heap: add test case for region overlap check condition

components/heap/heap_caps_init.c

@@ -162,6 +162,7 @@ esp_err_t heap_caps_add_region(intptr_t start, intptr_t end)
     return ESP_ERR_NOT_FOUND;
 }
 
+/* This API is used for internal test purpose and hence its not marked as static */
 bool heap_caps_check_add_region_allowed(intptr_t heap_start, intptr_t heap_end, intptr_t start, intptr_t end)
 {
     /*

components/heap/test/test_runtime_heap_reg.c

@@ -71,3 +71,20 @@ TEST_CASE("Add .bss memory to heap region runtime", "[heap][ignore]")
     /* Twice add must be failed */
     TEST_ASSERT( (heap_caps_add_region((intptr_t)s_buffer, (intptr_t)s_buffer + BUF_SZ) != ESP_OK) );
 }
+
+extern esp_err_t heap_caps_check_add_region_allowed(intptr_t heap_start, intptr_t heap_end, intptr_t start, intptr_t end);
+
+TEST_CASE("Add heap region address range checks", "[heap]")
+{
+    const intptr_t heap_start = 0x1000;
+    const intptr_t heap_end = 0x3000;
+
+    TEST_ASSERT_TRUE(heap_caps_check_add_region_allowed(heap_start, heap_end, 0x0, 0x1000));
+    TEST_ASSERT_TRUE(heap_caps_check_add_region_allowed(heap_start, heap_end, 0x1000, 0x2000));
+    TEST_ASSERT_TRUE(heap_caps_check_add_region_allowed(heap_start, heap_end, 0x1000, 0x3000));
+    TEST_ASSERT_TRUE(heap_caps_check_add_region_allowed(heap_start, heap_end, 0x3000, 0x4000));
+    TEST_ASSERT_FALSE(heap_caps_check_add_region_allowed(heap_start, heap_end, 0x0, 0x2000));
+    TEST_ASSERT_FALSE(heap_caps_check_add_region_allowed(heap_start, heap_end, 0x0, 0x4000));
+    TEST_ASSERT_FALSE(heap_caps_check_add_region_allowed(heap_start, heap_end, 0x1000, 0x4000));
+    TEST_ASSERT_FALSE(heap_caps_check_add_region_allowed(heap_start, heap_end, 0x2000, 0x4000));
+}