// Copyright 2017 The Bazel Authors. All rights reserved.
//
// 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.google.devtools.build.lib.rules.java;

import static com.google.common.truth.Truth.assertThat;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.build.lib.cmdline.LabelSyntaxException;
import com.google.devtools.build.lib.collect.nestedset.NestedSet;
import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/** Unit tests for {@link JavaInfo}. */
@RunWith(JUnit4.class)
public class JavaInfoTest {

  @Test
  public void getTransitiveRuntimeJars_noJavaCompilationArgsProvider() {
    assertThat(JavaInfo.EMPTY.getTransitiveRuntimeJars().isEmpty()).isTrue();
  }

  @Test
  public void getTransitiveCompileTimeJarsJars_noJavaCompilationArgsProvider() {
    assertThat(JavaInfo.EMPTY.getTransitiveCompileTimeJars().isEmpty()).isTrue();
  }

  @Test
  public void getCompileTimeJarsJars_noJavaCompilationArgsProvider() {
    assertThat(JavaInfo.EMPTY.getCompileTimeJars().isEmpty()).isTrue();
  }

  @Test
  public void getFullCompileTimeJarsJars_noJavaCompilationArgsProvider() {
    assertThat(JavaInfo.EMPTY.getFullCompileTimeJars().isEmpty()).isTrue();
  }

  @Test
  public void getSourceJars_noJavaSourceJarsProvider() {
    assertThat(JavaInfo.EMPTY.getSourceJars()).isEmpty();
  }

  @Test
  public void testMergeJavaExportsProvider() throws LabelSyntaxException {

    JavaInfo javaInfo1 =
        JavaInfo.Builder.create()
            .addProvider(JavaExportsProvider.class, createJavaExportsProvider("foo", 2))
            .build();

    JavaInfo javaInfo2 =
        JavaInfo.Builder.create()
            .addProvider(JavaExportsProvider.class, createJavaExportsProvider("bar", 3))
            .build();

    JavaInfo javaInfoMerged = JavaInfo.merge(ImmutableList.of(javaInfo1, javaInfo2));

    NestedSet<Label> labels = javaInfoMerged.getTransitiveExports();

    assertThat(labels)
        .containsExactly(
            Label.parseAbsolute("//foo:foo0.bzl", ImmutableMap.of()),
            Label.parseAbsolute("//foo:foo1.bzl", ImmutableMap.of()),
            Label.parseAbsolute("//bar:bar0.bzl", ImmutableMap.of()),
            Label.parseAbsolute("//bar:bar1.bzl", ImmutableMap.of()),
            Label.parseAbsolute("//bar:bar2.bzl", ImmutableMap.of()))
        .inOrder();
  }

  private JavaExportsProvider createJavaExportsProvider(String prefix, int count)
      throws LabelSyntaxException {
    NestedSetBuilder<Label> builder = NestedSetBuilder.stableOrder();
    for (int i = 0; i < count; i++) {
      String absName = String.format("//%s:%s%d.bzl", prefix, prefix, i);
      Label label = Label.parseAbsolute(absName, ImmutableMap.of());
      builder.add(label);
    } // TODO(dbabkin): refactor to use NestedSetCollector whe it will be ready.
    return new JavaExportsProvider(builder.build());
  }
}