gopls/internal/test/integration: add regtest for hover crash

This CL adds a test that confirms the bug reported in
golang/go#60592 is fixed at master; the test fails at
commit 87ad891.

Fixes golang/go#60592

Change-Id: Id9436d019a782a385228f77ce92988005711e700
Reviewed-on: https://go-review.googlesource.com/c/tools/+/557715
Reviewed-by: Robert Findley <rfindley@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Alan Donovan <adonovan@google.com>

gopls/internal/test/integration/misc/hover_test.go

@@ -491,3 +491,26 @@ func TestHoverEmbedDirective(t *testing.T) {
 		}
 	})
 }
+
+func TestHoverBrokenImport_Issue60592(t *testing.T) {
+	const files = `
+-- go.mod --
+module testdata
+go 1.18
+
+-- p.go --
+package main
+
+import foo "a"
+
+func _() {
+	foo.Print()
+}
+
+`
+	Run(t, files, func(t *testing.T, env *Env) {
+		env.OpenFile("p.go")
+		// This request should not crash gopls.
+		_, _, _ = env.Editor.Hover(env.Ctx, env.RegexpSearch("p.go", "foo[.]"))
+	})
+}