test: add test for setting entrypoint to [] (#662)

examples/assertion/BUILD.bazel

@@ -421,7 +421,6 @@ assert_oci_config(
     image = ":case13",
 )
 
-
 # Case 14: created property should be epoch start
 oci_image(
     name = "case14",
@@ -484,6 +483,42 @@ assert_oci_config(
     image = ":case15_cmd",
 )
 
+# Case 16: allow setting entrypoint to `[]`
+# See: https://github.com/bazel-contrib/rules_oci/issues/336
+oci_image(
+    name = "case16_base",
+    architecture = "arm64",
+    cmd = [
+        "-c",
+        "test",
+    ],
+    entrypoint = ["/bin/bash"],
+    os = "linux",
+)
+
+assert_oci_config(
+    name = "test_case16_base",
+    cmd_eq = [
+        "-c",
+        "test",
+    ],
+    entrypoint_eq = ["/bin/bash"],
+    image = ":case16_base",
+)
+
+oci_image(
+    name = "case16",
+    base = ":case16_base",
+    entrypoint = [],
+)
+
+assert_oci_config(
+    name = "test_case16",
+    cmd_eq = None,
+    entrypoint_eq = [],
+    image = ":case16",
+)
+
 # build them as test.
 build_test(
     name = "test",