148 lines
4.5 KiB
C++
148 lines
4.5 KiB
C++
/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#include <gtest/gtest.h>
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#include <react/featureflags/ReactNativeFeatureFlags.h>
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#include <react/featureflags/ReactNativeFeatureFlagsDefaults.h>
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#include <stdexcept>
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namespace facebook::react {
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uint overrideAccessCount = 0;
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class ReactNativeFeatureFlagsTestOverrides
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: public ReactNativeFeatureFlagsDefaults {
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public:
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bool commonTestFlag() override {
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overrideAccessCount++;
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return true;
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}
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};
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class ReactNativeFeatureFlagsTest : public testing::Test {
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protected:
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void SetUp() override {
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overrideAccessCount = 0;
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}
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void TearDown() override {
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ReactNativeFeatureFlags::dangerouslyReset();
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}
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};
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TEST_F(ReactNativeFeatureFlagsTest, providesDefaults) {
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EXPECT_EQ(ReactNativeFeatureFlags::commonTestFlag(), false);
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}
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TEST_F(ReactNativeFeatureFlagsTest, providesOverriddenValues) {
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ReactNativeFeatureFlags::override(
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std::make_unique<ReactNativeFeatureFlagsTestOverrides>());
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EXPECT_EQ(ReactNativeFeatureFlags::commonTestFlag(), true);
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}
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TEST_F(ReactNativeFeatureFlagsTest, preventsOverridingAfterAccess) {
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EXPECT_EQ(ReactNativeFeatureFlags::commonTestFlag(), false);
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try {
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ReactNativeFeatureFlags::override(
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std::make_unique<ReactNativeFeatureFlagsTestOverrides>());
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FAIL()
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<< "Expected ReactNativeFeatureFlags::override() to throw an exception";
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} catch (const std::runtime_error& e) {
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EXPECT_STREQ(
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"Feature flags were accessed before being overridden: commonTestFlag",
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e.what());
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}
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// Overrides shouldn't be applied after they've been accessed
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EXPECT_EQ(ReactNativeFeatureFlags::commonTestFlag(), false);
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}
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TEST_F(ReactNativeFeatureFlagsTest, preventsOverridingAfterOverride) {
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ReactNativeFeatureFlags::override(
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std::make_unique<ReactNativeFeatureFlagsTestOverrides>());
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EXPECT_EQ(ReactNativeFeatureFlags::commonTestFlag(), true);
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try {
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ReactNativeFeatureFlags::override(
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std::make_unique<ReactNativeFeatureFlagsTestOverrides>());
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FAIL()
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<< "Expected ReactNativeFeatureFlags::override() to throw an exception";
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} catch (const std::runtime_error& e) {
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EXPECT_STREQ("Feature flags cannot be overridden more than once", e.what());
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}
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// Original overrides should still work
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EXPECT_EQ(ReactNativeFeatureFlags::commonTestFlag(), true);
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}
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TEST_F(ReactNativeFeatureFlagsTest, cachesValuesFromOverride) {
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ReactNativeFeatureFlags::override(
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std::make_unique<ReactNativeFeatureFlagsTestOverrides>());
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EXPECT_EQ(overrideAccessCount, 0);
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EXPECT_EQ(ReactNativeFeatureFlags::commonTestFlag(), true);
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EXPECT_EQ(overrideAccessCount, 1);
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EXPECT_EQ(ReactNativeFeatureFlags::commonTestFlag(), true);
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EXPECT_EQ(overrideAccessCount, 1);
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}
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TEST_F(
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ReactNativeFeatureFlagsTest,
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providesDefaulValuesAgainWhenResettingAfterAnOverride) {
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ReactNativeFeatureFlags::override(
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std::make_unique<ReactNativeFeatureFlagsTestOverrides>());
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EXPECT_EQ(ReactNativeFeatureFlags::commonTestFlag(), true);
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ReactNativeFeatureFlags::dangerouslyReset();
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EXPECT_EQ(ReactNativeFeatureFlags::commonTestFlag(), false);
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}
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TEST_F(ReactNativeFeatureFlagsTest, allowsOverridingAgainAfterReset) {
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ReactNativeFeatureFlags::override(
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std::make_unique<ReactNativeFeatureFlagsTestOverrides>());
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EXPECT_EQ(ReactNativeFeatureFlags::commonTestFlag(), true);
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ReactNativeFeatureFlags::dangerouslyReset();
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ReactNativeFeatureFlags::override(
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std::make_unique<ReactNativeFeatureFlagsTestOverrides>());
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EXPECT_EQ(ReactNativeFeatureFlags::commonTestFlag(), true);
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}
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TEST_F(
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ReactNativeFeatureFlagsTest,
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allowsDangerouslyForcingOverridesWhenValuesHaveNotBeenAccessed) {
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auto accessedFlags = ReactNativeFeatureFlags::dangerouslyForceOverride(
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std::make_unique<ReactNativeFeatureFlagsTestOverrides>());
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EXPECT_EQ(ReactNativeFeatureFlags::commonTestFlag(), true);
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EXPECT_EQ(accessedFlags.has_value(), false);
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}
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TEST_F(
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ReactNativeFeatureFlagsTest,
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allowsDangerouslyForcingOverridesWhenValuesHaveBeenAccessed) {
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EXPECT_EQ(ReactNativeFeatureFlags::commonTestFlag(), false);
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auto accessedFlags = ReactNativeFeatureFlags::dangerouslyForceOverride(
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std::make_unique<ReactNativeFeatureFlagsTestOverrides>());
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EXPECT_EQ(ReactNativeFeatureFlags::commonTestFlag(), true);
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EXPECT_EQ(accessedFlags.has_value(), true);
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EXPECT_EQ(accessedFlags.value(), "commonTestFlag");
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}
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} // namespace facebook::react
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