Create xman375_TestCollatz.c++

xman375_TestCollatz.c++

@@ -0,0 +1,137 @@
+// --------------------------------
+// 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(Collatz, read) {
+    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);}
+
+// -----
+// cycle
+// -----
+
+TEST(Collatz, cycle_1)
+{
+  const int v = collatz_cycle(15);
+  ASSERT_TRUE(v==18);
+}
+
+TEST(Collatz, cycle_2)
+{
+  const int v = collatz_cycle(15);
+  ASSERT_TRUE(v==18);
+}
+
+TEST(Collatz, cycle_3)
+{
+  const int v = collatz_cycle(318974);
+  ASSERT_TRUE(v==1);
+}
+
+// -------
+// c_cycle
+// -------
+
+TEST(Collatz, c_cycle_1) {
+  int a[]={113, 51, 144};
+  const int v=collatz_c_cycle(4000, a, 2000);
+  ASSERT_TRUE(v==114);}
+
+TEST(Collatz, c_cycle_2) {
+  int a[]={88, 87};
+  const int v=collatz_c_cycle(11, a, 10);
+  ASSERT_TRUE(v==87);}
+
+TEST(Collatz, c_cycle_3) {
+  int a[]={113, 152, 139, 152, 258};
+  const int v=collatz_c_cycle(500008, a, 500007);
+  ASSERT_TRUE(v==152);}
+
+
+// ----
+// eval
+// ----
+
+TEST(Collatz, eval_1) {
+    const int v = collatz_eval(1, 10);
+    ASSERT_TRUE(v == 20);}
+
+TEST(Collatz, eval_2) {
+    const int v = collatz_eval(100, 200);
+    ASSERT_TRUE(v == 125);}
+
+TEST(Collatz, eval_3) {
+    const int v = collatz_eval(201, 210);
+    ASSERT_TRUE(v == 89);}
+
+TEST(Collatz, eval_4) {
+    const int v = collatz_eval(900, 1000);
+    ASSERT_TRUE(v == 174);}
+
+// -----
+// print
+// -----
+
+TEST(Collatz, print) {
+    std::ostringstream w;
+    collatz_print(w, 1, 10, 20);
+    ASSERT_TRUE(w.str() == "1 10 20\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");}