src/test/java/com/android/tools/r8/naming/MinificationMixedCaseAndNumbersTest.java

// Copyright (c) 2019, the R8 project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

package com.android.tools.r8.naming;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

import com.android.tools.r8.CompilationFailedException;
import com.android.tools.r8.TestBase;
import com.android.tools.r8.TestParameters;
import com.android.tools.r8.TestParametersCollection;
import com.android.tools.r8.utils.SymbolGenerationUtils;
import com.android.tools.r8.utils.SymbolGenerationUtils.MixedCasing;
import com.android.tools.r8.utils.codeinspector.FoundClassSubject;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.concurrent.ExecutionException;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;

@RunWith(Parameterized.class)
public class MinificationMixedCaseAndNumbersTest extends TestBase {

  private static final int NUMBER_OF_MINIFIED_CLASSES = 60;

  private final TestParameters parameters;

  @Parameterized.Parameters(name = "{0}")
  public static TestParametersCollection data() {
    return getTestParameters().withAllRuntimes().build();
  }

  public MinificationMixedCaseAndNumbersTest(TestParameters parameters) {
    this.parameters = parameters;
  }

  @Test
  public void testNaming() throws ExecutionException, CompilationFailedException, IOException {
    Set<String> allowedNames = new HashSet<>();
    allowedNames.add("com.android.tools.r8.naming.MinificationMixedCaseAndNumbersTest$Main");
    for (int i = 1; i < NUMBER_OF_MINIFIED_CLASSES; i++) {
      String newString =
          SymbolGenerationUtils.numberToIdentifier(i, MixedCasing.DONT_USE_MIXED_CASE);
      assertFalse(Character.isDigit(newString.charAt(0)));
      allowedNames.add("com.android.tools.r8.naming." + newString);
    }
    testForR8(parameters.getBackend())
        .addInnerClasses(MinificationMixedCaseAndNumbersTest.class)
        .addKeepMainRule(Main.class)
        .noTreeShaking()
        .addKeepRules("-dontusemixedcaseclassnames")
        .setMinApi(parameters.getRuntime())
        .run(parameters.getRuntime(), Main.class)
        .inspect(
            inspector -> {
              List<FoundClassSubject> foundClassSubjects = new ArrayList<>(inspector.allClasses());
              foundClassSubjects.forEach(
                  foundClazz -> {
                    assertTrue(allowedNames.contains(foundClazz.getFinalName()));
                    allowedNames.remove(foundClazz.getFinalName());
                  });
            });
    // The first identifier to use a number is 27 for MixedCasing.DONT_USE_MIXED_CASE.
    assertTrue(allowedNames.isEmpty());
    assertEquals(
        "a0", SymbolGenerationUtils.numberToIdentifier(27, MixedCasing.DONT_USE_MIXED_CASE));
    assertEquals(
        "zz", SymbolGenerationUtils.numberToIdentifier(962, MixedCasing.DONT_USE_MIXED_CASE));
    assertEquals(
        "a00", SymbolGenerationUtils.numberToIdentifier(963, MixedCasing.DONT_USE_MIXED_CASE));
  }

  public static class A {}

  public static class B {}

  public static class C {}

  public static class D {}

  public static class E {}

  public static class F {}

  public static class G {}

  public static class H {}

  public static class I {}

  public static class J {}

  public static class K {}

  public static class L {}

  public static class M {}

  public static class N {}

  public static class O {}

  public static class P {}

  public static class Q {}

  public static class R {}

  public static class S {}

  public static class T {}

  public static class U {}

  public static class V {}

  public static class W {}

  public static class X {}

  public static class Y {}

  public static class Z {}

  public static class a {}

  public static class b {}

  public static class c {}

  public static class d {}

  public static class e {}

  public static class f {}

  public static class g {}

  public static class h {}

  public static class i {}

  public static class j {}

  public static class k {}

  public static class l {}

  public static class m {}

  public static class n {}

  public static class o {}

  public static class p {}

  public static class q {}

  public static class r {}

  public static class s {}

  public static class t {}

  public static class u {}

  public static class v {}

  public static class w {}

  public static class x {}

  public static class y {}

  public static class z {}

  public static class AA {}

  public static class AB {}

  public static class AC {}

  public static class AD {}

  public static class AE {}

  public static class AF {}

  public static class AG {}

  public static class Main {

    public static void main(String[] args) {
      System.out.println("HELLO WORLD");
    }
  }
}