Add tests for several byte-compiler warnings

* test/lisp/emacs-lisp/bytecomp-tests.el
(bytecomp/warn-autoload-not-on-top-level\.el)
(bytecomp/warn-callargs\.el)
(bytecomp/warn-defcustom-nogroup\.el)
(bytecomp/warn-defcustom-notype\.el)
(bytecomp/warn-defvar-lacks-prefix\.el)
(bytecomp/warn-format\.el)
(bytecomp/warn-lambda-malformed-interactive-spec\.el)
(bytecomp/warn-make-variable-buffer-local\.el)
(bytecomp/warn-redefine-defun-as-macro\.el)
(bytecomp/warn-redefine-defun\.el)
(bytecomp/warn-redefine-macro-as-defun\.el)
(bytecomp/warn-save-excursion\.el)
(bytecomp/warn-variable-let-bind-constant\.el)
(bytecomp/warn-variable-let-bind-nonvariable\.el)
(bytecomp/warn-variable-set-constant\.el)
(bytecomp/warn-variable-set-nonvariable\.el): New tests.
* test/lisp/emacs-lisp/bytecomp-resources/warn-autoload-not-on-top-level.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-callargs.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-defcustom-nogroup.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-defcustom-notype.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-defvar-lacks-prefix.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-format.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-lambda-malformed-interactive-spec.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-make-variable-buffer-local.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-redefine-defun-as-macro.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-redefine-defun.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-redefine-macro-as-defun.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-save-excursion.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-variable-let-bind-constant.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-variable-let-bind-nonvariable.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-variable-set-constant.el:
* test/lisp/emacs-lisp/bytecomp-resources/warn-variable-set-nonvariable.el:
* test/lisp/emacs-lisp/bytecomp-tests.el: New files.

