Merge pull request #1886 from dgquintas/run_tests_shuffling

Improvements to the way we randomize test runs.
diff --git a/include/grpc/grpc.h b/include/grpc/grpc.h
index 1ba304b..57bf2fa 100644
--- a/include/grpc/grpc.h
+++ b/include/grpc/grpc.h
@@ -93,7 +93,7 @@
 } grpc_arg;
 
 /** An array of arguments that can be passed around.
-    
+
     Used to set optional channel-level configuration.
     These configuration options are modelled as key-value pairs as defined
     by grpc_arg; keys are strings to allow easy backwards-compatible extension
@@ -170,14 +170,18 @@
 struct grpc_byte_buffer_reader;
 typedef struct grpc_byte_buffer_reader grpc_byte_buffer_reader;
 
-grpc_byte_buffer_reader *grpc_byte_buffer_reader_create(
-    grpc_byte_buffer *buffer);
+/** Initialize \a reader to read over \a buffer */
+void grpc_byte_buffer_reader_init(grpc_byte_buffer_reader *reader,
+                                  grpc_byte_buffer *buffer);
+
+/** Cleanup and destroy \a reader */
+void grpc_byte_buffer_reader_destroy(grpc_byte_buffer_reader *reader);
+
 /* At the end of the stream, returns 0. Otherwise, returns 1 and sets slice to
    be the returned slice. Caller is responsible for calling gpr_slice_unref on
    the result. */
 int grpc_byte_buffer_reader_next(grpc_byte_buffer_reader *reader,
                                  gpr_slice *slice);
-void grpc_byte_buffer_reader_destroy(grpc_byte_buffer_reader *reader);
 
 /* A single metadata element */
 typedef struct grpc_metadata {
diff --git a/src/core/surface/byte_buffer_reader.c b/src/core/surface/byte_buffer_reader.c
index fd5289b..41ad700 100644
--- a/src/core/surface/byte_buffer_reader.c
+++ b/src/core/surface/byte_buffer_reader.c
@@ -39,15 +39,18 @@
 #include <grpc/support/slice_buffer.h>
 #include <grpc/byte_buffer.h>
 
-grpc_byte_buffer_reader *grpc_byte_buffer_reader_create(
-    grpc_byte_buffer *buffer) {
-  grpc_byte_buffer_reader *reader = malloc(sizeof(grpc_byte_buffer_reader));
+void grpc_byte_buffer_reader_init(grpc_byte_buffer_reader *reader,
+                                  grpc_byte_buffer *buffer) {
   reader->buffer = buffer;
   switch (buffer->type) {
     case GRPC_BB_SLICE_BUFFER:
       reader->current.index = 0;
   }
-  return reader;
+}
+
+void grpc_byte_buffer_reader_destroy(grpc_byte_buffer_reader *reader) {
+  /* no-op: the user is responsible for memory deallocation.
+   * Other cleanup operations would go here if needed. */
 }
 
 int grpc_byte_buffer_reader_next(grpc_byte_buffer_reader *reader,
@@ -68,7 +71,3 @@
   }
   return 0;
 }
-
-void grpc_byte_buffer_reader_destroy(grpc_byte_buffer_reader *reader) {
-  free(reader);
-}
diff --git a/src/cpp/proto/proto_utils.cc b/src/cpp/proto/proto_utils.cc
index b9554c4..7a7e73b 100644
--- a/src/cpp/proto/proto_utils.cc
+++ b/src/cpp/proto/proto_utils.cc
@@ -36,6 +36,7 @@
 
