Add bazel target for junit tests

This was missed when converting from maven.

Also run buildifier on BUILD to make formatting changes.

Change-Id: I105ec710b7810fa209bd47b0a69bc210e5fdf7da
diff --git a/BUILD b/BUILD
index 98e5b3b..c42999d 100644
--- a/BUILD
+++ b/BUILD
@@ -1,10 +1,10 @@
+load("//tools/bzl:junit.bzl", "junit_tests")
 load(
     "//tools/bzl:plugin.bzl",
     "PLUGIN_DEPS",
     "PLUGIN_TEST_DEPS",
     "gerrit_plugin",
 )
-
 load("@rules_java//java:defs.bzl", "java_library", "java_plugin")
 
 plugin_name = "events"
@@ -22,11 +22,24 @@
     resources = glob(["src/main/resources/**/*"]),
 )
 
+junit_tests(
+    name = "events_tests",
+    size = "small",
+    srcs = glob(["src/test/java/**/*Test.java"]),
+    tags = ["events"],
+    deps = PLUGIN_TEST_DEPS + PLUGIN_DEPS + [
+        plugin_name,
+    ],
+)
+
 sh_test(
     name = "docker-tests",
     size = "medium",
     srcs = ["test/docker/run.sh"],
-    args = ["--events-plugin-jar", "$(location :events)"],
+    args = [
+        "--events-plugin-jar",
+        "$(location :events)",
+    ],
     data = [plugin_name] + glob(["test/**"]),
     local = True,
 )
diff --git a/tools/bzl/junit.bzl b/tools/bzl/junit.bzl
new file mode 100644
index 0000000..97307bd
--- /dev/null
+++ b/tools/bzl/junit.bzl
@@ -0,0 +1,6 @@
+load(
+    "@com_googlesource_gerrit_bazlets//tools:junit.bzl",
+    _junit_tests = "junit_tests",
+)
+
+junit_tests = _junit_tests