Add test

Author: fmeum

src/test/shell/bazel/remote/build_without_the_bytes_test.sh

@@ -546,6 +546,51 @@ def _gentree(ctx):
     )
     return DefaultInfo(files = depset([out]))
 
+gentree = rule(implementation = _gentree)
+EOF
+
+  cat > a/BUILD <<'EOF'
+load(":gentree.bzl", "gentree")
+gentree(name = "tree")
+cc_binary(name = "main", srcs = [":tree"])
+EOF
+
+  bazel build \
+    --remote_executor=grpc://localhost:${worker_port} \
+    --remote_download_toplevel \
+    --output_groups=compilation_outputs \
+    //a:main || fail "Failed to build //a:main"
+
+  if [[ "$PLATFORM" == "darwin" ]]; then
+    expected_object_file=bazel-bin/a/_objs/main/dir/foo.o
+  else
+    expected_object_file=bazel-bin/a/_pic_objs/main/dir/foo.pic.o
+  fi
+  if ! [[ -f "$expected_object_file" ]]; then
+    fail "Expected toplevel output $expected_object_file to be downloaded"
+  fi
+}
+
+function test_download_minimal_templated_tree_artifact_downloaded_later() {
+  mkdir -p a
+
+  # We need the top-level output to be a tree artifact generated by a template
+  # action. This is one way to do that: generate a tree artifact of C++ source
+  # files, and then compile them with a cc_library / cc_binary rule.
+  #
+  # The default top-level output of a cc_binary is the final binary, which is
+  # not what we want. Instead, we use --output_groups=compilation_outputs to
+  # fetch the .o files as the top-level outputs.
+
+  cat > a/gentree.bzl <<'EOF'
+def _gentree(ctx):
+    out = ctx.actions.declare_directory("dir.cc")
+    ctx.actions.run_shell(
+        outputs = [out],
+        command = "echo 'int main(){return 0;}' > %s/foo.cc" % out.path,
+    )
+    return DefaultInfo(files = depset([out]))
+
 gentree = rule(implementation = _gentree)
 EOF