9 files changed, 134 insertions, 7 deletions
diff --git a/native/jni/Android.mk b/native/jni/Android.mk
index c1372bd70..5c117cea9 100644
--- a/native/jni/Android.mk
+++ b/native/jni/Android.mk
@@ -87,6 +87,8 @@ LOCAL_NDK_STL_VARIANT := c++_static
 LOCAL_LDFLAGS += -ldl
 
 include $(BUILD_SHARED_LIBRARY)
-
 #################### Clean up the tmp vars
 include $(LOCAL_PATH)/CleanupNativeFileList.mk
+
+#################### Unit test on host environment
+include $(LOCAL_PATH)/HostUnitTests.mk
diff --git a/native/jni/CleanupNativeFileList.mk b/native/jni/CleanupNativeFileList.mk
index 5420f16f9..1738f8c58 100644
--- a/native/jni/CleanupNativeFileList.mk
+++ b/native/jni/CleanupNativeFileList.mk
@@ -13,5 +13,6 @@
 # limitations under the License.
 
 LATIN_IME_CORE_SRC_FILES :=
+LATIN_IME_CORE_TEST_FILES :=
 LATIN_IME_JNI_SRC_FILES :=
 LATIN_IME_SRC_DIR :=
diff --git a/native/jni/HostUnitTests.mk b/native/jni/HostUnitTests.mk
new file mode 100644
index 000000000..828edce61
--- /dev/null
+++ b/native/jni/HostUnitTests.mk
@@ -0,0 +1,53 @@
+# Copyright (C) 2014 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.
+
+LOCAL_PATH := $(call my-dir)
+
+######################################
+include $(CLEAR_VARS)
+
+include $(LOCAL_PATH)/NativeFileList.mk
+
+#################### Host library for unit test
+# TODO: Remove -std=c++11 once it is set by default on host build.
+LATIN_IME_SRC_DIR := src
+LOCAL_CFLAGS += -std=c++11 -Wno-unused-parameter -Wno-unused-function
+LOCAL_CLANG := true
+LOCAL_C_INCLUDES += $(LOCAL_PATH)/$(LATIN_IME_SRC_DIR)
+LOCAL_IS_HOST_MODULE := true
+LOCAL_MODULE := liblatinime_host_static_for_unittests
+LOCAL_MODULE_TAGS := optional
+LOCAL_NDK_STL_VARIANT := c++_static
+LOCAL_SRC_FILES := $(addprefix $(LATIN_IME_SRC_DIR)/, $(LATIN_IME_CORE_SRC_FILES))
+include $(BUILD_HOST_STATIC_LIBRARY)
+
+#################### Host native tests
+include $(CLEAR_VARS)
+LATIN_IME_TEST_SRC_DIR := tests
+# TODO: Remove -std=c++11 once it is set by default on host build.
+LOCAL_CFLAGS += -std=c++11 -Wno-unused-parameter -Wno-unused-function
+LOCAL_CLANG := true
+LOCAL_C_INCLUDES += $(LOCAL_PATH)/$(LATIN_IME_SRC_DIR)
+LOCAL_IS_HOST_MODULE := true
+LOCAL_MODULE := liblatinime_host_unittests
+LOCAL_MODULE_TAGS := tests
+LOCAL_NDK_STL_VARIANT := c++_static
+LOCAL_SRC_FILES := $(addprefix $(LATIN_IME_TEST_SRC_DIR)/, $(LATIN_IME_CORE_TEST_FILES))
+LOCAL_STATIC_LIBRARIES += liblatinime_host_static_for_unittests libgtest_host libgtest_main_host
+include $(BUILD_HOST_NATIVE_TEST)
+
+#################### Clean up the tmp vars
+LATIN_IME_SRC_DIR :=
+LATIN_IME_TEST_SRC_DIR :=
+include $(LOCAL_PATH)/CleanupNativeFileList.mk
diff --git a/native/jni/NativeFileList.mk b/native/jni/NativeFileList.mk
index 2ee4caa42..3da9d5632 100644
--- a/native/jni/NativeFileList.mk
+++ b/native/jni/NativeFileList.mk
@@ -99,3 +99,6 @@ LATIN_IME_CORE_SRC_FILES := \
         char_utils.cpp \
         log_utils.cpp \
         time_keeper.cpp)
+
+LATIN_IME_CORE_TEST_FILES := \
+    utils/autocorrection_threshold_utils_test.cpp
diff --git a/native/jni/run-tests.sh b/native/jni/run-tests.sh
new file mode 100755
index 000000000..5b60e0d65
--- /dev/null
+++ b/native/jni/run-tests.sh
@@ -0,0 +1,29 @@
+#!/bin/bash
+# Copyright 2014, 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.
+
+if [[ $(type -t mmm) != function ]]; then
+echo "Usage:" 1>&2
+echo "    source $0" 1>&2
+echo "  or" 1>&2
+echo "    . $0" 1>&2
+if [[ ${BASH_SOURCE[0]} != $0 ]]; then return; else exit 1; fi
+fi
+
+pushd $PWD > /dev/null
+cd $(gettop)
+mmm -j16 packages/inputmethods/LatinIME/native/jni || \
+    make -j16 liblatinime_host_unittests
+${ANDROID_HOST_OUT}/bin/liblatinime_host_unittests
+popd > /dev/null
