From 884943251b16d3e34901a6533944e6b78ef8eb03 Mon Sep 17 00:00:00 2001
From: Pierluigi Taddei <pierluigi.taddei@gmail.com>
Date: Mon, 12 Sep 2016 23:13:13 +0200
Subject: Tests: Add test for our strverscmp implementation

Cover typical examples and the ordering defined by the `strverscmp(3)`
man page.
---
 Tests/CMakeLib/testSystemTools.cxx | 72 +++++++++++++++++++++++++++++++++++---
 1 file changed, 68 insertions(+), 4 deletions(-)

diff --git a/Tests/CMakeLib/testSystemTools.cxx b/Tests/CMakeLib/testSystemTools.cxx
index e834b93..5b5c8d2 100644
--- a/Tests/CMakeLib/testSystemTools.cxx
+++ b/Tests/CMakeLib/testSystemTools.cxx
@@ -19,6 +19,13 @@
   std::cout << "FAILED: " << (m) << "\n";                                     \
   failed = 1
 
+#define cmAssert(exp, m)                                                      \
+  if ((exp)) {                                                                \
+    cmPassed(m);                                                              \
+  } else {                                                                    \
+    cmFailed(m);                                                              \
+  }
+
 int testSystemTools(int /*unused*/, char* /*unused*/ [])
 {
   int failed = 0;
@@ -26,10 +33,67 @@ int testSystemTools(int /*unused*/, char* /*unused*/ [])
   // Test cmSystemTools::UpperCase
   std::string str = "abc";
   std::string strupper = "ABC";
-  if (cmSystemTools::UpperCase(str) == strupper) {
-    cmPassed("cmSystemTools::UpperCase is working");
-  } else {
-    cmFailed("cmSystemTools::UpperCase is working");
+  cmAssert(cmSystemTools::UpperCase(str) == strupper,
+           "cmSystemTools::UpperCase");
+
+  // ----------------------------------------------------------------------
+  // Test cmSystemTools::strverscmp
+  cmAssert(cmSystemTools::strverscmp("", "") == 0, "strverscmp empty string");
+  cmAssert(cmSystemTools::strverscmp("abc", "") > 0,
+           "strverscmp string vs empty string");
+  cmAssert(cmSystemTools::strverscmp("abc", "abc") == 0,
+           "strverscmp same string");
+  cmAssert(cmSystemTools::strverscmp("abd", "abc") > 0,
+           "strverscmp character string");
+  cmAssert(cmSystemTools::strverscmp("abc", "abd") < 0,
+           "strverscmp symmetric");
+  cmAssert(cmSystemTools::strverscmp("12345", "12344") > 0,
+           "strverscmp natural numbers");
+  cmAssert(cmSystemTools::strverscmp("100", "99") > 0,
+           "strverscmp natural numbers different digits");
+  cmAssert(cmSystemTools::strverscmp("12345", "00345") > 0,
+           "strverscmp natural against decimal (same length)");
+  cmAssert(cmSystemTools::strverscmp("99999999999999", "99999999999991") > 0,
+           "strverscmp natural overflow");
+  cmAssert(cmSystemTools::strverscmp("00000000000009", "00000000000001") > 0,
+           "strverscmp deciaml precision");
+  cmAssert(cmSystemTools::strverscmp("a.b.c.0", "a.b.c.000") > 0,
+           "strverscmp multiple zeros");
+  cmAssert(cmSystemTools::strverscmp("lib_1.2_10", "lib_1.2_2") > 0,
+           "strverscmp last number ");
+  cmAssert(cmSystemTools::strverscmp("12lib", "2lib") > 0,
+           "strverscmp first number ");
+  cmAssert(cmSystemTools::strverscmp("02lib", "002lib") > 0,
+           "strverscmp first number decimal ");
+  cmAssert(cmSystemTools::strverscmp("10", "9a") > 0,
+           "strverscmp letter filler ");
+  cmAssert(cmSystemTools::strverscmp("000", "0001") > 0,
+           "strverscmp zero and leading zeros  ");
+
+  // test sorting using standard strvercmp input
+  std::vector<std::string> testString;
+  testString.push_back("000");
+  testString.push_back("00");
+  testString.push_back("01");
+  testString.push_back("010");
+  testString.push_back("09");
+  testString.push_back("0");
+  testString.push_back("1");
+  testString.push_back("9");
+  testString.push_back("10");
+
+  // test global ordering of input strings
+  for (size_t i = 0; i < testString.size() - 1; i++) {
+    for (size_t j = i + 1; j < testString.size(); j++) {
+      if (cmSystemTools::strverscmp(testString[i], testString[j]) >= 0) {
+        cmFailed("cmSystemTools::strverscmp error in comparing strings " +
+                 testString[i] + " " + testString[j]);
+      }
+    }
+  }
+
+  if (!failed) {
+    cmPassed("cmSystemTools::strverscmp working");
   }
   return failed;
 }
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