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// A sample program demonstrating using Google C++ testing framework.

// This sample shows how to write a simple unit test for a function,
// using Google C++ testing framework.
//
// Writing a unit test using Google C++ testing framework is easy as 1-2-3:


// Step 1. Include necessary header files such that the stuff your
// test logic needs is declared.
//
// Don't forget gtest.h, which declares the testing framework.

#include "gtest/gtest.h"
#include "lastseen.h"

namespace {

// Step 2. Use the TEST macro to define your tests.
//
// TEST has two parameters: the test case name and the test name.
// After using the macro, you should define your test logic between a
// pair of braces.  You can use a bunch of macros to indicate the
// success or failure of a test.  EXPECT_TRUE and EXPECT_EQ are
// examples of such macros.  For a complete list, see gtest.h.
//
// <TechnicalDetails>
//
// In Google Test, tests are grouped into test cases.  This is how we
// keep test code organized.  You should put logically related tests
// into the same test case.
//
// The test case name and the test name should both be valid C++
// identifiers.  And you should not use underscore (_) in the names.
//
// Google Test guarantees that each test you define is run exactly
// once, but it makes no guarantee on the order the tests are
// executed.  Therefore, you should write your tests in such a way
// that their results don't depend on their order.
//
// </TechnicalDetails>

TEST(LastSeenTest, basic) {
    LastSeen one(1);

    EXPECT_FALSE(one.seen_before(0));
    EXPECT_TRUE(one.seen_before(0));
    EXPECT_TRUE(one.seen_before(0));
    EXPECT_TRUE(one.seen_before(0));
    EXPECT_FALSE(one.seen_before(1));
    EXPECT_TRUE(one.seen_before(1));
}

TEST(LastSeenTest, Deep2) {
    LastSeen two(2);

    EXPECT_FALSE(two.seen_before(0));
    EXPECT_FALSE(two.seen_before(1));
    EXPECT_TRUE(two.seen_before(0));
    EXPECT_TRUE(two.seen_before(1));
}

}  // namespace

// Step 3. Call RUN_ALL_TESTS() in main().
//
// We do this by linking in src/gtest_main.cc file, which consists of
// a main() function which calls RUN_ALL_TESTS() for us.
//
// This runs all the tests you've defined, prints the result, and
// returns 0 if successful, or 1 otherwise.
//
// Did you notice that we didn't register the tests?  The
// RUN_ALL_TESTS() macro magically knows about all the tests we
// defined.  Isn't this convenient?