Can Golang test scripts issue warnings rather than errors?

I have a set of tests that may not pass due to external 3rd party issues.
I don't want the test to fail when this condition occurs but would like to be made aware.

Issuing a t.Errorf() is not idea because it will stop all subsequent tests. Is there some kind of "Warning" I can trigger that the test script would post and then continue with the remainder of the tests?

The go test tool is like the compiler. To the compiler something either compiles or doesn't, there are no warnings. I think the closest thing you're going to get is to use t.Skip. It will stop execution of the current test but does not mark it as failed. You will not see anything in the output of go test however so you have to use go test -v.

Here's an example package that uses t.Skipf if the addExternal function fails.

package app

import "testing"

func add(a, b int) int {
	return a + b
}

func addExternal(a, b int) int {
	return 4
}

func divide(a, b int) int {
	return a / b
}

func TestThing(t *testing.T) {
	got := add(1, 2)
	want := 3
	if got != want {
		t.Errorf("add(1, 2) = %d, want %d", got, want)
	}
}

func TestExternalThing(t *testing.T) {
	got := addExternal(3, 4)
	want := 7
	if got != want {
		t.Skipf("addExternal(3, 4) = %d, want %d", got, want)
	}
}

func TestAnotherThing(t *testing.T) {
	got := divide(6, 3)
	want := 2
	if got != want {
		t.Errorf("divide(6, 3) = %d, want %d", got, want)
	}
}

And here's the output from running that. Note the return status is 0 and the package is considered to have passed

$ go test -v
=== RUN   TestThing
--- PASS: TestThing (0.00s)
=== RUN   TestExternalThing
--- SKIP: TestExternalThing (0.00s)
        app_test.go:29: addExternal(3, 4) = 4, want 7
=== RUN   TestAnotherThing
--- PASS: TestAnotherThing (0.00s)
PASS
ok      github.com/jcbwlkr/app  0.006s
$ echo $?
0

Note though that if I change the t.Skipf to t.Errorf or t.Fatalf I get this output

$ go test -v
=== RUN   TestThing
--- PASS: TestThing (0.00s)
=== RUN   TestExternalThing
--- FAIL: TestExternalThing (0.00s)
        app_test.go:29: addExternal(3, 4) = 4, want 7
=== RUN   TestAnotherThing
--- PASS: TestAnotherThing (0.00s)
FAIL
exit status 1
FAIL    github.com/jcbwlkr/app  0.005s
$ echo $?
1

The other tests in the package are still ran. If I was testing multiple packages such as with go test -v ./... I believe they would also still be ran.