Go 1.14

Welcome to the Go 1.14 Release Party!

https://www.crowdcast.io/e/pdx-go-march-12-2020

Loops

Go 1.14 comes with a change in how the runtime does preemption of Goroutines.

• Release notes are here
• Code samples are here

Tests

Go 1.14 comes with two nice additions for testing. Previously, we had to implement this stuff ourselves and it was hard.

Cleaning up

When we're writing tests, we often have to clean up after ourselves after we're done. For example, we might need to delete a database table or close a connection. Before 1.14, we had to come up with our own ways to reliably clean up. Now, Go has a native way to cleanup. The *testing.T and *testing.B types both have a Cleanup(func()) method on them.

• Release notes are here
• Code samples are here
  • Run them with go test -v cleanup_test.go

Log streaming

When we ran go test -v, Go waited until the end of the test to print all of the strings passed to t.Log.

Sometimes it's more helpful to have the output streamed as it happens. Now, if you run go test -v, each t.Log call gets flushed to STDOUT as it happens.

• Release notes are here (see the "testing" header at the bottom of the section)
• Code samples are here
  • Run them with go test -v stream_test.go

Overlapping interfaces

Before 1.14, you couldn't do this:

type Interface1 {
    Hello()
}

type Interface2 {
    Hello()
}

type Interface3 {
    Interface1
    Interface2
}

But now you can!