如何从单个java_test()规则运行Bazel中的所有测试?

在里面 Bazel here . 它很短很直接,你可以把它复制到你的项目中或者做类似的事情。

java_library(
    name = "tests",
    testonly = 1,
    srcs = glob(["*.java"])
)

java_test(
   name = "MyTests",
   test_class = "MyTests",
   runtime_deps = [":tests"],
)

还有我的测试。java文件应如下所示:

import package.ClasspathSuite;

import org.junit.runner.RunWith;

@RunWith(ClasspathSuite.class)
public class MyTests { } 

您可以编写一个JUnit测试套件类,该类将运行其他测试。例如,如果您有测试类Test1。java和Test2。java,您可以这样做:

所有测试。Java语言

import org.junit.runner.RunWith;
import org.junit.runners.Suite;
import org.junit.runners.Suite.SuiteClasses;

@RunWith(Suite.class)
@SuiteClasses({
    Test1.class,
    Test2.class
})
public class AllTests {}

构建

java_test(
    name = "AllTests",
    test_class = "AllTests",
    srcs = [
        "AllTests.java",
        "Test1.java",
        "Test2.java",
    ],
)

如果不想在测试套件中指定测试类名,可以通过反射进行操作。以下示例假设您的所有测试都在“com.foo”包中,并且所有测试都是java\u测试规则的SRC:

package com.foo;

import java.io.File;
import java.io.IOException;
import java.net.URLClassLoader;
import java.util.Enumeration;
import java.util.Set;
import java.util.TreeSet;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import junit.framework.JUnit4TestAdapter;
import junit.framework.TestSuite;
import org.junit.runner.RunWith;

@RunWith(org.junit.runners.AllTests.class)
public class AllTests {
  public static TestSuite suite() throws IOException {
    TestSuite suite = new TestSuite();
    URLClassLoader classLoader = (URLClassLoader) Thread.currentThread().getContextClassLoader();
    // The first entry on the classpath contains the srcs from java_test
    findClassesInJar(new File(classLoader.getURLs()[0].getPath()))
        .stream()
        .map(c -> {
          try {
            return Class.forName(c);
          } catch (ClassNotFoundException e) {
            throw new RuntimeException(e);
          }
        })
        .filter(clazz -> !clazz.equals(AllTests.class))
        .map(JUnit4TestAdapter::new)
        .forEach(suite::addTest);
    return suite;
  }

  private static Set<String> findClassesInJar(File jarFile) {
    Set<String> classNames = new TreeSet<>();
    try {
      try (ZipFile zipFile = new ZipFile(jarFile)) {
        Enumeration<? extends ZipEntry> entries = zipFile.entries();
        while (entries.hasMoreElements()) {
          String entryName = entries.nextElement().getName();
          if (entryName.startsWith("com/foo") && entryName.endsWith(".class")) {
            int classNameEnd = entryName.length() - ".class".length();
            classNames.add(entryName.substring(0, classNameEnd).replace('/', '.'));
          }
        }
      }
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
    return classNames;
  }
}

这里有一个不需要使用Suite的解决方案。

.处理所有测试的bzl宏:

def run_tests(name, srcs, package, deps):
  for src in srcs:
    src_name = src[:-5]
    native.java_test(name=src_name, test_class=package + "." + src_name, srcs=srcs, deps=deps, size="small")

run_tests(
    name = "test",
    srcs = glob(["*Test.java"]),
    package = "pkg",
    deps = [
        ":src_lib",
    ]
)

Gerrit项目包含一个名为 junit_tests . 它获取src列表并生成一个 AllTestsTestSuite.java java_test 包括生成的java文件和所有指定源、DEP等的目标。下面介绍如何设置它。

首先将这些行添加到 WORKSPACE 文件:

load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")

# Re-usable building blocks for Bazel build tool
# https://gerrit.googlesource.com/bazlets/
# https://gerrit.googlesource.com/bazlets/+/968b97fa03a9d2afd760f2e8ede3d5643da390d2
git_repository(
    name = "com_googlesource_gerrit_bazlets",
    remote = "https://gerrit.googlesource.com/bazlets",
    commit = "968b97fa03a9d2afd760f2e8ede3d5643da390d2",
)
# We cannot use the tar.gz provided over HTTP because it contains timestamps and each download has a
# different hash.
#http_archive(
#    name = "com_googlesource_gerrit_bazlets",
#    sha256 = "...",
#    urls = [
#        "https://gerrit.googlesource.com/bazlets/+archive/968b97fa03a9d2afd760f2e8ede3d5643da390d2.tar.gz",
#    ],
#)
# This provides these useful imports:
# load("@com_googlesource_gerrit_bazlets//tools:maven_jar.bzl", "maven_jar")
# load("@com_googlesource_gerrit_bazlets//tools:junit.bzl", "junit_tests")

现在将此添加到 BUILD 文件:

load("@com_googlesource_gerrit_bazlets//tools:junit.bzl", "junit_tests")

junit_tests(
    name = "AllTests",
    srcs = glob(["*.java"]),
    deps = [
        "//java/com/company/a_package",
        "@maven//:junit_junit",
        "@maven//:org_hamcrest_hamcrest",
    ],
)

构建 文件位于 $WORKSPACE_ROOT/javatests/com/company/a_package/BUILD 然后,您可以使用以下工具运行这些特定测试:

bazel test //javatests/com/company/a_package:AllTests

bazel test //javatests/...

如果您的目录包含 .java

/** Workaround for https://github.com/bazelbuild/bazel/issues/2539 */
@Test
public void emptyTest() {}

这对我来说是在MacOS上使用Bazel 2.0.0。我还可以使用Bazel插件在IntelliJ 2019.2中运行测试。