[dotest] Add @skipIfCursesSupportMissing and annotate the new gui test

Summary:
The gui command requires curses support, which can be disabled at
compile time. This patch adds the ability to detect this situation in
the test suite and skip the test accordingly.

Reviewers: teemperor, jankratochvil

Subscribers: lldb-commits

Differential Revision: https://reviews.llvm.org/D67073

llvm-svn: 370658

Author: labath

lldb/packages/Python/lldbsuite/test/commands/gui/basic/TestGuiBasic.py

@@ -11,6 +11,7 @@ class BasicGuiCommandTest(PExpectTest):
 
     mydir = TestBase.compute_mydir(__file__)
 
+    @skipIfCursesSupportMissing
     def test_gui(self):
         self.build()
 

lldb/packages/Python/lldbsuite/test/commands/gui/invalid-args/TestInvalidArgsGui.py

@@ -6,10 +6,8 @@ class GuiTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    def setUp(self):
-        TestBase.setUp(self)
-
     @no_debug_info_test
+    @skipIfCursesSupportMissing
     def test_reproducer_generate_invalid_invocation(self):
         self.expect("gui blub", error=True,
                     substrs=["the gui command takes no arguments."])

lldb/packages/Python/lldbsuite/test/decorators.py

@@ -783,13 +783,18 @@ def is_compiler_with_address_sanitizer(self):
         return None
     return skipTestIfFn(is_compiler_with_address_sanitizer)(func)
 
-def skipIfXmlSupportMissing(func):
+def _get_bool_config_skip_if_decorator(key):
     config = lldb.SBDebugger.GetBuildConfiguration()
-    xml = config.GetValueForKey("xml")
-
+    value_node = config.GetValueForKey(key)
     fail_value = True # More likely to notice if something goes wrong
-    have_xml = xml.GetValueForKey("value").GetBooleanValue(fail_value)
-    return unittest2.skipIf(not have_xml, "requires xml support")(func)
+    have = value_node.GetValueForKey("value").GetBooleanValue(fail_value)
+    return unittest2.skipIf(not have, "requires " + key)
+
+def skipIfCursesSupportMissing(func):
+    return _get_bool_config_skip_if_decorator("curses")(func)
+
+def skipIfXmlSupportMissing(func):
+    return _get_bool_config_skip_if_decorator("xml")(func)
 
 def skipIfLLVMTargetMissing(target):
     config = lldb.SBDebugger.GetBuildConfiguration()

lldb/source/API/SBDebugger.cpp

@@ -624,6 +624,13 @@ SBStructuredData SBDebugger::GetBuildConfiguration() {
   AddBoolConfigEntry(
       *config_up, "xml", XMLDocument::XMLEnabled(),
       "A boolean value that indicates if XML support is enabled in LLDB");
+  bool have_curses = true;
+#ifdef LLDB_DISABLE_CURSES
+  have_curses = false;
+#endif
+  AddBoolConfigEntry(
+      *config_up, "curses", have_curses,
+      "A boolean value that indicates if curses support is enabled in LLDB");
   AddLLVMTargets(*config_up);
 
   SBStructuredData data;