Add test

Author: kastiglione

lldb/test/API/commands/command/language/Makefile

@@ -0,0 +1,3 @@
+OBJCXX_SOURCES := main.mm
+CXX_SOURCES := lib.cpp
+include Makefile.rules

lldb/test/API/commands/command/language/TestFrameLanguageCommands.py

@@ -0,0 +1,43 @@
+import lldb
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test.decorators import *
+import lldbsuite.test.lldbutil as lldbutil
+
+
+class TestCase(TestBase):
+    def test(self):
+        self.build()
+        _, _, thread, _ = lldbutil.run_to_source_breakpoint(
+            self, "break here", lldb.SBFileSpec("lib.cpp")
+        )
+
+        frame = thread.selected_frame
+        self.assertEqual(frame.GuessLanguage(), lldb.eLanguageTypeC_plus_plus_11)
+        self.assertEqual(frame.name, "f()")
+        self.expect(
+            "help demangle",
+            substrs=[
+                "Demangle a C++ mangled name.",
+                "Syntax: language cplusplus demangle [<mangled-name> ...]",
+            ],
+        )
+        self.expect("demangle _Z1fv", startstr="_Z1fv ---> f()")
+
+        # Switch the objc caller.
+        self.runCmd("up")
+        frame = thread.selected_frame
+        self.assertEqual(frame.GuessLanguage(), lldb.eLanguageTypeObjC_plus_plus)
+        self.assertEqual(frame.name, "main")
+        self.expect("help demangle", error=True)
+        self.expect(
+            "help tagged-pointer",
+            substrs=[
+                "Commands for operating on Objective-C tagged pointers.",
+                "Syntax: class-table <subcommand> [<subcommand-options>]",
+            ],
+        )
+        self.expect(
+            "tagged-pointer info 0",
+            error=True,
+            startstr="error: could not convert '0' to a valid address",
+        )

lldb/test/API/commands/command/language/lib.cpp

@@ -0,0 +1,3 @@
+#include <stdio.h>
+extern void f();
+void f() { puts("break here"); }

lldb/test/API/commands/command/language/main.mm

@@ -0,0 +1,6 @@
+extern void f();
+
+int main() {
+  f();
+  return 0;
+}