Sync from google3.

Bug: 68239358
Test: Builds. Tested on device. CTS test passes.

bit FrameworksCoreTests:android.view.textclassifier.TextClassificationManagerTest

Change-Id: Ie5e20b06b1c615ab246e7ed7f08e980e61c492c4
diff --git a/datetime/parser_test.cc b/datetime/parser_test.cc
new file mode 100644
index 0000000..721cb86
--- /dev/null
+++ b/datetime/parser_test.cc
@@ -0,0 +1,235 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * 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 <time.h>
+#include <fstream>
+#include <iostream>
+#include <memory>
+#include <string>
+
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+
+#include "datetime/parser.h"
+#include "model_generated.h"
+#include "types-test-util.h"
+
+using testing::ElementsAreArray;
+
+namespace libtextclassifier2 {
+namespace {
+
+std::string GetModelPath() {
+  return LIBTEXTCLASSIFIER_TEST_DATA_DIR;
+}
+
+std::string ReadFile(const std::string& file_name) {
+  std::ifstream file_stream(file_name);
+  return std::string(std::istreambuf_iterator<char>(file_stream), {});
+}
+
+std::string FormatMillis(int64 time_ms_utc) {
+  long time_seconds = time_ms_utc / 1000;  // NOLINT
+  // Format time, "ddd yyyy-mm-dd hh:mm:ss zzz"
+  char buffer[512];
+  strftime(buffer, sizeof(buffer), "%a %Y-%m-%d %H:%M:%S %Z",
+           localtime(&time_seconds));
+  return std::string(buffer);
+}
+
+class ParserTest : public testing::Test {
+ public:
+  void SetUp() override {
+    model_buffer_ = ReadFile(GetModelPath() + "test_model.fb");
+    const Model* model = GetModel(model_buffer_.data());
+    ASSERT_TRUE(model != nullptr);
+    ASSERT_TRUE(model->datetime_model() != nullptr);
+    parser_ = DatetimeParser::Instance(model->datetime_model(), unilib_);
+  }
+
+  bool ParsesCorrectly(const std::string& marked_text,
+                       const int64 expected_ms_utc,
+                       DatetimeGranularity expected_granularity,
+                       const std::string& timezone = "Europe/Zurich") {
+    auto expected_start_index = marked_text.find("{");
+    EXPECT_TRUE(expected_start_index != std::string::npos);
+    auto expected_end_index = marked_text.find("}");
+    EXPECT_TRUE(expected_end_index != std::string::npos);
+
+    std::string text;
+    text += std::string(marked_text.begin(),
+                        marked_text.begin() + expected_start_index);
+    text += std::string(marked_text.begin() + expected_start_index + 1,
+                        marked_text.begin() + expected_end_index);
+    text += std::string(marked_text.begin() + expected_end_index + 1,
+                        marked_text.end());
+
+    std::vector<DatetimeParseResultSpan> results;
+
+    if (!parser_->Parse(text, 0, timezone, /*locales=*/"", &results)) {
+      TC_LOG(ERROR) << text;
+      TC_CHECK(false);
+    }
+    EXPECT_TRUE(!results.empty());
+
+    std::vector<DatetimeParseResultSpan> filtered_results;
+    for (const DatetimeParseResultSpan& result : results) {
+      if (SpansOverlap(result.span,
+                       {expected_start_index, expected_end_index})) {
+        filtered_results.push_back(result);
+      }
+    }
+
+    const std::vector<DatetimeParseResultSpan> expected{
+        {{expected_start_index, expected_end_index - 1},
+         {expected_ms_utc, expected_granularity},
+         /*target_classification_score=*/1.0,
+         /*priority_score=*/0.0}};
+    const bool matches =
+        testing::Matches(ElementsAreArray(expected))(filtered_results);
+    if (!matches) {
+      TC_LOG(ERROR) << "Expected: " << expected[0] << " which corresponds to: "
+                    << FormatMillis(expected[0].data.time_ms_utc);
+      for (int i = 0; i < filtered_results.size(); ++i) {
+        TC_LOG(ERROR) << "Actual[" << i << "]: " << filtered_results[i]
+                      << " which corresponds to: "
+                      << FormatMillis(filtered_results[i].data.time_ms_utc);
+      }
+    }
+    return matches;
+  }
+
+ protected:
+  std::string model_buffer_;
+  std::unique_ptr<DatetimeParser> parser_;
+  UniLib unilib_;
+};
+
+// Test with just a few cases to make debugging of general failures easier.
