Reapply "Import Dexter to debuginfo-tests""

This reverts commit cb935f345683194e42e6e883d79c5a16479acd74.

Discussion in D68708 advises that green dragon is being briskly
refurbished, and it's good to have this patch up testing it.

1 files changed, 39 insertions, 0 deletions

diff --git a/debuginfo-tests/dexter/dex/command/commands/DexWatch.py b/debuginfo-tests/dexter/dex/command/commands/DexWatch.py
new file mode 100644
index 00000000000..2dfa3a36fb3
--- /dev/null
+++ b/debuginfo-tests/dexter/dex/command/commands/DexWatch.py
@@ -0,0 +1,39 @@
+# DExTer : Debugging Experience Tester
+# ~~~~~~   ~         ~~         ~   ~~
+#
+# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+# See https://llvm.org/LICENSE.txt for license information.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+"""Command to instruct the debugger to inspect the value of some set of
+expressions on the current source line.
+"""
+
+from dex.command.CommandBase import CommandBase
+
+
+class DexWatch(CommandBase):
+    """[Deprecated] Evaluate each given `expression` when the debugger steps onto the
+    line this command is found on
+
+    DexWatch(*expressions)
+
+    See Commands.md for more info.
+    """
+
+    def __init__(self, *args):
+        if not args:
+            raise TypeError('expected some arguments')
+
+        for arg in args:
+            if not isinstance(arg, str):
+                raise TypeError('invalid argument type')
+
+        self._args = args
+        super(DexWatch, self).__init__()
+
+    @staticmethod
+    def get_name():
+        return __class__.__name__
+
+    def eval(self, debugger):
+        return {arg: debugger.evaluate_expression(arg) for arg in self._args}