src/test/java/com/google/devtools/build/lib/view/java/JavaCompileOnlyTest.java

// Copyright 2022 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.view.java;

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

import com.google.devtools.build.lib.analysis.ConfiguredTarget;
import com.google.devtools.build.lib.analysis.util.CompileOnlyTestCase;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/** Unit tests that validate --compile_only behavior. */
@RunWith(JUnit4.class)
public class JavaCompileOnlyTest extends CompileOnlyTestCase {

  @Before
  public void setupStarlarkJavaBinary() throws Exception {
    setBuildLanguageOptions("--experimental_google_legacy_api");
  }

  @Test
  public void testJavaCompileOnly() throws Exception {
    scratch.file(
        "java/main/BUILD",
        "java_binary(name = 'main',",
        "            deps = ['//java/hello_library'],",
        "            srcs = ['Main.java'],",
        "            main_class = 'main.Main',",
        "            deploy_manifest_lines = ['k1: v1', 'k2: v2'])");
    scratch.file(
        "java/hello_library/BUILD",
        "java_library(name = 'hello_library',",
        "             srcs = ['HelloLibrary.java'])");
    scratch.file(
        "java/main/Main.java",
        "package main;",
        "import hello_library.HelloLibrary;",
        "public class Main {",
        "  public static void main(String[] args) {",
        "    HelloLibrary.funcHelloLibrary();",
        "    System.out.println(\"Hello, world!\");",
        "  }",
        "}");
    scratch.file(
        "java/hello_library/HelloLibrary.java",
        "package hello_library;",
        "public class HelloLibrary {",
        "  public static void funcHelloLibrary() {",
        "    System.out.println(\"Hello, library!\");",
        "  }",
        "}");

    ConfiguredTarget target = getConfiguredTarget("//java/main:main");

    // Check that only main.jar would have been compiled and not libhello_library.jar.
    assertThat(getArtifactByExecPathSuffix(target, "/main.jar")).isNotNull();
    assertThat(getArtifactByExecPathSuffix(target, "/libhello_library.jar")).isNull();
  }
}