message: Add unit test for IsWindowsAbsolutePath
diff: #include <sstream>
  #include <unordered_set>
  #include <vector>
  +#include <iostream>
  struct CompileCommandsEntry {
  std::string directory;
  @@ -1480,6 +1481,22 @@ TEST_SUITE("Project") {
  }
  }
  + TEST_CASE("IsWindowsAbsolutePath works correctly") {
  + REQUIRE(IsWindowsAbsolutePath("C:/Users/projects/") == true);
  + REQUIRE(IsWindowsAbsolutePath("C:/Users/projects") == true);
  + REQUIRE(IsWindowsAbsolutePath("C:/Users/projects") == true);
  + REQUIRE(IsWindowsAbsolutePath("C:\\Users\\projects") == true);
  + REQUIRE(IsWindowsAbsolutePath("C:\\\\Users\\\\projects") == true);
  + REQUIRE(IsWindowsAbsolutePath("c:\\\\Users\\\\projects") == true);
  + REQUIRE(IsWindowsAbsolutePath("A:\\\\Users\\\\projects") == true);
  +
  + REQUIRE(IsWindowsAbsolutePath("C:/") == false);
  + REQUIRE(IsWindowsAbsolutePath("../abc/test") == false);
  + REQUIRE(IsWindowsAbsolutePath("5:/test") == false);
  + REQUIRE(IsWindowsAbsolutePath("cquery/project/file.cc") == false);
  + REQUIRE(IsWindowsAbsolutePath("") == false);
  + }
  +
  TEST_CASE("Entry inference prefers same file endings") {
  Project p;
  {
  