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diff --git a/tools/split-select/RuleGenerator_test.cpp b/tools/split-select/RuleGenerator_test.cpp
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+++ b/tools/split-select/RuleGenerator_test.cpp
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+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "RuleGenerator.h"
+
+#include "aapt/SdkConstants.h"
+#include "TestRules.h"
+
+#include <gtest/gtest.h>
+#include <utils/Vector.h>
+
+using namespace android;
+using namespace split::test;
+
+namespace split {
+
+TEST(RuleGeneratorTest, testAbiRules) {
+    Vector<abi::Variant> abis;
+    const ssize_t armeabiIndex = abis.add(abi::Variant_armeabi);
+    const ssize_t armeabi_v7aIndex = abis.add(abi::Variant_armeabi_v7a);
+    const ssize_t x86Index = abis.add(abi::Variant_x86);
+
+    EXPECT_RULES_EQ(RuleGenerator::generateAbi(abis, armeabiIndex),
+            ContainsAnyRule(Rule::NATIVE_PLATFORM, "armeabi")
+    );
+
+    EXPECT_RULES_EQ(RuleGenerator::generateAbi(abis, armeabi_v7aIndex),
+            ContainsAnyRule(Rule::NATIVE_PLATFORM, "armeabi-v7a", "arm64-v8a")
+    );
+
+    EXPECT_RULES_EQ(RuleGenerator::generateAbi(abis, x86Index),
+            ContainsAnyRule(Rule::NATIVE_PLATFORM, "x86", "x86_64")
+    );
+}
+
+TEST(RuleGeneratorTest, densityConstantsAreSane) {
+    EXPECT_LT(263, (int) ConfigDescription::DENSITY_XHIGH);
+    EXPECT_GT(262, (int) ConfigDescription::DENSITY_HIGH);
+    EXPECT_LT(363, (int) ConfigDescription::DENSITY_XXHIGH);
+    EXPECT_GT(362, (int) ConfigDescription::DENSITY_XHIGH);
+}
+
+TEST(RuleGeneratorTest, testDensityRules) {
+    Vector<int> densities;
+    const ssize_t highIndex = densities.add(ConfigDescription::DENSITY_HIGH);
+    const ssize_t xhighIndex = densities.add(ConfigDescription::DENSITY_XHIGH);
+    const ssize_t xxhighIndex = densities.add(ConfigDescription::DENSITY_XXHIGH);
+
+    EXPECT_RULES_EQ(RuleGenerator::generateDensity(densities, highIndex),
+            AndRule()
+            .add(LtRule(Rule::SCREEN_DENSITY, 263))
+    );
+
+    EXPECT_RULES_EQ(RuleGenerator::generateDensity(densities, xhighIndex),
+            AndRule()
+            .add(GtRule(Rule::SCREEN_DENSITY, 262))
+            .add(LtRule(Rule::SCREEN_DENSITY, 363))
+    );
+
+    EXPECT_RULES_EQ(RuleGenerator::generateDensity(densities, xxhighIndex),
+            AndRule()
+            .add(GtRule(Rule::SCREEN_DENSITY, 362))
+    );
+}
+
+TEST(RuleGeneratorTest, testDensityRulesWithAnyDpi) {
+    Vector<int> densities;
+    const ssize_t highIndex = densities.add(ConfigDescription::DENSITY_HIGH);
+    const ssize_t xhighIndex = densities.add(ConfigDescription::DENSITY_XHIGH);
+    const ssize_t xxhighIndex = densities.add(ConfigDescription::DENSITY_XXHIGH);
+    const ssize_t anyIndex = densities.add(ConfigDescription::DENSITY_ANY);
+
+    EXPECT_RULES_EQ(RuleGenerator::generateDensity(densities, highIndex),
+            AndRule()
+            .add(LtRule(Rule::SDK_VERSION, SDK_LOLLIPOP))
+            .add(LtRule(Rule::SCREEN_DENSITY, 263))
+    );
+
+    EXPECT_RULES_EQ(RuleGenerator::generateDensity(densities, xhighIndex),
+            AndRule()
+            .add(LtRule(Rule::SDK_VERSION, SDK_LOLLIPOP))
+            .add(GtRule(Rule::SCREEN_DENSITY, 262))
+            .add(LtRule(Rule::SCREEN_DENSITY, 363))
+    );
+
+    EXPECT_RULES_EQ(RuleGenerator::generateDensity(densities, xxhighIndex),
+            AndRule()
+            .add(LtRule(Rule::SDK_VERSION, SDK_LOLLIPOP))
+            .add(GtRule(Rule::SCREEN_DENSITY, 362))
+    );
+
+    // We expect AlwaysTrue because anydpi always has attached v21 to the configuration
+    // and the rest of the rule generation code generates the sdk version checks.
+    EXPECT_RULES_EQ(RuleGenerator::generateDensity(densities, anyIndex), AlwaysTrue());
+}
+
+} // namespace split