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+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef __GRPC_TEST_END2END_CQ_VERIFIER_H__
+#define __GRPC_TEST_END2END_CQ_VERIFIER_H__
+
+#include <grpc/grpc.h>
+
+/* A cq_verifier can verify that expected events arrive in a timely fashion
+   on a single completion queue */
+
+typedef struct cq_verifier cq_verifier;
+
+/* construct/destroy a cq_verifier */
+cq_verifier *cq_verifier_create(grpc_completion_queue *cq);
+void cq_verifier_destroy(cq_verifier *v);
+
+/* ensure all expected events (and only those events) are present on the
+   bound completion queue */
+void cq_verify(cq_verifier *v);
+
+/* ensure that the completion queue is empty */
+void cq_verify_empty(cq_verifier *v);
+
+/* Various expectation matchers
+   Any functions taking ... expect a NULL terminated list of key/value pairs
+   (each pair using two parameter slots) of metadata that MUST be present in
+   the event. */
+void cq_expect_invoke_accepted(cq_verifier *v, void *tag, grpc_op_error result);
+void cq_expect_write_accepted(cq_verifier *v, void *tag, grpc_op_error result);
+void cq_expect_finish_accepted(cq_verifier *v, void *tag, grpc_op_error result);
+void cq_expect_read(cq_verifier *v, void *tag, gpr_slice bytes);
+void cq_expect_empty_read(cq_verifier *v, void *tag);
+/* *output_call is set the the server call instance */
+void cq_expect_server_rpc_new(cq_verifier *v, grpc_call **output_call,
+                              void *tag, const char *method, const char *host,
+                              gpr_timespec deadline, ...);
+void cq_expect_client_metadata_read(cq_verifier *v, void *tag, ...);
+void cq_expect_finished_with_status(cq_verifier *v, void *tag,
+                                    grpc_status status, ...);
+void cq_expect_finished(cq_verifier *v, void *tag, ...);
+
+#endif  /* __GRPC_TEST_END2END_CQ_VERIFIER_H__ */