test: add new test case for 51219 that triggers the types2 issue

The existing test for 51219 didn't actually trigger the types2 issue - I
hadn't been able to minimize the test case yet properly. This new test
case issue51219b.go now does trigger the types2 issue (it's only
slightly different).

Updates #51219

Change-Id: Iaba8144b4702ff4fefec86c899b8acef127b10dc
Reviewed-on: https://go-review.googlesource.com/c/go/+/387814
Trust: Dan Scales <danscales@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>

test/typeparam/issue51219.dir/a.go

@@ -18,42 +18,3 @@ type IConstraint interface {
 
 type I[T IConstraint] struct {
 }
-
-// The following types form an even more complex recursion (through two type
-// constraints), and model the actual types in the issue (#51219) more closely.
-// However, they don't reveal any new issue. But it seems useful to leave this
-// complex set of types in a test in case it might be broken by future changes.
-
-type Message struct {
-	Interaction *Interaction[JsonRaw] `json:"interaction,omitempty"`
-}
-
-type ResolvedDataConstraint interface {
-	User | Message
-}
-
-type Snowflake uint64
-
-type ResolvedData[T ResolvedDataConstraint] map[Snowflake]T
-
-type User struct {
-}
-
-type Resolved struct {
-	Users ResolvedData[User] `json:"users,omitempty"`
-}
-
-type resolvedInteractionWithOptions struct {
-	Resolved Resolved `json:"resolved,omitempty"`
-}
-
-type UserCommandInteractionData struct {
-	resolvedInteractionWithOptions
-}
-
-type InteractionDataConstraint interface {
-	JsonRaw | UserCommandInteractionData
-}
-
-type Interaction[DataT InteractionDataConstraint] struct {
-}

test/typeparam/issue51219.dir/main.go

@@ -6,13 +6,11 @@ package main
 
 import (
 	"a"
-	"b"
 	"fmt"
 )
 
 func main() {
 	var x a.I[a.JsonRaw]
-	var y b.InteractionRequest[a.JsonRaw]
 
-	fmt.Printf("%v %v\n", x, y)
+	fmt.Printf("%v\n", x)
 }

test/typeparam/issue51219.out

@@ -1 +1 @@
-{} {{}}
+{}

test/typeparam/issue51219b.dir/a.go

@@ -0,0 +1,37 @@
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package a
+
+type Interaction[DataT InteractionDataConstraint] struct {
+}
+
+type InteractionDataConstraint interface {
+	[]byte |
+		UserCommandInteractionData
+}
+
+type UserCommandInteractionData struct {
+	resolvedInteractionWithOptions
+}
+
+type resolvedInteractionWithOptions struct {
+	Resolved Resolved `json:"resolved,omitempty"`
+}
+
+type Resolved struct {
+	Users ResolvedData[User] `json:"users,omitempty"`
+}
+
+type ResolvedData[T ResolvedDataConstraint] map[uint64]T
+
+type ResolvedDataConstraint interface {
+	User | Message
+}
+
+type User struct{}
+
+type Message struct {
+	Interaction *Interaction[[]byte] `json:"interaction,omitempty"`
+}

test/typeparam/issue51219b.dir/b.go

@@ -4,8 +4,11 @@
 
 package b
 
-import "a"
+import (
+	"./a"
+)
 
+// InteractionRequest is an incoming request Interaction
 type InteractionRequest[T a.InteractionDataConstraint] struct {
 	a.Interaction[T]
 }

test/typeparam/issue51219b.dir/p.go

@@ -0,0 +1,14 @@
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package p
+
+import (
+	"./b"
+)
+
+// ResponseWriterMock mocks corde's ResponseWriter interface
+type ResponseWriterMock struct {
+	x b.InteractionRequest[[]byte]
+}

test/typeparam/issue51219b.go

@@ -0,0 +1,7 @@
+// compiledir -G=3
+
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ignored