Google Testing Blog: TotT: Literate Testing With Matchers

TotT: Literate Testing With Matchers

Tuesday, September 29, 2009

By Zhanyong G. Mock Wan in Google Kirklandmatchersare predicates that know how to describe themselvesContainsRegex"Ahcho+!""Ahcho+!""Ahchoo!""Ahchoooo! Sorry.""Aha!"matcherslend themselves easily to an assertion style that resembles natural languages EXPECT_THAT(value, matcher);valuematcher #include <gmock/gmock.h>
using ::testing::Contains;
...
EXPECT_THAT(GetUserList(), Contains(admin_id));GetUserList()when an EXPECT_THAT assertion fails, it will print an informative message that includes the expression being validated, its value, and the property we expect it to have Value of: GetUserList()
Expected: contains "yoko"
  Actual: { "john", "paul", "george", "ringo" } std::vector<std::string> users = GetUserList();
EXPECT_TRUE(VectorContains(users, admin_id))
    << " GetUserList() returns " << users
    << " and admin_id is " << admin_id;http://code.google.com/p/googlemock/http://code.google.com/p/googlemock/wiki/CheatSheetToilet-friendly version