ffi: use type errors for invalid signatures

Signed-off-by: HoonDongKang <d159123@naver.com>

Author: HoonDongKang

src/ffi/types.cc

@@ -107,7 +107,7 @@ Maybe<FunctionSignature> ParseFunctionSignature(Environment* env,
     }
 
     if (!return_type_val->IsString()) {
-      THROW_ERR_INVALID_ARG_VALUE(
+      THROW_ERR_INVALID_ARG_TYPE(
           env, "Return value type of function %s must be a string", name);
       return {};
     }
@@ -132,7 +132,7 @@ Maybe<FunctionSignature> ParseFunctionSignature(Environment* env,
     }
 
     if (!arguments_val->IsArray()) {
-      THROW_ERR_INVALID_ARG_VALUE(
+      THROW_ERR_INVALID_ARG_TYPE(
           env, "Arguments list of function %s must be an array", name);
       return {};
     }
@@ -148,7 +148,7 @@ Maybe<FunctionSignature> ParseFunctionSignature(Environment* env,
       }
 
       if (!arg->IsString()) {
-        THROW_ERR_INVALID_ARG_VALUE(
+        THROW_ERR_INVALID_ARG_TYPE(
             env, "Argument %u of function %s must be a string", i, name);
         return {};
       }

test/ffi/test-ffi-dynamic-library.js

@@ -432,6 +432,27 @@ test('dynamic library APIs validate failures and bad signatures', () => {
       lib.getFunction('add_i32', { return: 'i32', arguments: ['i32\0bad'] });
     }, /Argument 0 of function add_i32 must not contain null bytes/);
 
+    assert.throws(() => {
+      lib.getFunction('add_i32', { return: 1, arguments: [] });
+    }, {
+      code: 'ERR_INVALID_ARG_TYPE',
+      message: 'Return value type of function add_i32 must be a string',
+    });
+
+    assert.throws(() => {
+      lib.getFunction('add_i32', { return: 'i32', arguments: 'i32' });
+    }, {
+      code: 'ERR_INVALID_ARG_TYPE',
+      message: 'Arguments list of function add_i32 must be an array',
+    });
+
+    assert.throws(() => {
+      lib.getFunction('add_i32', { return: 'i32', arguments: [1] });
+    }, {
+      code: 'ERR_INVALID_ARG_TYPE',
+      message: 'Argument 0 of function add_i32 must be a string',
+    });
+
     assert.throws(() => {
       lib.getFunctions('not an object');
     }, {