2 files changed, 40 insertions, 0 deletions
diff --git a/lib/python/qmk/cli/__init__.py b/lib/python/qmk/cli/__init__.py
index 4e3ce63da3..a6d53c1cb6 100644
--- a/lib/python/qmk/cli/__init__.py
+++ b/lib/python/qmk/cli/__init__.py
@@ -57,6 +57,7 @@ subcommands = [
     'qmk.cli.generate.keyboard_c',
     'qmk.cli.generate.keyboard_h',
     'qmk.cli.generate.keycodes',
+    'qmk.cli.generate.keycodes_tests',
     'qmk.cli.generate.rgb_breathe_table',
     'qmk.cli.generate.rules_mk',
     'qmk.cli.generate.version_h',
diff --git a/lib/python/qmk/cli/generate/keycodes_tests.py b/lib/python/qmk/cli/generate/keycodes_tests.py
new file mode 100644
index 0000000000..453b4693a7
--- /dev/null
+++ b/lib/python/qmk/cli/generate/keycodes_tests.py
@@ -0,0 +1,39 @@
+"""Used by the make system to generate a keycode lookup table from keycodes_{version}.json
+"""
+from milc import cli
+
+from qmk.constants import GPL2_HEADER_C_LIKE, GENERATED_HEADER_C_LIKE
+from qmk.commands import dump_lines
+from qmk.path import normpath
+from qmk.keycodes import load_spec
+
+
+def _generate_defines(lines, keycodes):
+    lines.append('')
+    lines.append('std::map<uint16_t, std::string> KEYCODE_ID_TABLE = {')
+    for key, value in keycodes["keycodes"].items():
+        lines.append(f'    {{{value.get("key")}, "{value.get("key")}"}},')
+    lines.append('};')
+
+
+@cli.argument('-v', '--version', arg_only=True, required=True, help='Version of keycodes to generate.')
+@cli.argument('-o', '--output', arg_only=True, type=normpath, help='File to write to')
+@cli.argument('-q', '--quiet', arg_only=True, action='store_true', help="Quiet mode, only output error messages")
+@cli.subcommand('Used by the make system to generate a keycode lookup table from keycodes_{version}.json', hidden=True)
+def generate_keycodes_tests(cli):
+    """Generates a keycode to identifier lookup table for unit test output.
+    """
+
+    # Build the keycodes.h file.
+    keycodes_h_lines = [GPL2_HEADER_C_LIKE, GENERATED_HEADER_C_LIKE, '// clang-format off']
+    keycodes_h_lines.append('extern "C" {\n#include <keycode.h>\n}')
+    keycodes_h_lines.append('#include <map>')
+    keycodes_h_lines.append('#include <string>')
+    keycodes_h_lines.append('#include <cstdint>')
+
+    keycodes = load_spec(cli.args.version)
+
+    _generate_defines(keycodes_h_lines, keycodes)
+
+    # Show the results
+    dump_lines(cli.args.output, keycodes_h_lines, cli.args.quiet)