[Infographics & Header] Implement Unit Tests

[EhsanEhrari]

1. Header Component:

• [x] should initialize logo and websiteUrl on init
• [x] should handle branding service error
• [x] should perform candidate number or name search
• [x] should handle candidate number or name search error
• [x] should perform external ID search
• [x] should handle external ID search error
• [x] should perform email or phone search
• [x] should handle email or phone search error
• [x] should return formatted candidate row
• [x] should return logged in user info
• [x] should return true if user can view candidate name
• [x] should return false if user cannot view candidate name
• [x] should return true if user is an admin
• [x] should return false if user is not an admin
• [x] should return true if user is a system admin only
• [x] should return true if user is a system admin only

2. Info-graphic Component:

• [x] Test initialization of form group:
• [x] Create an instance of the component.
• [x] Check if the form group statsFilter is initialized correctly.
• [x] Verify that the form controls are initialized with the expected default values.
• [x] should handle error while submitting stats request
• [x] should submit stats request successfully

3. Charts Component:

• [x] Test chart rendering with different chart types:
• [x] should initialize doughnut chart correctly
• [x] provide sample data for the chart.
• [x] should initialize bar chart correctly
• [x] should not initialize chart if chartData is not provided