1 files changed, 108 insertions, 0 deletions
diff --git a/test/core/support/log_test.cc b/test/core/support/log_test.cc
new file mode 100644
index 0000000000..9602bbb090
--- /dev/null
+++ b/test/core/support/log_test.cc
@@ -0,0 +1,108 @@
+/*
+ *
+ * Copyright 2015 gRPC 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
+ *
+ *     http://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 <grpc/support/log.h>
+
+#include <stdbool.h>
+#include <string.h>
+
+#include "src/core/lib/support/env.h"
+#include "test/core/util/test_config.h"
+
+static bool log_func_reached = false;
+
+static void test_callback(gpr_log_func_args* args) {
+  GPR_ASSERT(0 == strcmp(__FILE__, args->file));
+  GPR_ASSERT(args->severity == GPR_LOG_SEVERITY_INFO);
+  GPR_ASSERT(0 == strcmp(args->message, "hello 1 2 3"));
+}
+
+static void test_should_log(gpr_log_func_args* args) {
+  log_func_reached = true;
+}
+
+static void test_should_not_log(gpr_log_func_args* args) { GPR_ASSERT(false); }
+
+#define test_log_function_reached(SEVERITY)     \
+  gpr_set_log_function(test_should_log);        \
+  log_func_reached = false;                     \
+  gpr_log_message(SEVERITY, "hello 1 2 3");     \
+  GPR_ASSERT(log_func_reached);                 \
+  log_func_reached = false;                     \
+  gpr_log(SEVERITY, "hello %d %d %d", 1, 2, 3); \
+  GPR_ASSERT(log_func_reached);
+
+#define test_log_function_unreached(SEVERITY) \
+  gpr_set_log_function(test_should_not_log);  \
+  gpr_log_message(SEVERITY, "hello 1 2 3");   \
+  gpr_log(SEVERITY, "hello %d %d %d", 1, 2, 3);
+
+int main(int argc, char** argv) {
+  grpc_test_init(argc, argv);
+  /* test logging at various verbosity levels */
+  gpr_log(GPR_DEBUG, "%s", "hello world");
+  gpr_log(GPR_INFO, "%s", "hello world");
+  gpr_log(GPR_ERROR, "%s", "hello world");
+  /* should succeed */
+  GPR_ASSERT(1);
+  gpr_set_log_function(test_callback);
+  gpr_log_message(GPR_INFO, "hello 1 2 3");
+  gpr_log(GPR_INFO, "hello %d %d %d", 1, 2, 3);
+  gpr_set_log_function(NULL);
+
+  /* gpr_log_verbosity_init() will be effective only once, and only before
+   * gpr_set_log_verbosity() is called */
+  gpr_setenv("GRPC_VERBOSITY", "ERROR");
+  gpr_log_verbosity_init();
+
+  test_log_function_reached(GPR_ERROR);
+  test_log_function_unreached(GPR_INFO);
+  test_log_function_unreached(GPR_DEBUG);
+
+  /* gpr_log_verbosity_init() should not be effective */
+  gpr_setenv("GRPC_VERBOSITY", "DEBUG");
+  gpr_log_verbosity_init();
+  test_log_function_reached(GPR_ERROR);
+  test_log_function_unreached(GPR_INFO);
+  test_log_function_unreached(GPR_DEBUG);
+
+  gpr_set_log_verbosity(GPR_LOG_SEVERITY_DEBUG);
+  test_log_function_reached(GPR_ERROR);
+  test_log_function_reached(GPR_INFO);
+  test_log_function_reached(GPR_DEBUG);
+
+  gpr_set_log_verbosity(GPR_LOG_SEVERITY_INFO);
+  test_log_function_reached(GPR_ERROR);
+  test_log_function_reached(GPR_INFO);
+  test_log_function_unreached(GPR_DEBUG);
+
+  gpr_set_log_verbosity(GPR_LOG_SEVERITY_ERROR);
+  test_log_function_reached(GPR_ERROR);
+  test_log_function_unreached(GPR_INFO);
+  test_log_function_unreached(GPR_DEBUG);
+
+  /* gpr_log_verbosity_init() should not be effective */
+  gpr_setenv("GRPC_VERBOSITY", "DEBUG");
+  gpr_log_verbosity_init();
+  test_log_function_reached(GPR_ERROR);
+  test_log_function_unreached(GPR_INFO);
+  test_log_function_unreached(GPR_DEBUG);
+
+  /* TODO(ctiller): should we add a GPR_ASSERT failure test here */
+  return 0;
+}