Test case for --dev bug

jbuilder doesn't accept --dev like it should

Signed-off-by: Rudi Grinberg <rudi.grinberg@gmail.com>

test/blackbox-tests/dune.inc

@@ -95,6 +95,14 @@
    test-cases/depend-on-the-universe
    (progn (run %{exe:cram.exe} -test run.t) (diff? run.t run.t.corrected)))))
 
+(alias
+ (name dev-flag-1103)
+ (deps (package dune) (source_tree test-cases/dev-flag-1103))
+ (action
+  (chdir
+   test-cases/dev-flag-1103
+   (progn (run %{exe:cram.exe} -test run.t) (diff? run.t run.t.corrected)))))
+
 (alias
  (name dune-jbuild-var-case)
  (deps (package dune) (source_tree test-cases/dune-jbuild-var-case))
@@ -755,6 +763,7 @@
   (alias custom-build-dir)
   (alias dep-vars)
   (alias depend-on-the-universe)
+  (alias dev-flag-1103)
   (alias dune-jbuild-var-case)
   (alias dune-ppx-driver-system)
   (alias dune-project-edition)
@@ -848,6 +857,7 @@
   (alias custom-build-dir)
   (alias dep-vars)
   (alias depend-on-the-universe)
+  (alias dev-flag-1103)
   (alias dune-jbuild-var-case)
   (alias dune-ppx-driver-system)
   (alias dune-project-edition)

test/blackbox-tests/test-cases/dev-flag-1103/run.t

@@ -0,0 +1,15 @@
+jbuilder --dev flag is accepted
+
+  $ jbuilder build --dev
+  dune: --dev is no longer accepted as it is now the default.
+  Usage: dune build [OPTION]... [TARGET]...
+  Try `dune build --help' or `dune --help' for more information.
+  [1]
+
+dune --dev flag is rejected
+
+  $ dune build --dev
+  dune: --dev is no longer accepted as it is now the default.
+  Usage: dune build [OPTION]... [TARGET]...
+  Try `dune build --help' or `dune --help' for more information.
+  [1]