Add a test for java_common.compile() with a custom bootclasspath

PiperOrigin-RevId: 729519483
Change-Id: I75af66009265c26624a4846974807c279f576c8d

Author: hvadehra

java/test/common/java_common_tests.bzl

@@ -9,6 +9,7 @@ load("//java/common:java_plugin_info.bzl", "JavaPluginInfo")
 load("//java/test/testutil:java_info_subject.bzl", "java_info_subject")
 load("//java/test/testutil:rules/custom_library.bzl", "custom_library")
 load("//java/test/testutil:rules/custom_library_extended_compile_jdeps.bzl", "CompileJdepsInfo", "custom_library_extended_jdeps")
+load("//java/test/testutil:rules/custom_library_with_bootclasspath.bzl", "custom_bootclasspath", "custom_library_with_bootclasspath")
 load("//java/test/testutil:rules/custom_library_with_exports.bzl", "custom_library_with_exports")
 load("//java/test/testutil:rules/custom_library_with_sourcepaths.bzl", "custom_library_with_sourcepaths")
 
@@ -161,6 +162,41 @@ def _test_compile_extend_compile_time_jdeps_rule_outputs_impl(env, targets):
         "{}/Baz.jdeps".format(baz.label.package),
     ])
 
+def _test_compile_bootclasspath(name):
+    util.helper_target(
+        custom_bootclasspath,
+        name = name + "/bootclasspath",
+        srcs = [
+            "custom-system/lib/jrt-fs.jar",
+            "custom-system/lib/modules",
+            "custom-system/release",
+        ],
+    )
+    util.helper_target(
+        custom_library_with_bootclasspath,
+        name = name + "/custom",
+        srcs = ["Main.java"],
+        bootclasspath = name + "/bootclasspath",
+        sourcepath = [":B.jar"],
+    )
+
+    analysis_test(
+        name = name,
+        impl = _test_compile_bootclasspath_impl,
+        target = name + "/custom",
+        attr_values = {"tags": ["min_bazel_7"]},
+    )
+
+def _test_compile_bootclasspath_impl(env, target):
+    assert_that_javac = env.expect.that_target(target).action_generating(
+        target[JavaInfo].java_outputs[0].class_jar.short_path,
+    )
+
+    assert_that_javac.contains_flag_values([(
+        "--system",
+        "{}/custom-system".format(target.label.package),
+    )])
+
 def java_common_tests(name):
     test_suite(
         name = name,
@@ -171,5 +207,6 @@ def java_common_tests(name):
             _test_java_plugin_info,
             _test_compile_extend_compile_time_jdeps,
             _test_compile_extend_compile_time_jdeps_rule_outputs,
+            _test_compile_bootclasspath,
         ],
     )

java/test/testutil/rules/custom_library_with_bootclasspath.bzl

@@ -0,0 +1,46 @@
+"""Helper rule to test custom bootclasspaths in java_common.compile()"""
+
+load("//java/common:java_common.bzl", "java_common")
+load("//java/common:java_semantics.bzl", "semantics")
+
+def _bootclasspath(ctx):
+    files = ctx.files.srcs
+    return [java_common.BootClassPathInfo(bootclasspath = files, system = files)]
+
+custom_bootclasspath = rule(
+    implementation = _bootclasspath,
+    attrs = {
+        "srcs": attr.label_list(allow_files = True),
+    },
+)
+
+def _impl(ctx):
+    output_jar = ctx.actions.declare_file("lib" + ctx.label.name + ".jar")
+    compilation_provider = java_common.compile(
+        ctx,
+        source_files = ctx.files.srcs,
+        output = output_jar,
+        deps = [],
+        sourcepath = ctx.files.sourcepath,
+        strict_deps = "ERROR",
+        java_toolchain = semantics.find_java_toolchain(ctx),
+        bootclasspath = ctx.attr.bootclasspath[java_common.BootClassPathInfo],
+    )
+    return [
+        DefaultInfo(files = depset([output_jar])),
+        compilation_provider,
+    ]
+
+custom_library_with_bootclasspath = rule(
+    implementation = _impl,
+    outputs = {
+        "my_output": "lib%{name}.jar",
+    },
+    attrs = {
+        "srcs": attr.label_list(allow_files = [".java"]),
+        "sourcepath": attr.label_list(allow_files = [".jar"]),
+        "bootclasspath": attr.label(),
+    },
+    toolchains = [semantics.JAVA_TOOLCHAIN_TYPE],
+    fragments = ["java"],
+)