Bug 1413374 - [tryselect] Fix |mach try empty| regression and add a test, r=armenzg

MozReview-Commit-ID: Iv2RDqqhL57

--HG--
extra : rebase_source : c609fea4ff27766027fb072bd7c778f3884a1d46

tools/tryselect/selectors/empty.py

@@ -8,7 +8,7 @@ from ..cli import BaseTryParser
 from ..vcs import VCSHelper
 
 
-class SyntaxParser(BaseTryParser):
+class EmptyParser(BaseTryParser):
     name = 'empty'
     common_groups = ['push']
 

tools/tryselect/test/cram.ini

@@ -1,3 +1,4 @@
+[test_empty.t]
 [test_fuzzy.t]
 [test_message.t]
 [test_preset.t]

tools/tryselect/test/test_empty.t

@@ -0,0 +1,35 @@
+  $ . $TESTDIR/setup.sh
+  $ cd $topsrcdir
+
+Test empty selector
+
+  $ ./mach try empty --no-push
+  Commit message:
+  No try selector specified, use "Add New Jobs" to select tasks.
+  
+  Pushed via `mach try empty`
+  Calculated try_task_config.json:
+  {
+    "tasks":[]
+  }
+  
+  $ ./mach try empty --no-push --closed-tree
+  Commit message:
+  No try selector specified, use "Add New Jobs" to select tasks. ON A CLOSED TREE
+  
+  Pushed via `mach try empty`
+  Calculated try_task_config.json:
+  {
+    "tasks":[]
+  }
+  
+  $ ./mach try empty --no-push --closed-tree -m "foo {msg} bar"
+  Commit message:
+  foo No try selector specified, use "Add New Jobs" to select tasks. bar ON A CLOSED TREE
+  
+  Pushed via `mach try empty`
+  Calculated try_task_config.json:
+  {
+    "tasks":[]
+  }
+