+TEST_F(ParserTest, ParseShort) {
+  EXPECT_TRUE(
+      ParsesCorrectly("{January 1, 1988}", 567990000000, GRANULARITY_DAY));
+  EXPECT_TRUE(
+      ParsesCorrectly("{three days ago}", -262800000, GRANULARITY_YEAR));
+}
+
+TEST_F(ParserTest, Parse) {
+  EXPECT_TRUE(
+      ParsesCorrectly("{January 1, 1988}", 567990000000, GRANULARITY_DAY));
+  EXPECT_TRUE(ParsesCorrectly("{1 2 2018}", 1517439600000, GRANULARITY_DAY));
+  EXPECT_TRUE(
+      ParsesCorrectly("{january 31 2018}", 1517353200000, GRANULARITY_DAY));
+  EXPECT_TRUE(ParsesCorrectly("lorem {1 january 2018} ipsum", 1514761200000,
+                              GRANULARITY_DAY));
+  EXPECT_TRUE(ParsesCorrectly("{19/apr/2010:06:36:15}", 1271651775000,
+                              GRANULARITY_SECOND));
+  EXPECT_TRUE(ParsesCorrectly("{09/Mar/2004 22:02:40}", 1078866160000,
+                              GRANULARITY_SECOND));
+  EXPECT_TRUE(ParsesCorrectly("{Dec 2, 2010 2:39:58 AM}", 1291253998000,
+                              GRANULARITY_SECOND));
+  EXPECT_TRUE(ParsesCorrectly("{Jun 09 2011 15:28:14}", 1307626094000,
+                              GRANULARITY_SECOND));
+  EXPECT_TRUE(ParsesCorrectly("{Apr 20 00:00:35 2010}", 1271714435000,
+                              GRANULARITY_SECOND));
+  EXPECT_TRUE(
+      ParsesCorrectly("{Mar 16 08:12:04}", 6419524000, GRANULARITY_SECOND));
+  EXPECT_TRUE(ParsesCorrectly("{2012-10-14T22:11:20}", 1350245480000,
+                              GRANULARITY_SECOND));
+  EXPECT_TRUE(ParsesCorrectly("{2014-07-01T14:59:55.711Z}", 1404219595000,
+                              GRANULARITY_SECOND));
+  EXPECT_TRUE(ParsesCorrectly("{2010-06-26 02:31:29,573}", 1277512289000,
+                              GRANULARITY_SECOND));
+  EXPECT_TRUE(ParsesCorrectly("{2006/01/22 04:11:05}", 1137899465000,
+                              GRANULARITY_SECOND));
+  EXPECT_TRUE(
+      ParsesCorrectly("{150423 11:42:35}", 1429782155000, GRANULARITY_SECOND));
+  EXPECT_TRUE(ParsesCorrectly("{11:42:35}", 38555000, GRANULARITY_SECOND));
+  EXPECT_TRUE(ParsesCorrectly("{11:42:35.173}", 38555000, GRANULARITY_SECOND));
+  EXPECT_TRUE(
+      ParsesCorrectly("{23/Apr 11:42:35,173}", 9715355000, GRANULARITY_SECOND));
+  EXPECT_TRUE(ParsesCorrectly("{23/Apr/2015:11:42:35}", 1429782155000,
+                              GRANULARITY_SECOND));
+  EXPECT_TRUE(ParsesCorrectly("{23/Apr/2015 11:42:35}", 1429782155000,
+                              GRANULARITY_SECOND));
+  EXPECT_TRUE(ParsesCorrectly("{23-Apr-2015 11:42:35}", 1429782155000,
+                              GRANULARITY_SECOND));
+  EXPECT_TRUE(ParsesCorrectly("{23-Apr-2015 11:42:35.883}", 1429782155000,
+                              GRANULARITY_SECOND));
+  EXPECT_TRUE(ParsesCorrectly("{23 Apr 2015 11:42:35}", 1429782155000,
+                              GRANULARITY_SECOND));
+  EXPECT_TRUE(ParsesCorrectly("{23 Apr 2015 11:42:35.883}", 1429782155000,
+                              GRANULARITY_SECOND));
+  EXPECT_TRUE(ParsesCorrectly("{04/23/15 11:42:35}", 1429782155000,
+                              GRANULARITY_SECOND));
+  EXPECT_TRUE(ParsesCorrectly("{04/23/2015 11:42:35}", 1429782155000,
+                              GRANULARITY_SECOND));
