tools/check-flagged-apis/src/com/android/checkflaggedapis/CheckFlaggedApisTest.kt

/*
 * Copyright (C) 2024 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.
 */
package com.android.checkflaggedapis

import android.aconfig.Aconfig
import java.io.ByteArrayInputStream
import java.io.ByteArrayOutputStream
import java.io.InputStream
import org.junit.Assert.assertEquals
import org.junit.Test
import org.junit.runner.RunWith
import org.junit.runners.JUnit4

private val API_SIGNATURE =
    """
      // Signature format: 2.0
      package android {
        public final class Clazz {
          ctor public Clazz();
          field @FlaggedApi("android.flag.foo") public static final int FOO = 1; // 0x1
        }
      }
"""
        .trim()

private val API_VERSIONS =
    """
      <?xml version="1.0" encoding="utf-8"?>
      <api version="3">
        <class name="android/Clazz" since="1">
          <method name="&lt;init>()V"/>
          <field name="FOO"/>
        </class>
      </api>
"""
        .trim()

private fun generateFlagsProto(fooState: Aconfig.flag_state): InputStream {
  val parsed_flag =
      Aconfig.parsed_flag
          .newBuilder()
          .setPackage("android.flag")
          .setName("foo")
          .setState(fooState)
          .setPermission(Aconfig.flag_permission.READ_ONLY)
          .build()
  val parsed_flags = Aconfig.parsed_flags.newBuilder().addParsedFlag(parsed_flag).build()
  val binaryProto = ByteArrayOutputStream()
  parsed_flags.writeTo(binaryProto)
  return ByteArrayInputStream(binaryProto.toByteArray())
}

@RunWith(JUnit4::class)
class CheckFlaggedApisTest {
  @Test
  fun testParseApiSignature() {
    val expected = setOf(Pair(Symbol("android.Clazz.FOO"), Flag("android.flag.foo")))
    val actual = parseApiSignature("in-memory", API_SIGNATURE.byteInputStream())
    assertEquals(expected, actual)
  }

  @Test
  fun testParseFlagValues() {
    val expected: Map<Flag, Boolean> = mapOf(Flag("android.flag.foo") to true)
    val actual = parseFlagValues(generateFlagsProto(Aconfig.flag_state.ENABLED))
    assertEquals(expected, actual)
  }

  @Test
  fun testParseApiVersions() {
    val expected: Set<Symbol> = setOf(Symbol("android.Clazz.FOO"))
    val actual = parseApiVersions(API_VERSIONS.byteInputStream())
    assertEquals(expected, actual)
  }

  @Test
  fun testFindErrorsNoErrors() {
    val expected = setOf<ApiError>()
    val actual =
        findErrors(
            parseApiSignature("in-memory", API_SIGNATURE.byteInputStream()),
            parseFlagValues(generateFlagsProto(Aconfig.flag_state.ENABLED)),
            parseApiVersions(API_VERSIONS.byteInputStream()))
    assertEquals(expected, actual)
  }

  @Test
  fun testFindErrorsDisabledFlaggedApiIsPresent() {
    val expected =
        setOf<ApiError>(
            DisabledFlaggedApiIsPresentError(Symbol("android.Clazz.FOO"), Flag("android.flag.foo")))
    val actual =
        findErrors(
            parseApiSignature("in-memory", API_SIGNATURE.byteInputStream()),
            parseFlagValues(generateFlagsProto(Aconfig.flag_state.DISABLED)),
            parseApiVersions(API_VERSIONS.byteInputStream()))
    assertEquals(expected, actual)
  }
}