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EbnfCompareTest.cpp
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EbnfCompareTest.cpp
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// EbnfCompareTest.cpp --- comparison tests for ISO EBNF notation
// See ReadMe.txt and License.txt.
/////////////////////////////////////////////////////////////////////////
#include "EBNF.hpp"
#include <cstdio> // for std::puts
static int g_num_executions = 0; // number of test executions
static int g_num_failures = 0; // number of test failures
enum COMPARE_TEST_RETURN
{
TR_EQUAL = 0,
TR_LESS_THAN = -1,
TR_GREATER_THAN = 1,
TR_OTHER_ERROR = 2
};
struct COMPARE_TEST_ENTRY
{
int entry_number; // #
COMPARE_TEST_RETURN ret;
const char *input1;
const char *input2;
};
static const COMPARE_TEST_ENTRY g_test_entries[] =
{
{ 1, TR_EQUAL, "a = a;", "a = a;" },
{ 2, TR_LESS_THAN, "a = a;", "a = b;" },
{ 3, TR_LESS_THAN, "a = a;", "b = a;" },
{ 4, TR_EQUAL, "a = a | b;", "a = b | a;" },
{ 5, TR_EQUAL, "a = a | b | c;", "a = c | b | a;" },
{ 6, TR_GREATER_THAN, "a = a | b | c;", "a = b | b | a;" },
{ 7, TR_LESS_THAN, "a = a | b | b;", "a = c | b | a;" },
{ 8, TR_GREATER_THAN, "a = a;", "a = 'a';" },
{ 9, TR_LESS_THAN, "test = a;", "test1 = a;" },
{ 10, TR_EQUAL, "test = a;", "test = a | a;" },
{ 11, TR_EQUAL, "test = a | b;", "test = a | a | b;" },
{ 12, TR_EQUAL, "test = a | (b | c);", "test = a | b | c;" },
{ 13, TR_EQUAL, "test = a | (b, c);", "test = a | b, c;" },
{ 14, TR_GREATER_THAN, "expr = term, ('+' | '-'), expr;", "expr = term, '+' | '-', expr;" },
{ 15, TR_EQUAL, "expr = ((((a))));", "expr = a;" },
{ 16, TR_EQUAL, "d = (((a) | b) | c);", "d = a | b | c;" },
{ 17, TR_EQUAL, "d = (((a), b), c);", "d = a, b, c;" },
};
static EBNF::SeqAst *do_parse(const std::string& str)
{
using namespace EBNF;
StringScanner scanner(str);
AuxInfo aux;
TokenStream stream(scanner, aux);
if (stream.scan())
{
stream.fixup();
Parser parser(stream, aux);
if (parser.parse())
{
BaseAst *ast = parser.detach();
if (ast && ast->m_atype == ATYPE_SEQ)
{
SeqAst *seq = static_cast<SeqAst *>(ast);
return seq;
}
delete ast;
}
}
return NULL;
}
static COMPARE_TEST_RETURN just_do_it(const COMPARE_TEST_ENTRY *entry)
{
using namespace EBNF;
SeqAst *seq1 = do_parse(entry->input1);
SeqAst *seq2 = do_parse(entry->input2);
if (seq1 == NULL || seq2 == NULL)
{
delete seq1;
delete seq2;
return TR_OTHER_ERROR;
}
#ifndef NDEBUG
os_type os;
os << "seq1: ";
seq1->to_dbg(os);
os << "\n";
os << "seq2: ";
seq2->to_dbg(os);
os << "\n";
BaseAst *s1 = seq1->sorted_clone();
BaseAst *s2 = seq2->sorted_clone();
os << "s1: ";
s1->to_dbg(os);
os << "\n";
os << "s2: ";
s2->to_dbg(os);
os << "\n";
delete s1;
delete s2;
puts(os.str().c_str());
#endif
COMPARE_TEST_RETURN ret;
if (ast_equal(seq1, seq2))
ret = TR_EQUAL;
else if (ast_less_than(seq1, seq2))
ret = TR_LESS_THAN;
else
ret = TR_GREATER_THAN;
delete seq1;
delete seq2;
return ret;
}
static bool do_test_entry(const COMPARE_TEST_ENTRY *entry)
{
bool failed = false;
COMPARE_TEST_RETURN ret = just_do_it(entry);
if (ret != entry->ret)
{
printf("#%d: FAILED: ret expected %d, got %d\n", entry->entry_number, entry->ret, ret);
++g_num_failures;
failed = true;
}
++g_num_executions;
return !failed;
}
int main(void)
{
size_t count = sizeof(g_test_entries) / sizeof(g_test_entries[0]);
for (size_t i = 0; i < count; ++i)
{
do_test_entry(&g_test_entries[i]);
}
printf("executions %d, failures %d\n", g_num_executions, g_num_failures);
if (g_num_failures == 0)
printf("SUCCESS!\n");
assert(EBNF::BaseAst::alive_count() == 0);
return g_num_failures;
}