zircon/system/utest/fidl-compiler/enums_tests.cc

// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <unittest/unittest.h>

#include "test_library.h"

namespace {

bool GoodEnumTestSimple() {
  BEGIN_TEST;

  TestLibrary library(R"FIDL(
library example;

enum Fruit : uint64 {
    ORANGE = 1;
    APPLE = 2;
    BANANA = 3;
};
)FIDL");
  ASSERT_TRUE(library.Compile());

  END_TEST;
}

bool BadEnumTestWithNonUniqueValues() {
  BEGIN_TEST;

  TestLibrary library(R"FIDL(
library example;

enum Fruit : uint64 {
    ORANGE = 1;
    APPLE = 1;
};
)FIDL");
  ASSERT_FALSE(library.Compile());
  auto errors = library.errors();
  ASSERT_EQ(errors.size(), 1);
  ASSERT_STR_STR(errors[0].c_str(),
                 "value of member APPLE conflicts with previously declared "
                 "member ORANGE in the enum Fruit");

  END_TEST;
}

bool BadEnumTestWithNonUniqueValuesOutOfLine() {
  BEGIN_TEST;

  TestLibrary library(R"FIDL(
library example;

enum Fruit {
    ORANGE = FOUR;
    APPLE = TWO_SQUARED;
};

const uint32 FOUR = 4;
const uint32 TWO_SQUARED = 4;
)FIDL");
  ASSERT_FALSE(library.Compile());
  auto errors = library.errors();
  ASSERT_EQ(errors.size(), 1);
  ASSERT_STR_STR(errors[0].c_str(),
                 "value of member APPLE conflicts with previously declared "
                 "member ORANGE in the enum Fruit");

  END_TEST;
}

bool BadEnumTestUnsignedWithNegativeMember() {
  BEGIN_TEST;

  TestLibrary library(R"FIDL(
library example;

enum Fruit : uint64 {
    ORANGE = 1;
    APPLE = -2;
};
)FIDL");
  ASSERT_FALSE(library.Compile());
  auto errors = library.errors();
  ASSERT_GE(errors.size(), 1);
  ASSERT_STR_STR(errors[0].c_str(), "-2 cannot be interpreted as type uint64");

  END_TEST;
}

bool BadEnumTestInferredUnsignedWithNegativeMember() {
  BEGIN_TEST;

  TestLibrary library(R"FIDL(
library example;

enum Fruit {
    ORANGE = 1;
    APPLE = -2;
};
)FIDL");
  ASSERT_FALSE(library.Compile());
  auto errors = library.errors();
  ASSERT_GE(errors.size(), 1);
  ASSERT_STR_STR(errors[0].c_str(), "-2 cannot be interpreted as type uint32");

  END_TEST;
}

bool BadEnumTestMemberOverflow() {
  BEGIN_TEST;

  TestLibrary library(R"FIDL(
library example;

enum Fruit : uint8 {
    ORANGE = 1;
    APPLE = 256;
};
)FIDL");
  ASSERT_FALSE(library.Compile());
  auto errors = library.errors();
  ASSERT_GE(errors.size(), 1);
  ASSERT_STR_STR(errors[0].c_str(), "256 cannot be interpreted as type uint8");

  END_TEST;
}

bool BadEnumTestDuplicateMember() {
  BEGIN_TEST;

  TestLibrary library(R"FIDL(
library example;

enum Fruit : uint64 {
    ORANGE = 1;
    APPLE = 2;
    ORANGE = 3;
};
)FIDL");
  ASSERT_FALSE(library.Compile());
  auto errors = library.errors();
  ASSERT_GE(errors.size(), 1);
  ASSERT_STR_STR(errors[0].c_str(),
                 "name of member ORANGE conflicts with previously declared "
                 "member in the enum Fruit");

  END_TEST;
}

bool GoodEnumTestKeywordNames() {
  BEGIN_TEST;

  TestLibrary library(R"FIDL(
library example;

enum Fruit : uint64 {
    library = 1;
    enum = 2;
    uint64 = 3;
};
)FIDL");
  ASSERT_TRUE(library.Compile());

  END_TEST;
}

bool BadEnumShantBeNullable() {
  BEGIN_TEST;

  TestLibrary library(R"FIDL(
library example;

enum NotNullable {
    MEMBER = 1;
};

struct Struct {
    NotNullable? not_nullable;
};
)FIDL");
  ASSERT_FALSE(library.Compile());
  auto errors = library.errors();
  ASSERT_GE(errors.size(), 1);
  ASSERT_STR_STR(errors[0].c_str(), "example/NotNullable cannot be nullable");

  END_TEST;
}

}  // namespace

BEGIN_TEST_CASE(enums_tests)

RUN_TEST(GoodEnumTestSimple)
RUN_TEST(BadEnumTestWithNonUniqueValues)
RUN_TEST(BadEnumTestWithNonUniqueValuesOutOfLine)
RUN_TEST(BadEnumTestUnsignedWithNegativeMember)
RUN_TEST(BadEnumTestInferredUnsignedWithNegativeMember)
RUN_TEST(BadEnumTestMemberOverflow)
RUN_TEST(BadEnumTestDuplicateMember)
RUN_TEST(GoodEnumTestKeywordNames)
RUN_TEST(BadEnumShantBeNullable)

END_TEST_CASE(enums_tests)