/*
 * Copyright 2014-present Facebook, Inc.
 *
 * 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.facebook.buck.android;

import static org.junit.Assert.assertEquals;

import com.facebook.buck.model.BuildTarget;
import com.facebook.buck.model.BuildTargetFactory;
import com.facebook.buck.model.ImmutableFlavor;
import com.facebook.buck.rules.coercer.BuildConfigFields;
import com.google.common.collect.ImmutableList;

import org.junit.Test;

/**
 * Unit test for {@link BuildConfigs}.
 */
public class BuildConfigsTest {

  @Test
  public void testDefaultGenerateBuildConfigDotJava() {
    String expectedJavaCode =
        "// Generated by //java/com/example:build_config. DO NOT MODIFY.\n" +
        "package com.example.buck;\n" +
        "public class BuildConfig {\n" +
        "  private BuildConfig() {}\n" +
        "  public static final boolean DEBUG = !Boolean.parseBoolean(null);\n" +
        "  public static final boolean IS_EXOPACKAGE = Boolean.parseBoolean(null);\n" +
        "  public static final int EXOPACKAGE_FLAGS = !Boolean.parseBoolean(null) ? 0 : 0;\n" +
        "}\n";
    BuildTarget source = BuildTarget
        .builder(BuildTargetFactory.newInstance("//java/com/example:build_config"))
        .addFlavors(ImmutableFlavor.of("graph_enhanced_craziness"))
        .build();
    String observedJavaCode = BuildConfigs.generateBuildConfigDotJava(source, "com.example.buck");
    assertEquals(
        "Because the 'temporary' BuildConfig.java might be used in a unit test, " +
            "DEBUG should default to true, IS_EXOPACKAGE should default to false and ." +
            "EXOPACKAGE_FLAGS should default to an empty HashSet.",
        expectedJavaCode,
        observedJavaCode);
  }

  @Test
  public void testCustomGenerateBuildConfigDotJavaWithoutConstantExpressions() {
    BuildConfigFields customValues = BuildConfigFields.fromFieldDeclarations(ImmutableList.of(
        "String KEYSTORE_TYPE = \"release\"",
        "int BUILD_NUMBER = 42",
        "long BUILD_DATE = 1404321113076000L",
        "float THREE = 3.0F",
        "boolean DEBUG = false",
        "boolean IS_EXOPACKAGE = true"));
    String expectedJavaCode =
        "// Generated by //java/com/example:build_config. DO NOT MODIFY.\n" +
        "package com.example;\n" +
        "public class BuildConfig {\n" +
        "  private BuildConfig() {}\n" +
        "  public static final String KEYSTORE_TYPE = " +
            "!Boolean.parseBoolean(null) ? \"release\" : null;\n" +
        "  public static final int BUILD_NUMBER = " +
            "!Boolean.parseBoolean(null) ? 42 : 0;\n" +
        "  public static final long BUILD_DATE = " +
            "!Boolean.parseBoolean(null) ? 1404321113076000L : 0;\n" +
        "  public static final float THREE = " +
            "!Boolean.parseBoolean(null) ? 3.0F : 0;\n" +
        "  public static final boolean DEBUG = Boolean.parseBoolean(null);\n" +
        "  public static final boolean IS_EXOPACKAGE = !Boolean.parseBoolean(null);\n" +
        "  public static final int EXOPACKAGE_FLAGS = !Boolean.parseBoolean(null) ? 0 : 0;\n" +
        "}\n";
    BuildTarget source = BuildTargetFactory.newInstance("//java/com/example:build_config");
    String observedJavaCode = BuildConfigs.generateBuildConfigDotJava(
        source,
        "com.example",
        /* useConstantExpressions */ false,
        customValues);
    assertEquals(expectedJavaCode, observedJavaCode);
  }

  @Test
  public void testCustomGenerateBuildConfigDotJavaWithConstantExpressions() {
    BuildConfigFields customValues = BuildConfigFields.fromFieldDeclarations(ImmutableList.of(
        "String KEYSTORE_TYPE = \"release\"",
        "int BUILD_NUMBER = 42",
        "long BUILD_DATE = 1404321113076000L",
        "float THREE = 3.0F",
        "boolean DEBUG = false",
        "int EXOPACKAGE_FLAGS = 0"));
    String expectedJavaCode =
        "// Generated by //java/com/example:build_config. DO NOT MODIFY.\n" +
        "package com.example;\n" +
        "public class BuildConfig {\n" +
        "  private BuildConfig() {}\n" +
        "  public static final String KEYSTORE_TYPE = \"release\";\n" +
        "  public static final int BUILD_NUMBER = 42;\n" +
        "  public static final long BUILD_DATE = 1404321113076000L;\n" +
        "  public static final float THREE = 3.0F;\n" +
        "  public static final boolean DEBUG = false;\n" +
        "  public static final int EXOPACKAGE_FLAGS = 0;\n" +
        "  public static final boolean IS_EXOPACKAGE = false;\n" +
        "}\n";
    BuildTarget source = BuildTarget
        .builder(BuildTargetFactory.newInstance("//java/com/example:build_config"))
        .addFlavors(ImmutableFlavor.of("graph_enhanced_craziness"))
        .build();
    String observedJavaCode = BuildConfigs.generateBuildConfigDotJava(
        source,
        "com.example",
        /* useConstantExpressions */ true,
        customValues);
    assertEquals(expectedJavaCode, observedJavaCode);
  }
}