bbobco-TestCollatz.c++

// --------------------------------
// projects/collatz/TestCollatz.c++
// Copyright (C) 2013
// Glenn P. Downing
// --------------------------------

/*
To test the program:
% ls -al /usr/include/gtest/
...
gtest.h
...

% locate libgtest.a
/usr/lib/libgtest.a

% locate libpthread.a
/usr/lib/x86_64-linux-gnu/libpthread.a
/usr/lib32/libpthread.a

% locate libgtest_main.a
/usr/lib/libgtest_main.a

% g++ -pedantic -std=c++0x -Wall Collatz.c++ TestCollatz.c++ -o TestCollatz -lgtest -lpthread -lgtest_main

% valgrind TestCollatz > TestCollatz.out
*/

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

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

#include "gtest/gtest.h"

#include "Collatz.h"

// -----------
// TestCollatz
// -----------

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

TEST(CollatzRead, initialTEst) {
    std::istringstream r("1 10\n");
    int i;
    int j;
    const bool b = collatz_read(r, i, j);
    ASSERT_TRUE(b == true);
    ASSERT_TRUE(i == 1);
    ASSERT_TRUE(j == 10);}
    
TEST(CollatzRead, switchedInput) {
    std::istringstream r("10 1\n");
    int i;
    int j;
    const bool b = collatz_read(r, i, j);
    ASSERT_TRUE(b == true);
    ASSERT_TRUE(i == 10);
    ASSERT_TRUE(j == 1);}
TEST(CollatzRead, sameInput) {
    std::istringstream r("5 5\n");
    int i;
    int j;
    const bool b = collatz_read(r, i, j);
    ASSERT_TRUE(b == true);
    ASSERT_TRUE(i == 5);
    ASSERT_TRUE(j == 5);
    ASSERT_TRUE(i == j);}
TEST(CollatzRead, biggerInput) {
    std::istringstream r("5000 10000\n");
    int i;
    int j;
    const bool b = collatz_read(r, i, j);
    ASSERT_TRUE(b == true);
    ASSERT_TRUE(i == 5000);
    ASSERT_TRUE(j == 10000);
    }



// ----
// eval
// ----

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

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

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

TEST(CollatzEval, eval_4) {
    const int v = collatz_eval(900, 1000);
    ASSERT_TRUE(v == 174);}
    
TEST(CollatzEval, eval_5) {
    const int v = collatz_eval(1000, 900);
    ASSERT_TRUE(v == 174);}  
    
TEST(CollatzEval, eval_6) {
    const int v = collatz_eval(999999, 999990);
    ASSERT_TRUE(v == 259);}   
    
TEST(CollatzEval, eval_7) {
    const int v = collatz_eval(10, 25);
    ASSERT_TRUE(v == 21);}  

// -----
// print
// -----

TEST(Collatzprint, defaultprint) {
    std::ostringstream w;
    collatz_print(w, 1, 10, 20);
    ASSERT_TRUE(w.str() == "1 10 20\n");}

TEST(Collatzprint, simpleprint) {
    std::ostringstream w;
    collatz_print(w, 1, 2, 3);
    ASSERT_TRUE(w.str() == "1 2 3\n");}
    
TEST(Collatzprint, reversedSimpleprint) {
    std::ostringstream w;
    collatz_print(w, 3, 2, 1);
    ASSERT_TRUE(w.str() == "3 2 1\n");}
    
TEST(Collatzprint, bigNumbers) {
    std::ostringstream w;
    collatz_print(w, 12345, 98765, 43210);
    ASSERT_TRUE(w.str() == "12345 98765 43210\n");}

// -----
// solve
// -----

TEST(Collatz, solve) {
    std::istringstream r("1 10\n100 200\n201 210\n900 1000\n");
    std::ostringstream w;
    collatz_solve(r, w);
    ASSERT_TRUE(w.str() == "1 10 20\n100 200 125\n201 210 89\n900 1000 174\n");}
    
 TEST(Collatz, solve2) {
    std::istringstream r("3 10\n");
    std::ostringstream w;
    collatz_solve(r, w);
    ASSERT_TRUE(w.str() == "3 10 20\n");}

TEST(Collatz, solve3) {
    std::istringstream r("8239 2971\n");
    std::ostringstream w;
    collatz_solve(r, w);
    ASSERT_TRUE(w.str() == "8239 2971 262\n");}
    
TEST(Collatz, solve4) {
    std::istringstream r("7639 11696\n3427 1280\n");
    std::ostringstream w;
    collatz_solve(r, w);
    ASSERT_TRUE(w.str() == "7639 11696 268\n3427 1280 217\n");}