test: Add initial common usbc ppc test

Add initial common usbc ppc tests which verify the log output from the
ppc_dump console command.

BRANCH=none
BUG=b:247854991
TEST=twister --clobber -i -s zephyr/test/drivers/drivers.usbc_ppc

Signed-off-by: Aaron Massey <aaronmassey@google.com>

Cq-Depend: chromium:3908160
Change-Id: I1fb244b0b64a4d06ff0c2ec75aebb4bf85e548f5
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3906615
Code-Coverage: Zoss <zoss-cl-coverage@prod.google.com>
Tested-by: Aaron Massey <aaronmassey@google.com>
Reviewed-by: Yuval Peress <peress@google.com>
Commit-Queue: Aaron Massey <aaronmassey@google.com>

5 files changed, 72 insertions, 0 deletions

diff --git a/zephyr/test/drivers/CMakeLists.txt b/zephyr/test/drivers/CMakeLists.txt
index ca154dba79..bad73179dc 100644
--- a/zephyr/test/drivers/CMakeLists.txt
+++ b/zephyr/test/drivers/CMakeLists.txt
@@ -59,6 +59,7 @@ add_subdirectory_ifdef(CONFIG_LINK_TEST_SUITE_USB_RETIMER_FW_UPDATE usb_retimer_
 add_subdirectory_ifdef(CONFIG_LINK_TEST_SUITE_USBC_ALT_MODE usbc_alt_mode)
 add_subdirectory_ifdef(CONFIG_LINK_TEST_SUITE_USBC_TBT_MODE usbc_tbt_mode)
 add_subdirectory_ifdef(CONFIG_LINK_TEST_SUITE_USBC_OCP usbc_ocp)
+add_subdirectory_ifdef(CONFIG_LINK_TEST_SUITE_USBC_PPC usbc_ppc)
 add_subdirectory_ifdef(CONFIG_LINK_TEST_SUITE_HOST_COMMANDS host_cmd)
 add_subdirectory_ifdef(CONFIG_LINK_TEST_SUITE_SYSTEM system)
 
diff --git a/zephyr/test/drivers/Kconfig b/zephyr/test/drivers/Kconfig
index e1c028572e..bcaec2a8f2 100644
--- a/zephyr/test/drivers/Kconfig
+++ b/zephyr/test/drivers/Kconfig
@@ -56,5 +56,7 @@ config LINK_TEST_SUITE_USBC_TBT_MODE
 config LINK_TEST_SUITE_USBC_OCP
 	bool "Link tests for common USBC OCP code"
 
+config LINK_TEST_SUITE_USBC_PPC
+	bool "Link tests for common USBC PPC code"
 
 source "Kconfig.zephyr"
diff --git a/zephyr/test/drivers/testcase.yaml b/zephyr/test/drivers/testcase.yaml
index bb76aede4f..6c16b9a0a8 100644
--- a/zephyr/test/drivers/testcase.yaml
+++ b/zephyr/test/drivers/testcase.yaml
@@ -100,3 +100,6 @@ tests:
   drivers.usbc_ocp:
     extra_configs:
       - CONFIG_LINK_TEST_SUITE_USBC_OCP=y
+  drivers.usbc_ppc:
+    extra_configs:
+      - CONFIG_LINK_TEST_SUITE_USBC_PPC=y
diff --git a/zephyr/test/drivers/usbc_ppc/CMakeLists.txt b/zephyr/test/drivers/usbc_ppc/CMakeLists.txt
new file mode 100644
index 0000000000..01d280c3ad
--- /dev/null
+++ b/zephyr/test/drivers/usbc_ppc/CMakeLists.txt
@@ -0,0 +1,6 @@
+# Copyright 2022 The ChromiumOS Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# Add source files
+target_sources(app PRIVATE src/usbc_ppc.c)
diff --git a/zephyr/test/drivers/usbc_ppc/src/usbc_ppc.c b/zephyr/test/drivers/usbc_ppc/src/usbc_ppc.c
new file mode 100644
index 0000000000..1b0383960b
--- /dev/null
+++ b/zephyr/test/drivers/usbc_ppc/src/usbc_ppc.c
@@ -0,0 +1,60 @@
+/* Copyright 2022 The ChromiumOS Authors
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <zephyr/kernel.h>
+#include <zephyr/shell/shell_dummy.h>
+#include <zephyr/ztest.h>
+#include <zephyr/ztest_assert.h>
+
+#include "console.h"
+#include "test/drivers/test_state.h"
+#include "timer.h"
+#include "usbc_ppc.h"
+
+/* Tests for USBC PPC Common Code */
+
+ZTEST(usbc_ppc, test_ppc_dump__no_args)
+{
+	const struct shell *shell_zephyr = get_ec_shell();
+
+	/* There's no output from the cmd given < 2 args */
+	zassert_equal(shell_execute_cmd(shell_zephyr, "ppc_dump"),
+		      EC_ERROR_PARAM_COUNT);
+}
+
+ZTEST(usbc_ppc, test_ppc_dump__bad_args)
+{
+	const struct shell *shell_zephyr = get_ec_shell();
+	const char *outbuffer;
+	size_t buffer_size;
+
+	shell_backend_dummy_clear_output(shell_zephyr);
+
+	zassert_equal(shell_execute_cmd(shell_zephyr, "ppc_dump -1"),
+		      EC_ERROR_INVAL);
+	outbuffer = shell_backend_dummy_get_output(shell_zephyr, &buffer_size);
+
+	zassert_true(buffer_size > 0);
+	zassert_not_null(strstr(outbuffer, "Invalid port!"));
+}
+
+ZTEST(usbc_ppc, test_ppc_dump__good_args)
+{
+	const struct shell *shell_zephyr = get_ec_shell();
+	const char *outbuffer;
+	size_t buffer_size;
+
+	shell_backend_dummy_clear_output(shell_zephyr);
+
+	zassert_ok(shell_execute_cmd(shell_zephyr, "ppc_dump 0"));
+	outbuffer = shell_backend_dummy_get_output(shell_zephyr, &buffer_size);
+
+	zassert_true(buffer_size > 0);
+
+	/* Weakly verify something reasonable was output to console */
+	zassert_not_null(strstr(outbuffer, " = 0x"));
+}
+
+ZTEST_SUITE(usbc_ppc, drivers_predicate_post_main, NULL, NULL, NULL, NULL);