public static TestmailPostcard droppedInto(Postbox postbox, MPCall<TestmailPostcard> postcardLambda) {
        TestmailPostcard postcard = new TestmailPostcard();
        postcardLambda.write(postcard);
        postbox.post(postcard);
        return postcard;
    }

    // ===================================================================================

    public static EsStatusPostcard droppedInto(Postbox postbox, MPCall<EsStatusPostcard> postcardLambda) {
        EsStatusPostcard postcard = new EsStatusPostcard();
        postcardLambda.write(postcard);
        postbox.post(postcard);
        return postcard;
    }

    // ===================================================================================

                }
                final Postbox postbox = ComponentUtil.getComponent(Postbox.class);
                try {
                    final NotificationHelper notificationHelper = ComponentUtil.getNotificationHelper();
                    SMailCallbackContext.setPreparedMessageHookOnThread(notificationHelper::send);
                    EsStatusPostcard.droppedInto(postbox, postcard -> {

            @Override
            protected SMailConventionReceptionist createConventionReceptionist() {
                return super.createConventionReceptionist().asReceiverLocale(postcard -> OptionalThing.empty());
            }

            @Override
            protected OptionalThing<SMailSubjectFilter> createSubjectFilter() {
                return OptionalThing.of((view, subject) -> subject);

			input:     []string{"Foo"},
			matches:   []string{"TestFoo", "TestMyFooBar", "TestFoo/TestBar"},
			nomatches: []string{"baz", "baz/foo", "TestBar/TestFoo"},
		},
		{
			name:      "double",
			input:     []string{"Foo/Bar"},
			matches:   []string{"TestFoo/TestBar", "TestFoo/TestBar/TestBaz"},
			nomatches: []string{"TestFoo", "TestBar", "TestMyFooBar"},
		},
		{
			name:    "space",
			input:   []string{"TestFoo/with space"},

		{"TestFoo/bar/baz", "", "", "TestFoo", true, true},
		{"TestFoo", "", "", "TestBar", false, false},
		{"TestFoo/", "", "", "TestBar", false, false},
		{"TestFoo/bar/baz", "", "", "TestBar/bar/baz", false, false},
		{"", "TestBar", "", "TestFoo", true, false},
		{"", "TestBar", "", "TestBar", false, false},

		// Skipping a non-existent test doesn't change anything.

[short] skip

cd $WORK/gopath/src/foo
go test -list=. -overlay=overlay.json .
stdout 'TestBar'

-- go.mod --
module test.pkg
-- foo/foo_test.go --
package foo

import "testing"

func TestFoo(t *testing.T) { }
-- tmp/bar_test.go --
package foo

import "testing"

func TestBar(t *testing.T) {
	t.Fatal("dummy failure")
}
-- foo/overlay.json --

import "./a"

func main() {
	a.Test1("frumious")
	a.Test2("frumious")
	a.Test3("frumious")
	a.Test4("frumious")

	a.Test5(nil)
	a.Test6(nil)
	a.Test7(nil)
	a.Test8(nil)
	a.Test9(0)

	a.TestBar()
	a.IsBaz(nil)

				nre = new(Regexp)
				*nre = *re
				nre.Rune = nil
				nre.Sub = append(nre.Sub0[:0], re.Sub[:i]...)
			}
			if nre != re {
				nre.Sub = append(nre.Sub, nsub)
			}
		}
		return nre

	case OpStar, OpPlus, OpQuest:
		sub := re.Sub[0].Simplify()
		return simplify1(re.Op, re.Flags, sub, re)

	case OpRepeat:
		// Special special case: x{0} matches the empty string
		// and doesn't even need to consider x.

}

-- $GOPATH/src/example.com/cov/withtest/withtest.go --
package withtest

func Bar() {}

-- $GOPATH/src/example.com/cov/withtest/withtest_test.go --
package withtest

import "testing"

func TestBar(t *testing.T) {
	Bar()