1 files changed, 44 insertions, 0 deletions
diff --git a/pw_i2c_linux/initiator_test.cc b/pw_i2c_linux/initiator_test.cc
new file mode 100644
index 000000000..fe6dac260
--- /dev/null
+++ b/pw_i2c_linux/initiator_test.cc
@@ -0,0 +1,44 @@
+// Copyright 2023 The Pigweed Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not
+// use this file except in compliance with the License. You may obtain a copy of
+// the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations under
+// the License.
+
+#include "pw_i2c_linux/initiator.h"
+
+#include <type_traits>
+
+#include "gtest/gtest.h"
+#include "pw_i2c/initiator.h"
+
+namespace pw::i2c {
+namespace {
+
+// A bus path that doesn't exist. Linux only supports 255 minor numbers.
+constexpr auto kBusPathMissing = "/dev/i2c-256";
+// A bus path that points at something that is not an I2C bus.
+constexpr auto kBusPathInvalid = "/dev/null";
+
+TEST(LinuxInitiatorTest, TestOpenMissingFileFails) {
+  EXPECT_EQ(LinuxInitiator::OpenI2cBus(kBusPathMissing).status(),
+            Status::InvalidArgument());
+}
+
+TEST(LinuxInitiatorTest, TestOpenInvalidFileFails) {
+  EXPECT_EQ(LinuxInitiator::OpenI2cBus(kBusPathInvalid).status(),
+            Status::InvalidArgument());
+}
+
+// Check that LinuxInitiator implements Initiator.
+static_assert(std::is_assignable_v<Initiator&, LinuxInitiator&>);
+
+}  // namespace
+}  // namespace pw::i2c
+\ No newline at end of file