cmd/go: convert TestPackageMainTestImportsArchiveNotBinary to a script test

Updates #28387
Updates #30316

Change-Id: I31e04c89f2cc226f9b5110f14c8b80a18e937efb
Reviewed-on: https://go-review.googlesource.com/c/go/+/207960
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>

src/cmd/go/go_test.go

@@ -1315,23 +1315,6 @@ func TestRelativeGOBINFail(t *testing.T) {
 	tg.grepStderr("cannot install, GOBIN must be an absolute path", "go install must fail if $GOBIN is a relative path")
 }
 
-func TestPackageMainTestImportsArchiveNotBinary(t *testing.T) {
-	tooSlow(t)
-	tg := testgo(t)
-	defer tg.cleanup()
-	tg.parallel()
-	gobin := filepath.Join(tg.pwd(), "testdata", "bin")
-	tg.creatingTemp(gobin)
-	tg.setenv("GOBIN", gobin)
-	tg.setenv("GOPATH", filepath.Join(tg.pwd(), "testdata"))
-	tg.must(os.Chtimes("./testdata/src/main_test/m.go", time.Now(), time.Now()))
-	tg.sleep()
-	tg.run("test", "main_test")
-	tg.run("install", "main_test")
-	tg.wantNotStale("main_test", "", "after go install, main listed as stale")
-	tg.run("test", "main_test")
-}
-
 func TestPackageMainTestCompilerFlags(t *testing.T) {
 	tg := testgo(t)
 	defer tg.cleanup()

src/cmd/go/testdata/script/test_main_archive.txt

@@ -0,0 +1,32 @@
+env GO111MODULE=off
+
+# Test that a main_test of 'package main' imports the package,
+# not the installed binary.
+
+[short] skip
+
+env GOBIN=$WORK/bin
+go test main_test
+go install main_test
+
+go list -f '{{.Stale}}' main_test
+stdout false
+
+go test main_test
+
+-- main_test/m.go --
+package main
+
+func F()    {}
+func main() {}
+-- main_test/m_test.go --
+package main_test
+
+import (
+	. "main_test"
+	"testing"
+)
+
+func Test1(t *testing.T) {
+	F()
+}

src/cmd/go/testdata/src/main_test/m.go

@@ -1,4 +0,0 @@
-package main
-
-func F()    {}
-func main() {}

src/cmd/go/testdata/src/main_test/m_test.go

@@ -1,10 +0,0 @@
-package main_test
-
-import (
-	. "main_test"
-	"testing"
-)
-
-func Test1(t *testing.T) {
-	F()
-}