 #include <grpc/grpc.h>
 #include <grpc/byte_buffer.h>
+#include <grpc/byte_buffer_reader.h>
 #include <grpc/support/slice.h>
 #include <grpc/support/slice_buffer.h>
 #include <grpc/support/port_platform.h>
@@ -100,11 +101,9 @@
  public:
   explicit GrpcBufferReader(grpc_byte_buffer* buffer)
       : byte_count_(0), backup_count_(0) {
-    reader_ = grpc_byte_buffer_reader_create(buffer);
+    grpc_byte_buffer_reader_init(&reader_, buffer);
   }
-  ~GrpcBufferReader() GRPC_OVERRIDE {
-    grpc_byte_buffer_reader_destroy(reader_);
-  }
+  ~GrpcBufferReader() GRPC_OVERRIDE {}
 
   bool Next(const void** data, int* size) GRPC_OVERRIDE {
     if (backup_count_ > 0) {
@@ -114,7 +113,7 @@
       backup_count_ = 0;
       return true;
     }
-    if (!grpc_byte_buffer_reader_next(reader_, &slice_)) {
+    if (!grpc_byte_buffer_reader_next(&reader_, &slice_)) {
       return false;
     }
     gpr_slice_unref(slice_);
@@ -147,7 +146,7 @@
  private:
   gpr_int64 byte_count_;
   gpr_int64 backup_count_;
-  grpc_byte_buffer_reader* reader_;
+  grpc_byte_buffer_reader reader_;
   gpr_slice slice_;
 };
 
diff --git a/src/cpp/util/byte_buffer.cc b/src/cpp/util/byte_buffer.cc
index ac26574..45eaa2f 100644
--- a/src/cpp/util/byte_buffer.cc
+++ b/src/cpp/util/byte_buffer.cc
@@ -31,6 +31,7 @@
  *
  */
 
+#include <grpc/byte_buffer_reader.h>
 #include <grpc++/byte_buffer.h>
 
 namespace grpc {
@@ -56,12 +57,12 @@
   if (!buffer_) {
     return;
   }
-  grpc_byte_buffer_reader* reader = grpc_byte_buffer_reader_create(buffer_);
+  grpc_byte_buffer_reader reader;
+  grpc_byte_buffer_reader_init(&reader,buffer_);
   gpr_slice s;
-  while (grpc_byte_buffer_reader_next(reader, &s)) {
+  while (grpc_byte_buffer_reader_next(&reader, &s)) {
     slices->push_back(Slice(s, Slice::STEAL_REF));
   }
-  grpc_byte_buffer_reader_destroy(reader);
 }
 
 size_t ByteBuffer::Length() {
diff --git a/src/csharp/ext/grpc_csharp_ext.c b/src/csharp/ext/grpc_csharp_ext.c
index cea23f0..25d8469 100644
--- a/src/csharp/ext/grpc_csharp_ext.c
+++ b/src/csharp/ext/grpc_csharp_ext.c
@@ -33,6 +33,7 @@
 
 #include "src/core/support/string.h"
 
+#include <grpc/byte_buffer_reader.h>
 #include <grpc/support/port_platform.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
@@ -236,13 +237,13 @@
  */
 GPR_EXPORT void GPR_CALLTYPE grpcsharp_batch_context_recv_message_to_buffer(
     const grpcsharp_batch_context *ctx, char *buffer, size_t buffer_len) {
-  grpc_byte_buffer_reader *reader;
+  grpc_byte_buffer_reader reader;
   gpr_slice slice;
   size_t offset = 0;
 
-  reader = grpc_byte_buffer_reader_create(ctx->recv_message);
+  grpc_byte_buffer_reader_init(&reader, ctx->recv_message);
 
-  while (grpc_byte_buffer_reader_next(reader, &slice)) {
+  while (grpc_byte_buffer_reader_next(&reader, &slice)) {
     size_t len = GPR_SLICE_LENGTH(slice);
     GPR_ASSERT(offset + len <= buffer_len);
     memcpy(buffer + offset, GPR_SLICE_START_PTR(slice),
@@ -250,7 +251,6 @@
     offset += len;
     gpr_slice_unref(slice);
   }
-  grpc_byte_buffer_reader_destroy(reader);
 }
 
 GPR_EXPORT grpc_status_code GPR_CALLTYPE
diff --git a/src/node/ext/byte_buffer.cc b/src/node/ext/byte_buffer.cc
index 01bd92e..2c84099 100644
--- a/src/node/ext/byte_buffer.cc
+++ b/src/node/ext/byte_buffer.cc
@@ -36,6 +36,7 @@
 #include <node.h>
 #include <nan.h>
 #include "grpc/grpc.h"
+#include "grpc/byte_buffer_reader.h"
 #include "grpc/support/slice.h"
 