+  EXPECT_TRUE(ParsesCorrectly("{04/23/2015 11:42:35.883}", 1429782155000,
+                              GRANULARITY_SECOND));
+  EXPECT_TRUE(ParsesCorrectly("{8/5/2011 3:31:18 AM:234}", 1312507878000,
+                              GRANULARITY_SECOND));
+  EXPECT_TRUE(ParsesCorrectly("{9/28/2011 2:23:15 PM}", 1317212595000,
+                              GRANULARITY_SECOND));
+  EXPECT_TRUE(ParsesCorrectly("{19/apr/2010:06:36:15}", 1271651775000,
+                              GRANULARITY_SECOND));
+  EXPECT_TRUE(ParsesCorrectly(
+      "Are sentiments apartments decisively the especially alteration. "
+      "Thrown shy denote ten ladies though ask saw. Or by to he going "
+      "think order event music. Incommode so intention defective at "
+      "convinced. Led income months itself and houses you. After nor "
+      "you leave might share court balls. {19/apr/2010:06:36:15} Are "
+      "sentiments apartments decisively the especially alteration. "
+      "Thrown shy denote ten ladies though ask saw. Or by to he going "
+      "think order event music. Incommode so intention defective at "
+      "convinced. Led income months itself and houses you. After nor "
+      "you leave might share court balls. ",
+      1271651775000, GRANULARITY_SECOND));
+  EXPECT_TRUE(ParsesCorrectly("{january 1 2018 at 4:30}", 1514777400000,
+                              GRANULARITY_MINUTE));
+  EXPECT_TRUE(ParsesCorrectly("{january 1 2018 at 4}", 1514775600000,
+                              GRANULARITY_HOUR));
+  EXPECT_TRUE(ParsesCorrectly("{january 1 2018 at 4pm}", 1514818800000,
+                              GRANULARITY_HOUR));
+
+  // WARNING: The following cases have incorrect granularity.
+  // TODO(zilka): Fix this, when granularity is correctly implemented in
+  // InterpretParseData.
+  EXPECT_TRUE(ParsesCorrectly("{today}", -3600000, GRANULARITY_YEAR));
+  EXPECT_TRUE(ParsesCorrectly("{today}", -57600000, GRANULARITY_YEAR,
+                              "America/Los_Angeles"));
+  EXPECT_TRUE(ParsesCorrectly("{next week}", 255600000, GRANULARITY_YEAR));
+  EXPECT_TRUE(ParsesCorrectly("{next day}", 82800000, GRANULARITY_YEAR));
+  EXPECT_TRUE(ParsesCorrectly("{in three days}", 255600000, GRANULARITY_YEAR));
+  EXPECT_TRUE(
+      ParsesCorrectly("{in three weeks}", 1465200000, GRANULARITY_YEAR));
+  EXPECT_TRUE(ParsesCorrectly("{tomorrow}", 82800000, GRANULARITY_YEAR));
+  EXPECT_TRUE(
+      ParsesCorrectly("{tomorrow at 4:00}", 97200000, GRANULARITY_MINUTE));
+  EXPECT_TRUE(ParsesCorrectly("{tomorrow at 4}", 97200000, GRANULARITY_HOUR));
+  EXPECT_TRUE(ParsesCorrectly("{next wednesday}", 514800000, GRANULARITY_YEAR));
+  EXPECT_TRUE(
+      ParsesCorrectly("{next wednesday at 4}", 529200000, GRANULARITY_HOUR));
+  EXPECT_TRUE(ParsesCorrectly("last seen {today at 9:01 PM}", 72060000,
+                              GRANULARITY_MINUTE));
+  EXPECT_TRUE(
+      ParsesCorrectly("{Three days ago}", -262800000, GRANULARITY_YEAR));
+  EXPECT_TRUE(
+      ParsesCorrectly("{three days ago}", -262800000, GRANULARITY_YEAR));
+}
+
+// TODO(zilka): Add a test that tests multiple locales.
+
+}  // namespace
+}  // namespace libtextclassifier2