16 files changed, 52 insertions, 0 deletions

diff --git a/test/lisp/emacs-lisp/bytecomp-resources/warn-autoload-not-on-top-level.el b/test/lisp/emacs-lisp/bytecomp-resources/warn-autoload-not-on-top-level.el
new file mode 100644
index 00000000000..f193130c6ca
--- /dev/null
+++ b/test/lisp/emacs-lisp/bytecomp-resources/warn-autoload-not-on-top-level.el
@@ -0,0 +1,3 @@
+;;; -*- lexical-binding: t -*-
+(defun foo ()
+  (autoload 'bar "baz" nil nil 'macro))
diff --git a/test/lisp/emacs-lisp/bytecomp-resources/warn-callargs.el b/test/lisp/emacs-lisp/bytecomp-resources/warn-callargs.el
new file mode 100644
index 00000000000..687add380b9
--- /dev/null
+++ b/test/lisp/emacs-lisp/bytecomp-resources/warn-callargs.el
@@ -0,0 +1,5 @@
+;;; -*- lexical-binding: t -*-
+(defun foo (_x)
+  nil)
+(defun bar ()
+  (foo 1 2))
diff --git a/test/lisp/emacs-lisp/bytecomp-resources/warn-defcustom-nogroup.el b/test/lisp/emacs-lisp/bytecomp-resources/warn-defcustom-nogroup.el
new file mode 100644
index 00000000000..a67d4f041f3
--- /dev/null
+++ b/test/lisp/emacs-lisp/bytecomp-resources/warn-defcustom-nogroup.el
@@ -0,0 +1,3 @@
+;;; -*- lexical-binding: t -*-
+(defcustom foo nil
+  :type 'boolean)
diff --git a/test/lisp/emacs-lisp/bytecomp-resources/warn-defcustom-notype.el b/test/lisp/emacs-lisp/bytecomp-resources/warn-defcustom-notype.el
new file mode 100644
index 00000000000..c15ab9b192a
--- /dev/null
+++ b/test/lisp/emacs-lisp/bytecomp-resources/warn-defcustom-notype.el
@@ -0,0 +1,3 @@
+;;; -*- lexical-binding: t -*-
+(defcustom foo nil
+  :group 'emacs)
diff --git a/test/lisp/emacs-lisp/bytecomp-resources/warn-defvar-lacks-prefix.el b/test/lisp/emacs-lisp/bytecomp-resources/warn-defvar-lacks-prefix.el
new file mode 100644
index 00000000000..9f3cbb98900
--- /dev/null
+++ b/test/lisp/emacs-lisp/bytecomp-resources/warn-defvar-lacks-prefix.el
@@ -0,0 +1,2 @@
+;;; -*- lexical-binding: t -*-
+(defvar foo nil)
diff --git a/test/lisp/emacs-lisp/bytecomp-resources/warn-format.el b/test/lisp/emacs-lisp/bytecomp-resources/warn-format.el
new file mode 100644
index 00000000000..a1902bc03b0
--- /dev/null
+++ b/test/lisp/emacs-lisp/bytecomp-resources/warn-format.el
@@ -0,0 +1,2 @@
+;;; -*- lexical-binding: t -*-
+(message "%s" 1 2)
diff --git a/test/lisp/emacs-lisp/bytecomp-resources/warn-lambda-malformed-interactive-spec.el b/test/lisp/emacs-lisp/bytecomp-resources/warn-lambda-malformed-interactive-spec.el
new file mode 100644
index 00000000000..6bd902705ed
--- /dev/null
+++ b/test/lisp/emacs-lisp/bytecomp-resources/warn-lambda-malformed-interactive-spec.el
@@ -0,0 +1,4 @@
+;;; -*- lexical-binding: t -*-
+(defun foo ()
+  (interactive "foo" "bar")
+  nil)
diff --git a/test/lisp/emacs-lisp/bytecomp-resources/warn-make-variable-buffer-local.el b/test/lisp/emacs-lisp/bytecomp-resources/warn-make-variable-buffer-local.el
new file mode 100644
index 00000000000..aa1e6c0463b
--- /dev/null
+++ b/test/lisp/emacs-lisp/bytecomp-resources/warn-make-variable-buffer-local.el
@@ -0,0 +1,4 @@
+;;; -*- lexical-binding: t -*-
+(defvar foobar)
+(defun foo ()
+  (make-variable-buffer-local 'foobar))
diff --git a/test/lisp/emacs-lisp/bytecomp-resources/warn-redefine-defun-as-macro.el b/test/lisp/emacs-lisp/bytecomp-resources/warn-redefine-defun-as-macro.el
new file mode 100644
index 00000000000..6bd239b6598
--- /dev/null
+++ b/test/lisp/emacs-lisp/bytecomp-resources/warn-redefine-defun-as-macro.el
@@ -0,0 +1,3 @@
+;;; -*- lexical-binding: t -*-
+(defun foo () nil)
+(defmacro foo () t)
diff --git a/test/lisp/emacs-lisp/bytecomp-resources/warn-redefine-defun.el b/test/lisp/emacs-lisp/bytecomp-resources/warn-redefine-defun.el
new file mode 100644
index 00000000000..53e4c0ac8de
--- /dev/null
+++ b/test/lisp/emacs-lisp/bytecomp-resources/warn-redefine-defun.el
@@ -0,0 +1,3 @@
+;;; -*- lexical-binding: t -*-
+(defun foo () nil)
+(defun foo () t)
diff --git a/test/lisp/emacs-lisp/bytecomp-resources/warn-redefine-macro-as-defun.el b/test/lisp/emacs-lisp/bytecomp-resources/warn-redefine-macro-as-defun.el
new file mode 100644
index 00000000000..f71ae445615
--- /dev/null
+++ b/test/lisp/emacs-lisp/bytecomp-resources/warn-redefine-macro-as-defun.el
@@ -0,0 +1,3 @@
+;;; -*- lexical-binding: t -*-
+(defmacro foo () t)
+(defun foo () nil)
diff --git a/test/lisp/emacs-lisp/bytecomp-resources/warn-save-excursion.el b/test/lisp/emacs-lisp/bytecomp-resources/warn-save-excursion.el
new file mode 100644
index 00000000000..38185457192
--- /dev/null
+++ b/test/lisp/emacs-lisp/bytecomp-resources/warn-save-excursion.el
@@ -0,0 +1,5 @@
+;;; -*- lexical-binding: t -*-
+(defun foo ()
+  (save-excursion
+    (set-buffer (current-buffer))
+    nil))
diff --git a/test/lisp/emacs-lisp/bytecomp-resources/warn-variable-let-bind-constant.el b/test/lisp/emacs-lisp/bytecomp-resources/warn-variable-let-bind-constant.el
new file mode 100644
index 00000000000..cc1fb572577
--- /dev/null
+++ b/test/lisp/emacs-lisp/bytecomp-resources/warn-variable-let-bind-constant.el
@@ -0,0 +1,3 @@
+;;; -*- lexical-binding: t -*-
+(defun foo ()
+  (let ((t 1)) t))
diff --git a/test/lisp/emacs-lisp/bytecomp-resources/warn-variable-let-bind-nonvariable.el b/test/lisp/emacs-lisp/bytecomp-resources/warn-variable-let-bind-nonvariable.el
new file mode 100644
index 00000000000..dde2dcee6e7
--- /dev/null
+++ b/test/lisp/emacs-lisp/bytecomp-resources/warn-variable-let-bind-nonvariable.el
@@ -0,0 +1,3 @@
+;;; -*- lexical-binding: t -*-
+(defun foo ()
+  (let (('t 1)) t))
diff --git a/test/lisp/emacs-lisp/bytecomp-resources/warn-variable-set-constant.el b/test/lisp/emacs-lisp/bytecomp-resources/warn-variable-set-constant.el
new file mode 100644
index 00000000000..2fc0680cfab
--- /dev/null
+++ b/test/lisp/emacs-lisp/bytecomp-resources/warn-variable-set-constant.el
@@ -0,0 +1,3 @@
+;;; -*- lexical-binding: t -*-
+(defun foo ()
+  (setq t nil))
diff --git a/test/lisp/emacs-lisp/bytecomp-resources/warn-variable-set-nonvariable.el b/test/lisp/emacs-lisp/bytecomp-resources/warn-variable-set-nonvariable.el
new file mode 100644
index 00000000000..0c76c4d388b
--- /dev/null
+++ b/test/lisp/emacs-lisp/bytecomp-resources/warn-variable-set-nonvariable.el
@@ -0,0 +1,3 @@
+;;; -*- lexical-binding: t -*-
+(defun foo ()
+  (set '(a) nil))