Add unit tests for "evmc_create()"

test/unittests/CMakeLists.txt

@@ -5,6 +5,10 @@
 add_library(vm-mock SHARED vm_mock.c)
 target_link_libraries(vm-mock PRIVATE evmc)
 
+add_library(vm-mock-default SHARED vm_mock_default.c)
+target_link_libraries(vm-mock-default PRIVATE evmc)
+
+
 if(UNIX)
     set(cmd create_symlink)
 else()
@@ -13,6 +17,7 @@ endif()
 
 add_custom_command(
     TARGET vm-mock POST_BUILD
+
     COMMAND ${CMAKE_COMMAND} -E ${cmd} $<TARGET_FILE:vm-mock> libaaa.so
     COMMAND ${CMAKE_COMMAND} -E ${cmd} $<TARGET_FILE:vm-mock> double_prefix_aaa.evm
     COMMAND ${CMAKE_COMMAND} -E ${cmd} $<TARGET_FILE:vm-mock> double-prefix-aaa.evm
@@ -26,6 +31,9 @@ add_custom_command(
     COMMAND ${CMAKE_COMMAND} -E ${cmd} $<TARGET_FILE:vm-mock> ../aaa.evm
     COMMAND ${CMAKE_COMMAND} -E ${cmd} $<TARGET_FILE:vm-mock> failure.vm
     COMMAND ${CMAKE_COMMAND} -E ${cmd} $<TARGET_FILE:vm-mock> abi42.vm
+
+    COMMAND ${CMAKE_COMMAND} -E ${cmd} $<TARGET_FILE:vm-mock-default> default.evmc
+
     COMMAND ${CMAKE_COMMAND} -E touch empty.file
 )
 

test/unittests/test_loader.cpp

@@ -245,6 +245,19 @@ TEST(loader, lib_)
     EXPECT_EQ(x, nullptr);
 }
 
+TEST(loader, load_default)
+{
+    auto path = "unittests/default.evmc";
+
+    evmc_loader_error_code ec;
+    auto fn = evmc_load(path, &ec);
+    EXPECT_EQ(ec, EVMC_LOADER_SUCCESS);
+    EXPECT_EQ((uintptr_t)fn(), 0xdeaf);
+
+    fn = evmc_load(path, nullptr);
+    EXPECT_EQ((uintptr_t)fn(), 0xdeaf);
+}
+
 TEST(loader, load_and_create_failure)
 {
     evmc_loader_error_code ec;

test/unittests/vm_mock_default.c

@@ -0,0 +1,11 @@
+/* EVMC: Ethereum Client-VM Connector API.
+ * Copyright 2018 The EVMC Authors.
+ * Licensed under the Apache License, Version 2.0. See the LICENSE file.
+ */
+
+#include <evmc/utils.h>
+
+EVMC_EXPORT void* evmc_create()
+{
+    return (void*)0xdeaf;
+}