 #include "byte_buffer.h"
@@ -69,9 +70,10 @@
   size_t length = grpc_byte_buffer_length(buffer);
   char *result = reinterpret_cast<char *>(calloc(length, sizeof(char)));
   size_t offset = 0;
-  grpc_byte_buffer_reader *reader = grpc_byte_buffer_reader_create(buffer);
+  grpc_byte_buffer_reader reader;
+  grpc_byte_buffer_reader_init(&reader, buffer);
   gpr_slice next;
-  while (grpc_byte_buffer_reader_next(reader, &next) != 0) {
+  while (grpc_byte_buffer_reader_next(&reader, &next) != 0) {
     memcpy(result + offset, GPR_SLICE_START_PTR(next), GPR_SLICE_LENGTH(next));
     offset += GPR_SLICE_LENGTH(next);
   }
diff --git a/src/objective-c/GRPCClient/private/NSData+GRPC.m b/src/objective-c/GRPCClient/private/NSData+GRPC.m
index 6ea4ce9..3a7f768 100644
--- a/src/objective-c/GRPCClient/private/NSData+GRPC.m
+++ b/src/objective-c/GRPCClient/private/NSData+GRPC.m
@@ -34,23 +34,26 @@
 #import "NSData+GRPC.h"
 
 #include <grpc/byte_buffer.h>
+#include <grpc/byte_buffer_reader.h>
 #include <string.h>
 
 // TODO(jcanizales): Move these two incantations to the C library.
 
 static void CopyByteBufferToCharArray(grpc_byte_buffer *buffer, char *array) {
   size_t offset = 0;
-  grpc_byte_buffer_reader *reader = grpc_byte_buffer_reader_create(buffer);
+  grpc_byte_buffer_reader reader;
+  grpc_byte_buffer_reader_init(&reader, buffer);
   gpr_slice next;
-  while (grpc_byte_buffer_reader_next(reader, &next) != 0){
-    memcpy(array + offset, GPR_SLICE_START_PTR(next), (size_t) GPR_SLICE_LENGTH(next));
+  while (grpc_byte_buffer_reader_next(&reader, &next) != 0){
+    memcpy(array + offset, GPR_SLICE_START_PTR(next),
+           (size_t)GPR_SLICE_LENGTH(next));
     offset += GPR_SLICE_LENGTH(next);
     gpr_slice_unref(next);
   }
-  grpc_byte_buffer_reader_destroy(reader);
 }
 
-static grpc_byte_buffer *CopyCharArrayToNewByteBuffer(const char *array, size_t length) {
+static grpc_byte_buffer *CopyCharArrayToNewByteBuffer(const char *array,
+                                                      size_t length) {
   gpr_slice slice = gpr_slice_from_copied_buffer(array, length);
   grpc_byte_buffer *buffer = grpc_byte_buffer_create(&slice, 1);
   gpr_slice_unref(slice);
diff --git a/src/php/ext/grpc/byte_buffer.c b/src/php/ext/grpc/byte_buffer.c
index 4f3e6b6..bb9d3f5 100644
--- a/src/php/ext/grpc/byte_buffer.c
+++ b/src/php/ext/grpc/byte_buffer.c
@@ -46,6 +46,7 @@
 #include "byte_buffer.h"
 
