1 files changed, 89 insertions, 0 deletions
diff --git a/document/src/tests/tensor_fieldvalue/partial_add/partial_add_test.cpp b/document/src/tests/tensor_fieldvalue/partial_add/partial_add_test.cpp
new file mode 100644
index 00000000000..db391a5b889
--- /dev/null
+++ b/document/src/tests/tensor_fieldvalue/partial_add/partial_add_test.cpp
@@ -0,0 +1,89 @@
+// Copyright Verizon Media. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+
+#include <vespa/eval/eval/simple_value.h>
+#include <vespa/eval/eval/test/tensor_model.hpp>
+#include <vespa/eval/eval/value_codec.h>
+#include <vespa/document/update/tensor_partial_update.h>
+#include <vespa/vespalib/util/stringfmt.h>
+#include <vespa/vespalib/gtest/gtest.h>
+#include <optional>
+
+using namespace vespalib;
+using namespace vespalib::eval;
+using namespace vespalib::eval::test;
+
+using vespalib::make_string_short::fmt;
+
+std::vector<Layout> add_layouts = {
+    {x({"a"})},                           {x({"b"})},
+    {x({"a","b"})},                       {x({"a","c"})},
+    float_cells({x({"a","b"})}),          {x({"a","c"})},
+    {x({"a","b"})},                       float_cells({x({"a","c"})}),
+    float_cells({x({"a","b"})}),          float_cells({x({"a","c"})}),
+    {x({"a","b","c"}),y({"d","e"})},      {x({"b","f"}),y({"d","g"})},             
+    {x(3),y({"a","b"})},                  {x(3),y({"b","c"})}
+};
+
+TensorSpec reference_add(const TensorSpec &a, const TensorSpec &b) {
+    TensorSpec result(a.type());
+    for (const auto &cell: b.cells()) {
+        result.add(cell.first, cell.second);
+    }
+    auto end_iter = b.cells().end();
+    for (const auto &cell: a.cells()) {
+        auto iter = b.cells().find(cell.first);
+        if (iter == end_iter) {
+            result.add(cell.first, cell.second);
+        }
+    }
+    return result;
+}
+
+Value::UP try_partial_add(const TensorSpec &a, const TensorSpec &b) {
+    const auto &factory = SimpleValueBuilderFactory::get();
+    auto lhs = value_from_spec(a, factory);
+    auto rhs = value_from_spec(b, factory);
+    return tensor::TensorPartialUpdate::add(*lhs, *rhs, factory);
+}
+
+TensorSpec perform_partial_add(const TensorSpec &a, const TensorSpec &b) {
+    auto up = try_partial_add(a, b);
+    EXPECT_TRUE(up);
+    return spec_from_value(*up);
+}
+
+TEST(PartialAddTest, partial_add_works_for_simple_values) {
+    ASSERT_TRUE((add_layouts.size() % 2) == 0);
+    for (size_t i = 0; i < add_layouts.size(); i += 2) {
+        TensorSpec lhs = spec(add_layouts[i], N());
+        TensorSpec rhs = spec(add_layouts[i + 1], Div16(N()));
+        SCOPED_TRACE(fmt("\n===\nLHS: %s\nRHS: %s\n===\n", lhs.to_string().c_str(), rhs.to_string().c_str()));
+        auto expect = reference_add(lhs, rhs);
+        auto actual = perform_partial_add(lhs, rhs);
+        EXPECT_EQ(actual, expect);
+    }
+}
+
+std::vector<Layout> bad_layouts = {
+    {x(3)},                               {x(3),y(1)},
+    {x(3),y(1)},                          {x(3)},
+    {x(3),y(3)},                          {x(3),y({"a"})},
+    {x(3),y({"a"})},                      {x(3),y(3)},
+    {x({"a"})},                           {x({"a"}),y({"b"})},
+    {x({"a"}),y({"b"})},                  {x({"a"})},
+    {x({"a"})},                           {x({"a"}),y(1)}
+};
+
+TEST(PartialAddTest, partial_add_returns_nullptr_on_invalid_inputs) {
+    ASSERT_TRUE((bad_layouts.size() % 2) == 0);
+    for (size_t i = 0; i < bad_layouts.size(); i += 2) {
+        TensorSpec lhs = spec(bad_layouts[i], N());
+        TensorSpec rhs = spec(bad_layouts[i + 1], Div16(N()));
+        SCOPED_TRACE(fmt("\n===\nLHS: %s\nRHS: %s\n===\n", lhs.to_string().c_str(), rhs.to_string().c_str()));
+        auto actual = try_partial_add(lhs, rhs);
+        auto expect = Value::UP();
+        EXPECT_EQ(actual, expect);
+    }
+}
+
+GTEST_MAIN_RUN_ALL_TESTS()