "70")
expect(view_context)
.to have_received(:project_asset_path)
.with(project_id, icon)
end
end
end
end
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