Not everyone needs to be tested says the CDC (Centers for Disease Control and Prevention) for COVID-19. Here is some information that might help in making decisions about seeking care or testing.
Most people have mild illness and are able to recover at home.
There is no treatment specifically approved for this virus.
Testing results may be helpful to inform decision-making about who you come in contact with.
A very good explanation of testing is provided here, it shows that testing is important especially for the future and to know all the details about this pandemic and future treatments and precautions.
A specific graphic about the "Total tests for COVID-19 per 1,000 people" for India, Italy, South Korea, Turkey, the USA, France, The Netherlands and the UK to show the amount of tests performed