 #include <grpc/grpc.h>
+#include <grpc/byte_buffer_reader.h>
 #include <grpc/support/slice.h>
 
 grpc_byte_buffer *string_to_byte_buffer(char *string, size_t length) {
@@ -65,9 +66,10 @@
   size_t length = grpc_byte_buffer_length(buffer);
   char *string = ecalloc(length + 1, sizeof(char));
   size_t offset = 0;
-  grpc_byte_buffer_reader *reader = grpc_byte_buffer_reader_create(buffer);
+  grpc_byte_buffer_reader reader;
+  grpc_byte_buffer_reader_init(&reader, buffer);
   gpr_slice next;
-  while (grpc_byte_buffer_reader_next(reader, &next) != 0) {
+  while (grpc_byte_buffer_reader_next(&reader, &next) != 0) {
     memcpy(string + offset, GPR_SLICE_START_PTR(next), GPR_SLICE_LENGTH(next));
     offset += GPR_SLICE_LENGTH(next);
   }
diff --git a/src/python/src/grpc/_adapter/_c/utility.c b/src/python/src/grpc/_adapter/_c/utility.c
index 6d228c7..42d3370 100644
--- a/src/python/src/grpc/_adapter/_c/utility.c
+++ b/src/python/src/grpc/_adapter/_c/utility.c
@@ -36,6 +36,7 @@
 #define PY_SSIZE_T_CLEAN
 #include <Python.h>
 #include <grpc/grpc.h>
+#include <grpc/byte_buffer_reader.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/slice.h>
 #include <grpc/support/time.h>
@@ -443,18 +444,18 @@
 
 void pygrpc_byte_buffer_to_bytes(
     grpc_byte_buffer *buffer, char **result, size_t *result_size) {
-  grpc_byte_buffer_reader *reader = grpc_byte_buffer_reader_create(buffer);
+  grpc_byte_buffer_reader reader;
+  grpc_byte_buffer_reader_init(&reader, buffer);
   gpr_slice slice;
   char *read_result = NULL;
   size_t size = 0;
-  while (grpc_byte_buffer_reader_next(reader, &slice)) {
+  while (grpc_byte_buffer_reader_next(&reader, &slice)) {
     read_result = gpr_realloc(read_result, size + GPR_SLICE_LENGTH(slice));
     memcpy(read_result + size, GPR_SLICE_START_PTR(slice),
            GPR_SLICE_LENGTH(slice));
     size = size + GPR_SLICE_LENGTH(slice);
     gpr_slice_unref(slice);
   }
-  grpc_byte_buffer_reader_destroy(reader);
   *result_size = size;
   *result = read_result;
 }
diff --git a/src/ruby/ext/grpc/rb_byte_buffer.c b/src/ruby/ext/grpc/rb_byte_buffer.c
index edf0d3b..1cc22f4 100644
--- a/src/ruby/ext/grpc/rb_byte_buffer.c
+++ b/src/ruby/ext/grpc/rb_byte_buffer.c
@@ -36,6 +36,7 @@
 #include <ruby/ruby.h>
 
 #include <grpc/grpc.h>
+#include <grpc/byte_buffer_reader.h>
 #include <grpc/support/slice.h>
 #include "rb_grpc.h"
 
@@ -50,7 +51,7 @@
   size_t length = 0;
   char *string = NULL;
   size_t offset = 0;
-  grpc_byte_buffer_reader *reader = NULL;
+  grpc_byte_buffer_reader reader;
   gpr_slice next;
   if (buffer == NULL) {
     return Qnil;
@@ -58,8 +59,8 @@
   }
   length = grpc_byte_buffer_length(buffer);
   string = xmalloc(length + 1);
-  reader = grpc_byte_buffer_reader_create(buffer);
-  while (grpc_byte_buffer_reader_next(reader, &next) != 0) {
+  grpc_byte_buffer_reader_init(&reader, buffer);
+  while (grpc_byte_buffer_reader_next(&reader, &next) != 0) {
     memcpy(string + offset, GPR_SLICE_START_PTR(next), GPR_SLICE_LENGTH(next));
     offset += GPR_SLICE_LENGTH(next);
   }
diff --git a/test/core/surface/byte_buffer_reader_test.c b/test/core/surface/byte_buffer_reader_test.c
index 9265ef1..c2f5fc2 100644
--- a/test/core/surface/byte_buffer_reader_test.c
+++ b/test/core/surface/byte_buffer_reader_test.c
@@ -46,21 +46,10 @@
 
