}
        }
        reader.endObject();
    }

    private void consumeVariants(JsonReader reader, MutableModuleComponentResolveMetadata metadata) throws IOException {
        reader.beginArray();
        while (reader.peek() != JsonToken.END_ARRAY) {
            consumeVariant(reader, metadata);
        }
        reader.endArray();
    }

            if (value == null) {
                out.nullValue();
                return;
            }

            out.beginArray();
            out.name("type").value("pluginId");
            out.name("pluginId").value(value.getPluginId());
            out.endObject();
        }

        @Override

                value = readObject(reader)
                break
            case JsonToken.BEGIN_ARRAY:
                value = readArray(reader)
                break
        }
        value
    }

    private List<Object> readArray(JsonReader reader) {
        List<Object> values = []
        reader.beginArray()
        while (reader.peek() != JsonToken.END_ARRAY) {
            Object value = readAny(reader)

        then:
        def e = thrown(MetaDataParseException)
        e.message == 'Could not parse module metadata <resource>'
        e.cause.message == 'Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 1 column 2 path $'
    }

    def "fails on missing format version"() {
        def metadata = Mock(MutableModuleComponentResolveMetadata)

        when: