BUILD.bazel

java_binary(
    name = "HelloFromJava",
    srcs = ["src/test/java/com/example/HelloFromJava.java"],
    create_executable = False,
)

# A library that wraps a Java method into a C++ method by starting a JVM and
# executing the method in it. It has access to the usual jni.h header via the
# dependency on @fmeum_rules_jni//jni, but does not require any code specific
# to rules_jni.
cc_library(
    name = "hello_from_java",
    srcs = ["hello_from_java.cpp"],
    hdrs = ["hello_from_java.h"],
    data = [
        ":HelloFromJava_deploy.jar",
    ],
    deps = [
        "@bazel_tools//tools/cpp/runfiles",
        "@fmeum_rules_jni//jni",
    ],
)

# A program that uses :hello_from_java. It depends on
# @fmeum_rules_jni//jni:libjvm to link in the logic that finds and loads libjvm
# at runtime. The only rules_jni-specific part of the code is a call to
# rules_jni_init, which ensures that rules_jni can use the Bazel-provided JDK.
cc_library(
    name = "libjvm_test_lib",
    srcs = ["libjvm_test.cpp"],
    deps = [
        ":hello_from_java",
        "@bazel_tools//tools/cpp/runfiles",
        "@fmeum_rules_jni//jni:libjvm",
    ],
)

cc_library(
    name = "libjvm_release_test_lib",
    srcs = ["libjvm_test.cpp"],
    deps = [
        ":hello_from_java",
        "@bazel_tools//tools/cpp/runfiles",
        "@fmeum_rules_jni//jni:libjvm_lite",
    ],
)

cc_test(
    name = "hermetic_test",
    size = "small",
    env = {
        "HERMETIC": "1",
        # Setting PATH in env directly does not work, so we let the test
        # override it with this value.
        "PATH_OVERRIDE": "",
        "RULES_JNI_TRACE": "1",
    },
    deps = [
        ":libjvm_test_lib",
    ],
)

cc_test(
    name = "java_home_release_test",
    size = "small",
    env = {
        # Setting PATH in env directly does not work, so we let the test
        # override it with this value.
        "PATH_OVERRIDE": "",
        "RULES_JNI_TRACE": "1",
    },
    env_inherit = [
        "JAVA_HOME",
    ],
    tags = [
        "no-coverage",
    ],
    deps = [
        ":libjvm_release_test_lib",
    ],
)

cc_test(
    name = "java_home_test",
    size = "small",
    env = {
        # Setting PATH in env directly does not work, so we let the test
        # override it with this value.
        "PATH_OVERRIDE": "",
        "RULES_JNI_TRACE": "1",
    },
    env_inherit = [
        "JAVA_HOME",
    ],
    deps = [
        ":libjvm_test_lib",
    ],
)

cc_test(
    name = "path_release_test",
    size = "small",
    env = {
        "RULES_JNI_TRACE": "1",
    },
    env_inherit = [
        "PATH",
    ],
    tags = [
        "no-coverage",
    ],
    deps = [
        ":libjvm_release_test_lib",
    ],
)

cc_test(
    name = "path_test",
    size = "small",
    env = {
        "RULES_JNI_TRACE": "1",
    },
    env_inherit = [
        "PATH",
    ],
    deps = [
        ":libjvm_test_lib",
    ],
)

cc_test(
    name = "hermetic_release_failure_test",
    size = "small",
    srcs = ["hermetic_release_failure_test.c"],
    env = {
        "HERMETIC": "1",
        # Setting PATH in env directly does not work, so we let the test
        # override it with this value.
        "PATH_OVERRIDE": "",
        "RULES_JNI_TRACE": "1",
    },
    target_compatible_with = select({
        # Skip on macOS since the /usr/libexec/java_home fallback means that
        # a JDK will still be found without PATH and JAVA_HOME.
        "@platforms//os:macos": ["@platforms//:incompatible"],
        "//conditions:default": [],
    }),
    deps = [
        "@fmeum_rules_jni//jni:libjvm_lite",
    ],
)