Story: [US01] Product Search
Main Scenario:
Given I open the website
M-1. When I enter an exact model name
Then the system shows the product information
Alternative Scenario 1:
Given I open the website
A1-1. When I enter a partial model name
Then the system shows a list of products
A1-2. When I select a product
Then the system shows the product information
Exception Scenario 1:
Given I open the website
E1-1. When I search with an empty keyword
Then the system shows an error message
E1-2. When I go back to the search form
#E1-3. Go back to M-1