add test case

Author: yanyiwu

test/testdata/testlines.utf8

@@ -8,3 +8,4 @@
 请在一米线外等候
 人事处女干事
 去医院做B超，叫号123
+B超 T恤

test/unittest/TSegments.cpp

@@ -44,13 +44,18 @@ using namespace CppJieba;
 
 TEST(MixSegmentTest, Test1)
 {
-    MixSegment segment("../dict/extra_dict/jieba.dict.small.utf8", "../dict/hmm_model.utf8");;
+    MixSegment segment("../dict/jieba.dict.utf8", "../dict/hmm_model.utf8");;
     const char* str = "我来自北京邮电大学。。。学号123456";
     const char* res[] = {"我", "来自", "北京邮电大学", "。","。","。", "学号", "123456"};
+    const char* str2 = "B超 T恤";
+    const char* res2[] = {"B超"," ", "T恤"};
     vector<string> words;
     ASSERT_TRUE(segment);
+
     ASSERT_TRUE(segment.cut(str, words));
     ASSERT_EQ(words, vector<string>(res, res + sizeof(res)/sizeof(res[0])));
+    ASSERT_TRUE(segment.cut(str2, words));
+    ASSERT_EQ(words, vector<string>(res2, res2 + sizeof(res2)/sizeof(res2[0])));
 }
 
 TEST(MPSegmentTest, Test1)