 #define LOG_TEST(x) gpr_log(GPR_INFO, "%s", x)
 
-static void test_create(void) {
-  grpc_byte_buffer *buffer;
-  grpc_byte_buffer_reader *reader;
-  gpr_slice empty = gpr_empty_slice();
-  LOG_TEST("test_create");
-  buffer = grpc_byte_buffer_create(&empty, 1);
-  reader = grpc_byte_buffer_reader_create(buffer);
-  grpc_byte_buffer_reader_destroy(reader);
-  grpc_byte_buffer_destroy(buffer);
-}
-
 static void test_read_one_slice(void) {
   gpr_slice slice;
   grpc_byte_buffer *buffer;
-  grpc_byte_buffer_reader *reader;
+  grpc_byte_buffer_reader reader;
   gpr_slice first_slice, second_slice;
   int first_code, second_code;
 
@@ -68,21 +57,20 @@
   slice = gpr_slice_from_copied_string("test");
   buffer = grpc_byte_buffer_create(&slice, 1);
   gpr_slice_unref(slice);
-  reader = grpc_byte_buffer_reader_create(buffer);
-  first_code = grpc_byte_buffer_reader_next(reader, &first_slice);
+  grpc_byte_buffer_reader_init(&reader, buffer);
+  first_code = grpc_byte_buffer_reader_next(&reader, &first_slice);
   GPR_ASSERT(first_code != 0);
   GPR_ASSERT(memcmp(GPR_SLICE_START_PTR(first_slice), "test", 4) == 0);
   gpr_slice_unref(first_slice);
-  second_code = grpc_byte_buffer_reader_next(reader, &second_slice);
+  second_code = grpc_byte_buffer_reader_next(&reader, &second_slice);
   GPR_ASSERT(second_code == 0);
-  grpc_byte_buffer_reader_destroy(reader);
   grpc_byte_buffer_destroy(buffer);
 }
 
 static void test_read_one_slice_malloc(void) {
   gpr_slice slice;
   grpc_byte_buffer *buffer;
-  grpc_byte_buffer_reader *reader;
+  grpc_byte_buffer_reader reader;
   gpr_slice first_slice, second_slice;
   int first_code, second_code;
 
@@ -91,20 +79,18 @@
   memcpy(GPR_SLICE_START_PTR(slice), "test", 4);
   buffer = grpc_byte_buffer_create(&slice, 1);
   gpr_slice_unref(slice);
-  reader = grpc_byte_buffer_reader_create(buffer);
-  first_code = grpc_byte_buffer_reader_next(reader, &first_slice);
+  grpc_byte_buffer_reader_init(&reader, buffer);
+  first_code = grpc_byte_buffer_reader_next(&reader, &first_slice);
   GPR_ASSERT(first_code != 0);
   GPR_ASSERT(memcmp(GPR_SLICE_START_PTR(first_slice), "test", 4) == 0);
   gpr_slice_unref(first_slice);
-  second_code = grpc_byte_buffer_reader_next(reader, &second_slice);
+  second_code = grpc_byte_buffer_reader_next(&reader, &second_slice);
   GPR_ASSERT(second_code == 0);
-  grpc_byte_buffer_reader_destroy(reader);
   grpc_byte_buffer_destroy(buffer);
 }
 
 int main(int argc, char **argv) {
   grpc_test_init(argc, argv);
-  test_create();
   test_read_one_slice();
   test_read_one_slice_malloc();
   return 0;
diff --git a/tools/dockerfile/grpc_java/Dockerfile b/tools/dockerfile/grpc_java/Dockerfile
index fa67cb2..c20ab46 100644
--- a/tools/dockerfile/grpc_java/Dockerfile
+++ b/tools/dockerfile/grpc_java/Dockerfile
@@ -36,5 +36,8 @@
 RUN cd /var/local/git/grpc-java && \
   ./gradlew build installDist
 
