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Date:   Thu, 14 Feb 2019 13:37:22 -0800
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Subject: [RFC v4 10/17] kunit: test: add test managed resource tests
From:   Brendan Higgins <brendanhiggins@google.com>
To:     keescook@google.com, mcgrof@kernel.org, shuah@kernel.org,
        robh@kernel.org, kieran.bingham@ideasonboard.com,
        frowand.list@gmail.com
Cc:     gregkh@linuxfoundation.org, joel@jms.id.au, mpe@ellerman.id.au,
        joe@perches.com, brakmo@fb.com, rostedt@goodmis.org,
        Tim.Bird@sony.com, khilman@baylibre.com, julia.lawall@lip6.fr,
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        dan.carpenter@oracle.com, wfg@linux.intel.com,
        Brendan Higgins <brendanhiggins@google.com>,
        Avinash Kondareddy <avikr@google.com>
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Tests how tests interact with test managed resources in their lifetime.

Signed-off-by: Avinash Kondareddy <avikr@google.com>
Signed-off-by: Brendan Higgins <brendanhiggins@google.com>
---
 kunit/test-test.c | 121 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 121 insertions(+)

diff --git a/kunit/test-test.c b/kunit/test-test.c
index 0b4ad6690310d..bb34431398526 100644
--- a/kunit/test-test.c
+++ b/kunit/test-test.c
@@ -127,3 +127,124 @@ static struct kunit_module kunit_try_catch_test_module = {
 	.test_cases = kunit_try_catch_test_cases,
 };
 module_test(kunit_try_catch_test_module);
+
+/*
+ * Context for testing test managed resources
+ * is_resource_initialized is used to test arbitrary resources
+ */
+struct kunit_test_resource_context {
+	struct kunit test;
+	bool is_resource_initialized;
+};
+
+static int fake_resource_init(struct kunit_resource *res, void *context)
+{
+	struct kunit_test_resource_context *ctx = context;
+
+	res->allocation = &ctx->is_resource_initialized;
+	ctx->is_resource_initialized = true;
+	return 0;
+}
+
+static void fake_resource_free(struct kunit_resource *res)
+{
+	bool *is_resource_initialized = res->allocation;
+
+	*is_resource_initialized = false;
+}
+
+static void kunit_resource_test_init_resources(struct kunit *test)
+{
+	struct kunit_test_resource_context *ctx = test->priv;
+
+	kunit_init_test(&ctx->test, "testing_test_init_test");
+
+	KUNIT_EXPECT_TRUE(test, list_empty(&ctx->test.resources));
+}
+
+static void kunit_resource_test_alloc_resource(struct kunit *test)
+{
+	struct kunit_test_resource_context *ctx = test->priv;
+	struct kunit_resource *res;
+	kunit_resource_free_t free = fake_resource_free;
+
+	res = kunit_alloc_resource(&ctx->test,
+				   fake_resource_init,
+				   fake_resource_free,
+				   ctx);
+
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, res);
+	KUNIT_EXPECT_EQ(test, &ctx->is_resource_initialized, res->allocation);
+	KUNIT_EXPECT_TRUE(test, list_is_last(&res->node, &ctx->test.resources));
+	KUNIT_EXPECT_EQ(test, free, res->free);
+}
+
+static void kunit_resource_test_free_resource(struct kunit *test)
+{
+	struct kunit_test_resource_context *ctx = test->priv;
+	struct kunit_resource *res = kunit_alloc_resource(&ctx->test,
+							  fake_resource_init,
+							  fake_resource_free,
+							  ctx);
+
+	kunit_free_resource(&ctx->test, res);
+
+	KUNIT_EXPECT_EQ(test, false, ctx->is_resource_initialized);
+	KUNIT_EXPECT_TRUE(test, list_empty(&ctx->test.resources));
+}
+
+#define KUNIT_RESOURCE_NUM 5
+static void kunit_resource_test_cleanup_resources(struct kunit *test)
+{
+	int i;
+	struct kunit_test_resource_context *ctx = test->priv;
+	struct kunit_resource *resources[KUNIT_RESOURCE_NUM];
+
+	for (i = 0; i < KUNIT_RESOURCE_NUM; i++) {
+		resources[i] = kunit_alloc_resource(&ctx->test,
+						    fake_resource_init,
+						    fake_resource_free,
+						    ctx);
+	}
+
+	kunit_cleanup(&ctx->test);
+
+	KUNIT_EXPECT_TRUE(test, list_empty(&ctx->test.resources));
+}
+
+static int kunit_resource_test_init(struct kunit *test)
+{
+	struct kunit_test_resource_context *ctx =
+			kzalloc(sizeof(*ctx), GFP_KERNEL);
+
+	if (!ctx)
+		return -ENOMEM;
+	test->priv = ctx;
+
+	kunit_init_test(&ctx->test, "test_test_context");
+	return 0;
+}
+
+static void kunit_resource_test_exit(struct kunit *test)
+{
+	struct kunit_test_resource_context *ctx = test->priv;
+
+	kunit_cleanup(&ctx->test);
+	kfree(ctx);
+}
+
+static struct kunit_case kunit_resource_test_cases[] = {
+	KUNIT_CASE(kunit_resource_test_init_resources),
+	KUNIT_CASE(kunit_resource_test_alloc_resource),
+	KUNIT_CASE(kunit_resource_test_free_resource),
+	KUNIT_CASE(kunit_resource_test_cleanup_resources),
+	{},
+};
+
+static struct kunit_module kunit_resource_test_module = {
+	.name = "kunit-resource-test",
+	.init = kunit_resource_test_init,
+	.exit = kunit_resource_test_exit,
+	.test_cases = kunit_resource_test_cases,
+};
+module_test(kunit_resource_test_module);
-- 
2.21.0.rc0.258.g878e2cd30e-goog