kunit: test: add test managed resource tests

Tests how tests interact with test managed resources in their lifetime.

Change-Id: I0b18cb37d1fa5b1b378fa656f88713191e732656
Signed-off-by: Avinash Kondareddy <avikr@google.com>
Signed-off-by: Brendan Higgins <brendanhiggins@google.com>

test/Makefile

diff --git a/test/Makefile b/test/Makefile
index 4662439..84a336f 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -2,6 +2,6 @@
   test-stream.o test-executor.o
 obj-$(CONFIG_TEST_TEST)		+= \
   test-mock.o mock-macro-test.o mock-test.o string-stream-test.o \
-  test-stream-test.o
+  test-stream-test.o test-test.o
 obj-$(CONFIG_TEST_DEATH_TEST)	+= test-death-test.o
 obj-$(CONFIG_EXAMPLE_TEST)	+= example-test.o

test/test-test.c

diff --git a/test/test-test.c b/test/test-test.c
new file mode 100644
index 0000000..bec6e75
--- /dev/null
+++ b/test/test-test.c
@@ -0,0 +1,131 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * KUnit test for core test infrastructure.
+ *
+ * Copyright (C) 2018, Google LLC.
+ * Author: Brendan Higgins <brendanhiggins@google.com>
+ */
+#include <test/test.h>
+
+typedef void (*test_resource_free_t)(struct test_resource *);
+
+/*
+ * Context for testing test managed resources
+ * is_resource_initialized is used to test arbitrary resources
+ */
+struct test_test_context {
+	struct test test;
+	bool is_resource_initialized;
+};
+
+static int fake_resource_init(struct test_resource *res, void *context)
+{
+	struct test_test_context *ctx = context;
+
+	res->allocation = &ctx->is_resource_initialized;
+	ctx->is_resource_initialized = true;
+	return 0;
+}
+
+static void fake_resource_free(struct test_resource *res)
+{
+	bool *is_resource_initialized = res->allocation;
+
+	*is_resource_initialized = false;
+}
+
+static void test_test_init_resources(struct test *test)
+{
+	struct test_test_context *ctx = test->priv;
+
+	test_init_test(&ctx->test, "testing_test_init_test");
+
+	EXPECT_TRUE(test, list_empty(&ctx->test.resources));
+}
+
+static void test_test_alloc_resource(struct test *test)
+{
+	struct test_test_context *ctx = test->priv;
+	struct test_resource *res;
+
+	res = test_alloc_resource(&ctx->test,
+				   fake_resource_init,
+				   fake_resource_free,
+				   ctx);
+
+	ASSERT_NOT_ERR_OR_NULL(test, res);
+	EXPECT_EQ(test, &ctx->is_resource_initialized, res->allocation);
+	EXPECT_TRUE(test, list_is_last(&res->node, &ctx->test.resources));
+	EXPECT_EQ(test,
+		  (test_resource_free_t)fake_resource_free,
+		  (test_resource_free_t)res->free);
+}
+
+static void test_test_free_resource(struct test *test)
+{
+	struct test_test_context *ctx = test->priv;
+	struct test_resource *res = test_alloc_resource(&ctx->test,
+							  fake_resource_init,
+							  fake_resource_free,
+							  ctx);
+
+	test_free_resource(&ctx->test, res);
+
+	EXPECT_EQ(test, false, ctx->is_resource_initialized);
+	EXPECT_TRUE(test, list_empty(&ctx->test.resources));
+}
+
+static void test_test_cleanup_resources(struct test *test)
+{
+	int i;
+	const int num_res = 5;
+	struct test_test_context *ctx = test->priv;
+	struct test_resource *resources[num_res];
+
+	for (i = 0; i < num_res; i++) {
+		resources[i] = test_alloc_resource(&ctx->test,
+						    fake_resource_init,
+						    fake_resource_free,
+						    ctx);
+	}
+
+	test_cleanup(&ctx->test);
+
+	EXPECT_TRUE(test, list_empty(&ctx->test.resources));
+}
+
+static int test_test_init(struct test *test)
+{
+	struct test_test_context *ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+
+	if (!ctx)
+		return -ENOMEM;
+	test->priv = ctx;
+
+	test_init_test(&ctx->test, "test_test_context");
+	return 0;
+}
+
+static void test_test_exit(struct test *test)
+{
+	struct test_test_context *ctx = test->priv;
+
+	test_cleanup(&ctx->test);
+	kfree(ctx);
+}
+
+static struct test_case test_test_cases[] = {
+	TEST_CASE(test_test_init_resources),
+	TEST_CASE(test_test_alloc_resource),
+	TEST_CASE(test_test_free_resource),
+	TEST_CASE(test_test_cleanup_resources),
+	{},
+};
+
+static struct test_module test_test_module = {
+	.name = "test-test",
+	.init = test_test_init,
+	.exit = test_test_exit,
+	.test_cases = test_test_cases,
+};
+module_test(test_test_module);