tz2853-TestCollatz.c++

// --------------------------------
// projects/collatz/TestCollatz.c++
// Copyright (C) 2016
// Glenn P. Downing
// --------------------------------

// https://code.google.com/p/googletest/wiki/V1_7_Primer#Basic_Assertions

// --------
// includes
// --------

#include <iostream> // cout, endl
#include <sstream>  // istringtstream, ostringstream
#include <string>   // string
#include <utility>  // pair

#include "gtest/gtest.h"

#include "Collatz.h"

using namespace std;

// ----
// read
// ----

TEST(CollatzFixture, read_1) {
    istringstream r("1 10\n");
    int           i;
    int           j;
    const bool b = collatz_read(r, i, j);
    ASSERT_TRUE(b);
    ASSERT_EQ( 1, i);
    ASSERT_EQ(10, j);}

TEST(CollatzFixture, read_2){
    istringstream r("99 99\n");
    int           i;
    int           j;
    const bool b = collatz_read(r, i, j);
    ASSERT_TRUE(b);
    ASSERT_EQ(99, i);
    ASSERT_EQ(99, j);
}

TEST(CollatzFixture, read_3){
    istringstream r("999999 1\n");
    int           i;
    int           j;
    const bool b = collatz_read(r, i, j);
    ASSERT_TRUE(b);
    ASSERT_EQ(999999, i);
    ASSERT_EQ(1, j);
}
// ----
// eval
// ----

TEST(CollatzFixture, eval_1) {
    const int v = collatz_eval(1, 10);
    ASSERT_EQ(20, v);}

TEST(CollatzFixture, eval_2) {
    const int v = collatz_eval(100, 200);
    ASSERT_EQ(125, v);}

TEST(CollatzFixture, eval_3) {
    const int v = collatz_eval(201, 210);
    ASSERT_EQ(89, v);}

TEST(CollatzFixture, eval_4) {
    const int v = collatz_eval(900, 1000);
    ASSERT_EQ(174, v);}

TEST(CollatzFixture, eval_5) {
    const int v = collatz_eval(3333, 113382);
    ASSERT_EQ(354, v);}

TEST(CollatzFixture, eval_6) {
    const int v = collatz_eval(997024, 991940);
    ASSERT_EQ(365, v);}

TEST(CollatzFixture, eval_7) {
    const int v = collatz_eval(544040, 542960);
    ASSERT_EQ(359, v);}

TEST(CollatzFixture, eval_8) {
    const int v = collatz_eval(10, 10);
    ASSERT_EQ(7, v);}

TEST(CollatzFixture, eval_9) {
    const int v = collatz_eval(50, 90000);
    ASSERT_EQ(351, v);}
// -----
// print
// -----

TEST(CollatzFixture, print_1) {
    ostringstream w;
    collatz_print(w, 1, 10, 20);
    ASSERT_EQ("1 10 20\n", w.str());}

TEST(CollatzFixture, print_2) {
    ostringstream w;
    collatz_print(w, 900, 1000, 174);
    ASSERT_EQ("900 1000 174\n", w.str());}

TEST(CollatzFixture, print_3) {
    ostringstream w;
    collatz_print(w, 10, 10, 7);
    ASSERT_EQ("10 10 7\n", w.str());}

TEST(CollatzFixture, print_4) {
    ostringstream w;
    collatz_print(w, 10, 1, 20);
    ASSERT_EQ("10 1 20\n", w.str());}
// -----
// solve
// -----

TEST(CollatzFixture, solve_1) {
    istringstream r("1 10\n100 200\n201 210\n900 1000\n");
    ostringstream w;
    collatz_solve(r, w);
    ASSERT_EQ("1 10 20\n100 200 125\n201 210 89\n900 1000 174\n", w.str());}

TEST(CollatzFixture, solve_2) {
    istringstream r("200 1000\n555 99999\n111111 40000\n997376 997600\n");
    ostringstream w;
    collatz_solve(r, w);
    ASSERT_EQ("200 1000 179\n555 99999 351\n111111 40000 354\n997376 997600 321\n", w.str());}