Add unit tests over spawning/joining threads with thread functions

core/mbed-rtos/TESTS/mbed-rtos/threads/main.cpp

@@ -0,0 +1,110 @@
+#include "mbed.h"
+#include "test_env.h"
+#include "unity.h"
+#include "utest.h"
+#include "rtos.h"
+
+
+using namespace utest::v1;
+
+
+// Tasks with different functions to test on threads
+void increment(const void *var) {
+    (*(int *)var)++;
+}
+
+void increment_with_yield(const void *var) {
+    Thread::yield();
+    (*(int *)var)++;
+}
+
+void increment_with_wait(const void *var) {
+    Thread::wait(100);
+    (*(int *)var)++;
+}
+
+void increment_with_child(const void *var) {
+    Thread child(increment, (void*)var);
+    child.join();
+}
+
+void increment_with_murder(const void *var) {
+    Thread child(increment_with_wait, (void*)var);
+    // Kill child before it can increment var
+    child.terminate();
+    (*(int *)var)++;
+}
+
+
+// Tests that spawn tasks in different configurations
+template <void (*F)(const void *)>
+void test_single_thread() {
+    int var = 0;
+    Thread thread(F, &var);
+    thread.join();
+    TEST_ASSERT_EQUAL(var, 1);
+}
+
+template <int N, void (*F)(const void *)>
+void test_parallel_threads() {
+    int var = 0;
+    Thread *threads[N];
+
+    for (int i = 0; i < N; i++) {
+        threads[i] = new Thread(F, &var);
+    }
+
+    for (int i = 0; i < N; i++) {
+        threads[i]->join();
+        delete threads[i];
+    }
+
+    TEST_ASSERT_EQUAL(var, N);
+}
+
+template <int N, void (*F)(const void *)>
+void test_serial_threads() {
+    int var = 0;
+
+    for (int i = 0; i < N; i++) {
+        Thread thread(F, &var);
+        thread.join();
+    }
+
+    TEST_ASSERT_EQUAL(var, N);
+}
+    
+
+status_t test_setup(const size_t number_of_cases) {
+    GREENTEA_SETUP(40, "default_auto");
+    return verbose_test_setup_handler(number_of_cases);
+}
+
+// Test cases
+Case cases[] = {
+    Case("Testing single thread", test_single_thread<increment>),
+    Case("Testing parallel threads", test_parallel_threads<3, increment>),
+    Case("Testing serial threads", test_serial_threads<10, increment>),
+
+    Case("Testing single thread with yield", test_single_thread<increment_with_yield>),
+    Case("Testing parallel threads with yield", test_parallel_threads<3, increment_with_yield>),
+    Case("Testing serial threads with yield", test_serial_threads<10, increment_with_yield>),
+
+    Case("Testing single thread with wait", test_single_thread<increment_with_wait>),
+    Case("Testing parallel threads with wait", test_parallel_threads<3, increment_with_wait>),
+    Case("Testing serial threads with wait", test_serial_threads<10, increment_with_wait>),
+    
+    Case("Testing single thread with child", test_single_thread<increment_with_child>),
+    Case("Testing parallel threads with child", test_parallel_threads<3, increment_with_child>),
+    Case("Testing serial threads with child", test_serial_threads<10, increment_with_child>),
+
+    Case("Testing single thread with murder", test_single_thread<increment_with_murder>),
+    Case("Testing parallel threads with murder", test_parallel_threads<3, increment_with_murder>),
+    Case("Testing serial threads with murder", test_serial_threads<10, increment_with_murder>),
+};
+
+Specification specification(test_setup, cases);
+
+int main() {
+    return !Harness::run(specification);
+}