1 files changed, 26 insertions, 0 deletions
diff --git a/gopls/internal/lsp/analysis/infertypeargs/testdata/src/a/notypechange.go b/gopls/internal/lsp/analysis/infertypeargs/testdata/src/a/notypechange.go
new file mode 100644
index 000000000..c304f1d0d
--- /dev/null
+++ b/gopls/internal/lsp/analysis/infertypeargs/testdata/src/a/notypechange.go
@@ -0,0 +1,26 @@
+// Copyright 2021 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.
+
+// We should not suggest removing type arguments if doing so would change the
+// resulting type.
+
+package a
+
+func id[T any](t T) T { return t }
+
+var _ = id[int](1)        // want "unnecessary type arguments"
+var _ = id[string]("foo") // want "unnecessary type arguments"
+var _ = id[int64](2)
+
+func pair[T any](t T) (T, T) { return t, t }
+
+var _, _ = pair[int](3) // want "unnecessary type arguments"
+var _, _ = pair[int64](3)
+
+func noreturn[T any](t T) {}
+
+func _() {
+	noreturn[int64](4)
+	noreturn[int](4) // want "unnecessary type arguments"
+}