+\ No newline at end of file
diff --git a/native/jni/src/suggest/policyimpl/typing/scoring_params.cpp b/native/jni/src/suggest/policyimpl/typing/scoring_params.cpp
index c4c57169b..fa9600c74 100644
--- a/native/jni/src/suggest/policyimpl/typing/scoring_params.cpp
+++ b/native/jni/src/suggest/policyimpl/typing/scoring_params.cpp
@@ -52,8 +52,8 @@ const float ScoringParams::SUBSTITUTION_COST = 0.3806f;
 const float ScoringParams::COST_NEW_WORD = 0.0314f;
 const float ScoringParams::COST_SECOND_OR_LATER_WORD_FIRST_CHAR_UPPERCASE = 0.3224f;
 const float ScoringParams::DISTANCE_WEIGHT_LANGUAGE = 1.1214f;
-const float ScoringParams::COST_FIRST_LOOKAHEAD = 0.4836f;
-const float ScoringParams::COST_LOOKAHEAD = 0.00624f;
+const float ScoringParams::COST_FIRST_COMPLETION = 0.4836f;
+const float ScoringParams::COST_COMPLETION = 0.00624f;
 const float ScoringParams::HAS_PROXIMITY_TERMINAL_COST = 0.0683f;
 const float ScoringParams::HAS_EDIT_CORRECTION_TERMINAL_COST = 0.0362f;
 const float ScoringParams::HAS_MULTI_WORD_TERMINAL_COST = 0.4182f;
diff --git a/native/jni/src/suggest/policyimpl/typing/scoring_params.h b/native/jni/src/suggest/policyimpl/typing/scoring_params.h
index de7410d39..b66962019 100644
--- a/native/jni/src/suggest/policyimpl/typing/scoring_params.h
+++ b/native/jni/src/suggest/policyimpl/typing/scoring_params.h
@@ -59,8 +59,8 @@ class ScoringParams {
     static const float COST_NEW_WORD;
     static const float COST_SECOND_OR_LATER_WORD_FIRST_CHAR_UPPERCASE;
     static const float DISTANCE_WEIGHT_LANGUAGE;
-    static const float COST_FIRST_LOOKAHEAD;
-    static const float COST_LOOKAHEAD;
+    static const float COST_FIRST_COMPLETION;
+    static const float COST_COMPLETION;
     static const float HAS_PROXIMITY_TERMINAL_COST;
     static const float HAS_EDIT_CORRECTION_TERMINAL_COST;
     static const float HAS_MULTI_WORD_TERMINAL_COST;
diff --git a/native/jni/src/suggest/policyimpl/typing/typing_weighting.h b/native/jni/src/suggest/policyimpl/typing/typing_weighting.h
index b36605af9..0ba439b47 100644
--- a/native/jni/src/suggest/policyimpl/typing/typing_weighting.h
+++ b/native/jni/src/suggest/policyimpl/typing/typing_weighting.h
@@ -166,8 +166,8 @@ class TypingWeighting : public Weighting {
         const bool firstCompletion = dicNode->getInputIndex(0)
                 == traverseSession->getInputSize();
         // TODO: Change the cost for the first completion for the gesture?
-        const float cost = firstCompletion ? ScoringParams::COST_FIRST_LOOKAHEAD
-                : ScoringParams::COST_LOOKAHEAD;
+        const float cost = firstCompletion ? ScoringParams::COST_FIRST_COMPLETION
+                : ScoringParams::COST_COMPLETION;
         return cost;
     }
 
diff --git a/native/jni/tests/utils/autocorrection_threshold_utils_test.cpp b/native/jni/tests/utils/autocorrection_threshold_utils_test.cpp
new file mode 100644
index 000000000..cc8db700f
--- /dev/null
+++ b/native/jni/tests/utils/autocorrection_threshold_utils_test.cpp
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2014 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 "utils/autocorrection_threshold_utils.h"
+
+#include <gtest/gtest.h>
+
+#include <vector>
+
+namespace latinime {
+namespace {
+
+int CalcEditDistance(const std::vector<int> &before,
+        const std::vector<int> &after) {
+    return AutocorrectionThresholdUtils::editDistance(
+            &before[0], before.size(), &after[0], after.size());
+}
+
+TEST(AutocorrectionThresholdUtilsTest, SameData) {
+    EXPECT_EQ(0, CalcEditDistance({1}, {1}));
+    EXPECT_EQ(0, CalcEditDistance({2, 2}, {2, 2}));
+    EXPECT_EQ(0, CalcEditDistance({3, 3, 3}, {3, 3, 3}));
+}
+
+}  // namespace
+}  // namespace latinime