go/packages: fix broken tests to handle changes to packagestest

golang.org/cl/161317 set Tests to true in the packagestest go/packages
Config. Handle this in the go/packages tests.

Fixes #30115

Change-Id: I6b4c0ca3dc2d73855239f3e7122e29da6ce81657
Reviewed-on: https://go-review.googlesource.com/c/161457
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>

go/packages/packages_test.go

@@ -99,13 +99,24 @@ func testLoadImportsGraph(t *testing.T, exporter packagestest.Exporter) {
 * golang.org/fake/c
 * golang.org/fake/e
 * golang.org/fake/subdir/d
+* golang.org/fake/subdir/d [golang.org/fake/subdir/d.test]
+* golang.org/fake/subdir/d.test
+* golang.org/fake/subdir/d_test [golang.org/fake/subdir/d.test]
+  math/bits
   unsafe
   golang.org/fake/b -> errors
   golang.org/fake/b -> golang.org/fake/a
   golang.org/fake/c -> golang.org/fake/b
   golang.org/fake/c -> unsafe
   golang.org/fake/e -> golang.org/fake/b
   golang.org/fake/e -> golang.org/fake/c
+  golang.org/fake/subdir/d [golang.org/fake/subdir/d.test] -> math/bits
+  golang.org/fake/subdir/d.test -> golang.org/fake/subdir/d [golang.org/fake/subdir/d.test]
+  golang.org/fake/subdir/d.test -> golang.org/fake/subdir/d_test [golang.org/fake/subdir/d.test]
+  golang.org/fake/subdir/d.test -> os (pruned)
+  golang.org/fake/subdir/d.test -> testing (pruned)
+  golang.org/fake/subdir/d.test -> testing/internal/testdeps (pruned)
+  golang.org/fake/subdir/d_test [golang.org/fake/subdir/d.test] -> golang.org/fake/subdir/d [golang.org/fake/subdir/d.test]
 `[1:]
 
 	if graph != wantGraph {
@@ -1268,7 +1279,10 @@ func testRedundantQueries(t *testing.T, exporter packagestest.Exporter) {
 		}}})
 	defer exported.Cleanup()
 
-	initial, err := packages.Load(exported.Config, "errors", "iamashamedtousethedisabledqueryname=errors")
+	cfg := *exported.Config
+	cfg.Tests = false
+
+	initial, err := packages.Load(&cfg, "errors", "iamashamedtousethedisabledqueryname=errors")
 	if err != nil {
 		t.Fatal(err)
 	}