util/m5/src/command/sum.test.cc

   1 /*
   2  * Copyright 2020 Google Inc.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met: redistributions of source code must retain the above copyright
   7  * notice, this list of conditions and the following disclaimer;
   8  * redistributions in binary form must reproduce the above copyright
   9  * notice, this list of conditions and the following disclaimer in the
  10  * documentation and/or other materials provided with the distribution;
  11  * neither the name of the copyright holders nor the names of its
  12  * contributors may be used to endorse or promote products derived from
  13  * this software without specific prior written permission.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  16  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  17  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  18  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  19  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  21  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  25  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #include <gtest/gtest.h>
  29
  30 #include <sstream>
  31
  32 #include "args.hh"
  33 #include "command.hh"
  34 #include "dispatch_table.hh"
  35
  36 unsigned test_a, test_b, test_c, test_d, test_e, test_f;
  37 unsigned test_result;
  38
  39 unsigned
  40 test_m5_sum(unsigned a, unsigned b, unsigned c,
  41             unsigned d, unsigned e, unsigned f)
  42 {
  43     test_a = a;
  44     test_b = b;
  45     test_c = c;
  46     test_d = d;
  47     test_e = e;
  48     test_f = f;
  49
  50     return test_result;
  51 }
  52
  53 void
  54 check_args(unsigned a, unsigned b, unsigned c,
  55            unsigned d, unsigned e, unsigned f)
  56 {
  57     EXPECT_EQ(test_a, a);
  58     EXPECT_EQ(test_b, b);
  59     EXPECT_EQ(test_c, c);
  60     EXPECT_EQ(test_d, d);
  61     EXPECT_EQ(test_e, e);
  62     EXPECT_EQ(test_f, f);
  63 }
  64
  65 DispatchTable dt = { .m5_sum = &test_m5_sum };
  66
  67 std::string cout_output;
  68
  69 bool
  70 run(std::initializer_list<std::string> arg_args)
  71 {
  72     Args args(arg_args);
  73
  74     // Redirect cout into a stringstream.
  75     std::stringstream buffer;
  76     std::streambuf *orig = std::cout.rdbuf(buffer.rdbuf());
  77
  78     bool res = Command::run(dt, args);
  79
  80     // Capture the contents of the stringstream and restore cout.
  81     cout_output = buffer.str();
  82     std::cout.rdbuf(orig);
  83
  84     return res;
  85 }
  86
  87 TEST(Sum, Arguments)
  88 {
  89     // Called with no arguments.
  90     EXPECT_FALSE(run({"sum"}));
  91
  92     // Called with one argument.
  93     EXPECT_FALSE(run({"sum", "1"}));
  94
  95     // Called with two arguments.
  96     test_result = 42;
  97     EXPECT_TRUE(run({"sum", "1", "2"}));
  98     check_args(1, 2, 0, 0, 0, 0);
  99     EXPECT_EQ(cout_output, "Sum is 42.\n");
 100
 101     // Call with all arguments.
 102     test_result = 314159;
 103     EXPECT_TRUE(run({"sum", "6", "5", "4", "3", "2", "1"}));
 104     check_args(6, 5, 4, 3, 2, 1);
 105     EXPECT_EQ(cout_output, "Sum is 314159.\n");
 106 }