+# Add a service_account directory containing the auth creds file
+ADD service_account service_account
+
 # Specify the default command such that the interop server runs on its known testing port
 CMD ["/var/local/git/grpc-java/run-test-server.sh", "--use_tls=true", "--port=8030"]
diff --git a/tools/gce_setup/grpc_docker.sh b/tools/gce_setup/grpc_docker.sh
index 123d061..b53aa98 100755
--- a/tools/gce_setup/grpc_docker.sh
+++ b/tools/gce_setup/grpc_docker.sh
@@ -1274,8 +1274,7 @@
 #   cmd=$($grpc_gen_test_cmd $flags)
 grpc_interop_gen_java_cmd() {
     local cmd_prefix="sudo docker run grpc/java";
-    local test_script="/var/local/git/grpc-java/run-test-client.sh";
-    local test_script+=" --use_test_ca=true --use_tls=true"
+    local test_script="/var/local/git/grpc-java/run-test-client.sh --use_test_ca=true --use_tls=true";
     local the_cmd="$cmd_prefix $test_script $@";
     echo $the_cmd
 }
@@ -1287,13 +1286,40 @@
 #   cmd=$($grpc_gen_test_cmd $flags)
 grpc_cloud_prod_gen_java_cmd() {
     local cmd_prefix="sudo docker run grpc/java";
-    local test_script="/var/local/git/grpc-java/run-test-client.sh";
-    local test_script+=" --use_tls=true"
+    local test_script="/var/local/git/grpc-java/run-test-client.sh --use_tls=true";
     local gfe_flags=$(_grpc_prod_gfe_flags)
     local the_cmd="$cmd_prefix $test_script $gfe_flags $@";
     echo $the_cmd
 }
 
+# constructs the full dockerized java service_account auth interop test cmd.
+#
+# call-seq:
+#   flags= .... # generic flags to include the command
+#   cmd=$($grpc_gen_test_cmd $flags)
+grpc_cloud_prod_auth_service_account_creds_gen_java_cmd() {
+    local cmd_prefix="sudo docker run grpc/java";
+    local test_script="/var/local/git/grpc-java/run-test-client.sh --use_tls=true";
+    local gfe_flags=$(_grpc_prod_gfe_flags)
+    local added_gfe_flags=$(_grpc_svc_acc_test_flags)
+    local the_cmd="$cmd_prefix $test_script $gfe_flags $added_gfe_flags $@";
+    echo $the_cmd
+}
+
+# constructs the full dockerized java gce auth interop test cmd.
+#
+# call-seq:
+#   flags= .... # generic flags to include the command
+#   cmd=$($grpc_gen_test_cmd $flags)
+grpc_cloud_prod_auth_compute_engine_creds_gen_java_cmd() {
+    local cmd_prefix="sudo docker run grpc/java";
+    local test_script="/var/local/git/grpc-java/run-test-client.sh --use_tls=true";
+    local gfe_flags=$(_grpc_prod_gfe_flags)
+    local added_gfe_flags=$(_grpc_gce_test_flags)
+    local the_cmd="$cmd_prefix $test_script $gfe_flags $added_gfe_flags $@";
+    echo $the_cmd
+}
+
 # constructs the full dockerized php interop test cmd.
 #
 # TODO(mlumish): update this to use the script once that's on git
diff --git a/tools/gce_setup/shared_startup_funcs.sh b/tools/gce_setup/shared_startup_funcs.sh
index a3a3b59..60cd9f6 100755
--- a/tools/gce_setup/shared_startup_funcs.sh
+++ b/tools/gce_setup/shared_startup_funcs.sh
@@ -413,6 +413,9 @@
   [[ $image_label == "grpc/java_base" ]] && {
     grpc_docker_sync_github_key $dockerfile_dir/.ssh 'java_base_ssh_key' || return 1;
   }
+  [[ $image_label == "grpc/java" ]] && {
+    grpc_docker_sync_service_account $dockerfile_dir/service_account || return 1;
+  }
   [[ $image_label == "grpc/ruby" ]] && {
     grpc_docker_sync_roots_pem $dockerfile_dir/cacerts || return 1;
     grpc_docker_sync_service_account $dockerfile_dir/service_account || return 1;