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//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "runtime/components/prompt_template.h"
#include <algorithm>
#include <filesystem> // NOLINT: Required for path manipulation.
#include <fstream>
#include <iterator>
#include <string>
#include <utility>
#include <gmock/gmock.h>
#include <gtest/gtest.h>
#include "absl/status/status.h" // from @com_google_absl
#include "absl/status/statusor.h" // from @com_google_absl
#include "absl/strings/str_cat.h" // from @com_google_absl
#include "absl/strings/string_view.h" // from @com_google_absl
#include "absl/time/civil_time.h" // from @com_google_absl
#include "absl/time/time.h" // from @com_google_absl
#include "nlohmann/json.hpp" // from @nlohmann_json
#include "runtime/util/test_utils.h" // NOLINT
namespace litert::lm {
namespace {
using json = nlohmann::ordered_json;
constexpr char kTestdataDir[] =
"litert_lm/runtime/components/testdata/";
constexpr absl::string_view kTestModelTemplates[] = {
"google-gemma-3n-e2b-it", "Qwen-Qwen3-0.6B", "HuggingFaceTB-SmolLM3-3B",
"microsoft-Phi-4-mini-instruct", "bos-token-test"};
json GetMessageSystem() {
return {
{"role", "system"},
{"content", "I am The System!"},
};
}
json GetMessageUserTextTurn1() {
return {
{"role", "user"},
{"content", "I need help"},
};
}
json GetMessageAssistantText() {
return {
{"role", "assistant"},
{"content", "Hi, what can I do for you?"},
};
}
json GetMessageUserTextTurn2() {
return {
{"role", "user"},
{"content", "Write a poem about a cat"},
};
}
json GetTools() {
return json::parse(R"({
"type": "function",
"function": {
"name": "GetWeather",
"description": "Get the weather of the location.",
"parameters": {
"type": "object",
"properties": {
"location": {
"type": "string",
"description": "The location to get the weather for."
}
},
"required": ["location"]
}
}
})");
}
std::string GetTestdataPath(const std::string& file_name) {
return (std::filesystem::path(::testing::SrcDir()) / kTestdataDir / file_name)
.string();
}
absl::StatusOr<std::string> GetContents(const std::string& path) {
std::ifstream input_stream(path);
if (!input_stream.is_open()) {
return absl::InternalError(absl::StrCat("Could not open file: ", path));
}
std::string content;
content.assign((std::istreambuf_iterator<char>(input_stream)),
(std::istreambuf_iterator<char>()));
return std::move(content);
}
class PromptTemplateTest : public ::testing::TestWithParam<absl::string_view> {
};
TEST_P(PromptTemplateTest, CreateTest) {
const std::string test_model_template = std::string(GetParam());
const std::string test_file_name = test_model_template + ".jinja";
const std::string golden_file_name =
test_model_template + "-jinja-golden.txt";
const std::string test_file_path = GetTestdataPath(test_file_name);
ASSERT_OK_AND_ASSIGN(const std::string template_content,
GetContents(test_file_path));
PromptTemplate prompt_template(template_content);
PromptTemplateInput input{
.messages =
json::array({GetMessageSystem(), GetMessageUserTextTurn1(),
GetMessageAssistantText(), GetMessageUserTextTurn2()}),
.tools = json::array({GetTools()}),
.add_generation_prompt = true,
.extra_context = json::object({{"enable_thinking", false}}),
.now = absl::FromCivil(absl::CivilHour(2025, 7, 29, 12),
absl::UTCTimeZone()),
};
ASSERT_OK_AND_ASSIGN(const std::string rendered_prompt,
prompt_template.Apply(input));
const std::string golden_file_path = GetTestdataPath(golden_file_name);
ASSERT_OK_AND_ASSIGN(const std::string golden_content,
GetContents(golden_file_path));
EXPECT_EQ(rendered_prompt, golden_content);
}
INSTANTIATE_TEST_SUITE_P(
PromptTemplateTest, PromptTemplateTest,
testing::ValuesIn(kTestModelTemplates),
[](const testing::TestParamInfo<PromptTemplateTest::ParamType>& info) {
std::string name = std::string(info.param);
std::replace(name.begin(), name.end(), '.', '_');
std::replace(name.begin(), name.end(), '-', '_');
return name;
});
} // namespace
} // namespace litert::lm
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