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Add basic test for enum defaults (#5280)

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This commit is contained in:
Vladimir Glavnyy
2019-04-09 00:21:30 +07:00
committed by Wouter van Oortmerssen
parent dd6daa709b
commit 23bb57401c
1 changed files with 28 additions and 4 deletions
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32
tests/test.cpp
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@@ -1305,15 +1305,20 @@ void ErrorTest() {
TestError("enum X:bool { Y = true }", "must be integral");
}
template<typename T> T TestValue(const char *json, const char *type_name) {
template<typename T>
T TestValue(const char *json, const char *type_name,
const char *decls = nullptr) {
flatbuffers::Parser parser;
parser.builder_.ForceDefaults(true); // return defaults
auto check_default = json ? false : true;
if (check_default) { parser.opts.output_default_scalars_in_json = true; }
// Simple schema.
std::string schema =
"table X { Y:" + std::string(type_name) + "; } root_type X;";
TEST_EQ(parser.Parse(schema.c_str()), true);
std::string schema = std::string(decls ? decls : "") + "\n" +
"table X { Y:" + std::string(type_name) +
"; } root_type X;";
auto schema_done = parser.Parse(schema.c_str());
TEST_EQ_STR(parser.error_.c_str(), "");
TEST_EQ(schema_done, true);
auto done = parser.Parse(check_default ? "{}" : json);
TEST_EQ_STR(parser.error_.c_str(), "");
@@ -1439,6 +1444,24 @@ void EnumOutOfRangeTest() {
TestError("enum X:ulong { Y = 18446744073709551615 }", "constant does not fit");
}
void EnumValueTest() {
// json: "{ Y:0 }", schema: table X { Y : "E"}
// 0 in enum (V=0) E then Y=0 is valid.
TEST_EQ(TestValue<int>("{ Y:0 }", "E", "enum E:int { V }"), 0);
TEST_EQ(TestValue<int>("{ Y:V }", "E", "enum E:int { V }"), 0);
// A default value of Y is 0.
TEST_EQ(TestValue<int>("{ }", "E", "enum E:int { V }"), 0);
TEST_EQ(TestValue<int>("{ Y:5 }", "E=V", "enum E:int { V=5 }"), 5);
// Generate json with defaults and check.
TEST_EQ(TestValue<int>(nullptr, "E=V", "enum E:int { V=5 }"), 5);
// 5 in enum
TEST_EQ(TestValue<int>("{ Y:5 }", "E", "enum E:int { Z, V=5 }"), 5);
TEST_EQ(TestValue<int>("{ Y:5 }", "E=V", "enum E:int { Z, V=5 }"), 5);
// Generate json with defaults and check.
TEST_EQ(TestValue<int>(nullptr, "E", "enum E:int { Z, V=5 }"), 0);
TEST_EQ(TestValue<int>(nullptr, "E=V", "enum E:int { Z, V=5 }"), 5);
}
void IntegerOutOfRangeTest() {
TestError("table T { F:byte; } root_type T; { F:128 }",
"constant does not fit");
@@ -2622,6 +2645,7 @@ int FlatBufferTests() {
ErrorTest();
ValueTest();
EnumValueTest();
EnumStringsTest();
EnumNamesTest();
EnumOutOfRangeTest();