Rewrite simple test (only grpc output)

vendor/github.com/huandu/xstrings/convert_test.go

@@ -0,0 +1,163 @@
+// Copyright 2015 Huan Du. All rights reserved.
+// Licensed under the MIT license that can be found in the LICENSE file.
+
+package xstrings
+
+import (
+	"sort"
+	"strings"
+	"testing"
+)
+
+func TestToSnakeCase(t *testing.T) {
+	runTestCases(t, ToSnakeCase, _M{
+		"HTTPServer":         "http_server",
+		"_camelCase":         "_camel_case",
+		"NoHTTPS":            "no_https",
+		"Wi_thF":             "wi_th_f",
+		"_AnotherTES_TCaseP": "_another_tes_t_case_p",
+		"ALL":                "all",
+		"_HELLO_WORLD_":      "_hello_world_",
+		"HELLO_WORLD":        "hello_world",
+		"HELLO____WORLD":     "hello____world",
+		"TW":                 "tw",
+		"_C":                 "_c",
+
+		"  sentence case  ":                                    "__sentence_case__",
+		" Mixed-hyphen case _and SENTENCE_case and UPPER-case": "_mixed_hyphen_case__and_sentence_case_and_upper_case",
+	})
+}
+
+func TestToCamelCase(t *testing.T) {
+	runTestCases(t, ToCamelCase, _M{
+		"http_server":     "HttpServer",
+		"_camel_case":     "_CamelCase",
+		"no_https":        "NoHttps",
+		"_complex__case_": "_Complex_Case_",
+		"all":             "All",
+	})
+}
+
+func TestSwapCase(t *testing.T) {
+	runTestCases(t, SwapCase, _M{
+		"swapCase": "SWAPcASE",
+		"Θ~λa云Ξπ":  "θ~ΛA云ξΠ",
+	})
+}
+
+func TestFirstRuneToUpper(t *testing.T) {
+	runTestCases(t, FirstRuneToUpper, _M{
+		"hello, world!": "Hello, world!",
+		"Hello, world!": "Hello, world!",
+		"你好，世界！":        "你好，世界！",
+	})
+}
+
+func TestFirstRuneToLower(t *testing.T) {
+	runTestCases(t, FirstRuneToLower, _M{
+		"hello, world!": "hello, world!",
+		"Hello, world!": "hello, world!",
+		"你好，世界！":        "你好，世界！",
+	})
+}
+
+func TestShuffle(t *testing.T) {
+	// It seems there is no reliable way to test shuffled string.
+	// Runner just make sure shuffled string has the same runes as origin string.
+	runner := func(str string) string {
+		s := Shuffle(str)
+		slice := sort.StringSlice(strings.Split(s, ""))
+		slice.Sort()
+		return strings.Join(slice, "")
+	}
+
+	runTestCases(t, runner, _M{
+		"":            "",
+		"facgbheidjk": "abcdefghijk",
+		"尝试中文":        "中尝文试",
+		"zh英文hun排":    "hhnuz排文英",
+	})
+}
+
+type testShuffleSource int
+
+// A generated random number sequance just for testing.
+var testShuffleTable = []int64{
+	1874068156324778273,
+	3328451335138149956,
+	5263531936693774911,
+	7955079406183515637,
+	2703501726821866378,
+	2740103009342231109,
+	6941261091797652072,
+	1905388747193831650,
+	7981306761429961588,
+	6426100070888298971,
+	4831389563158288344,
+	261049867304784443,
+	1460320609597786623,
+	5600924393587988459,
+	8995016276575641803,
+	732830328053361739,
+	5486140987150761883,
+	545291762129038907,
+	6382800227808658932,
+	2781055864473387780,
+	1598098976185383115,
+	4990765271833742716,
+	5018949295715050020,
+	2568779411109623071,
+	3902890183311134652,
+	4893789450120281907,
+	2338498362660772719,
+	2601737961087659062,
+	7273596521315663110,
+	3337066551442961397,
+	8121576815539813105,
+	2740376916591569721,
+	8249030965139585917,
+	898860202204764712,
+	9010467728050264449,
+	685213522303989579,
+	2050257992909156333,
+	6281838661429879825,
+	2227583514184312746,
+	2873287401706343734,
+}
+
+func (src testShuffleSource) Int63() int64 {
+	n := testShuffleTable[int(src)%len(testShuffleTable)]
+	src++
+	return n
+}
+
+func (src testShuffleSource) Seed(int64) {}
+
+func TestShuffleSource(t *testing.T) {
+	var src testShuffleSource
+	runner := func(str string) string {
+		return ShuffleSource(str, src)
+	}
+
+	runTestCases(t, runner, _M{
+		"":            "",
+		"facgbheidjk": "bakefjgichd",
+		"尝试中文怎么样":     "怎试中样尝么文",
+		"zh英文hun排":    "hh英nzu文排",
+	})
+}
+
+func TestSuccessor(t *testing.T) {
+	runTestCases(t, Successor, _M{
+		"":          "",
+		"abcd":      "abce",
+		"THX1138":   "THX1139",
+		"<<koala>>": "<<koalb>>",
+		"1999zzz":   "2000aaa",
+		"ZZZ9999":   "AAAA0000",
+		"***":       "**+",
+
+		"来点中文试试":               "来点中文试诖",
+		"中cZ英ZZ文zZ混9zZ9杂99进z位": "中dA英AA文aA混0aA0杂00进a位",
+	})
+}