[med-svn] [libgtextutils] 35/83: Added Tuple-Parser unit-tester.

[Charles Plessy]

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plessy pushed a commit to branch debian/unstable
in repository libgtextutils.

commit abe3d35edfeab2b39321918243a4ba1030d5fda7
Author: A. Gordon <gordon at cshl.edu>
Date:   Mon Apr 6 00:23:50 2009 -0400

    Added Tuple-Parser unit-tester.
---
 tests/Makefile.am           |   2 +
 tests/test_tuple_parser.cpp | 163 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 165 insertions(+)

diff --git a/tests/Makefile.am b/tests/Makefile.am
index 772e623..efeb0e3 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -20,6 +20,7 @@ check_PROGRAMS = test_container_join \
 		 test_fd_outbuf \
 		 test_fd_inbuf \
 		 test_in_out_buf \
+		 test_tuple_parser \
 		 test_pipe_fitter
 
 TESTS = $(check_PROGRAMS)
@@ -36,3 +37,4 @@ test_fd_outbuf_SOURCES = test_fd_outbuf.cpp
 test_fd_inbuf_SOURCES = test_fd_inbuf.cpp
 test_in_out_buf_SOURCES = test_in_out_buf.cpp
 test_pipe_fitter_SOURCES = test_pipe_fitter.c
+test_tuple_parser_SOURCES = test_tuple_parser.cpp
diff --git a/tests/test_tuple_parser.cpp b/tests/test_tuple_parser.cpp
new file mode 100644
index 0000000..3d0525c
--- /dev/null
+++ b/tests/test_tuple_parser.cpp
@@ -0,0 +1,163 @@
+#include <err.h>
+
+#include <cmath>
+#include <limits>
+#include <iostream>
+#include <sstream>
+#include <string>
+#include <utility>
+
+#include <tr1/tuple>
+#include <tr1/type_traits>
+
+#include "gtextutils/tuple_parser.h"
+#include "tests_assertion.h"
+
+using namespace std;
+using namespace std::tr1;
+
+
+// Helper function to safely compare doubles
+bool doubles_are_equal ( double a, double b )
+{
+	return std::abs(a-b) <= numeric_limits<double>::epsilon() ;
+}
+
+/*
+	Test most basic TupleParser usage.
+
+	Parser expects three values: int, string, double.
+	
+	The int is expected to be on column 4.
+	The string is expected on column 3,
+	The double is expected on column 1.
+
+	After parsing, validate extracted values.
+*/
+void test_parser1()
+{
+	Tuple_Parser<int,std::string,double> parser(4,3,1);
+
+	istringstream is ( "3.14 DUMMY HELLOWORLD 42" ) ;
+
+	is >> parser ;
+
+	int a = get<0>(parser);
+	ASSERT ( a == 42 ) ;
+
+	std::string b = get<1>(parser);
+	ASSERT ( b == "HELLOWORLD" ) ;
+
+	double c = get<2>(parser);
+	ASSERT ( doubles_are_equal (c, 3.14) ) ;
+}
+
+/*
+	Test column collusion detection.
+
+	Parser expects three values: int, string, double.
+
+	Two fields use the same column number.
+	An exception should be thrown.
+*/
+void test_parser_column_collusion()
+{
+	try {
+		Tuple_Parser<int,std::string,double> parser(1,3,1);
+
+		//We should not get here
+		ASSERT ( ! "Column collusion (1) not detected." ) ;
+	} catch ( std::invalid_argument &ex ) {
+		//fine, exception was thrown. we can continue
+	}
+}
+
+/*
+	Test max. column number overflow
+*/
+void test_parser_column_number_overflow()
+{
+	try {
+		Tuple_Parser<int,std::string,double> parser(1,20000,1);
+
+		//We should not get here
+		ASSERT ( ! "Max. Column number overflow not detected." ) ;
+	} catch ( std::length_error &ex ) {
+		//fine, exception was thrown. we can continue
+	}
+}
+
+
+/*	
+	Test parsing error
+
+	Parser expects three values: int, string, double.
+	
+	The int is expected to be on column 4.
+	The string is expected on column 3,
+	The double is expected on column 1.
+
+	The 4th column doesn't contain a valid integer, and should fail.
+*/
+void test_parser_parsing_error()
+{
+	Tuple_Parser<int,std::string,double> parser(4,3,1);
+
+	istringstream is ( "3.14 DUMMY HELLOWORLD i42" ) ;
+
+	try {
+		is >> parser ;
+
+		//We should not get here
+		ASSERT ( ! "Invalid input not detected." ) ;
+	} catch ( tuple_parser_parsing_error &ex ) {
+		//exception was thrown. valid reported errornous columns
+		ASSERT ( ex.column() == 4 ) ;
+	}
+}
+
+/*	
+	Test premature-end-of-line
+
+	Parser expects three values: int, string, double.
+	
+	The int is expected to be on column 4.
+	The string is expected on column 3,
+	The double is expected on column 1.
+
+	The input contains only 2 columns (instead of expected 4)
+*/
+void test_parser_premature_eol()
+{
+	Tuple_Parser<int,std::string,double> parser(4,3,1);
+
+	istringstream is ( "3.14 DUMMY" ) ;
+
+	try {
+		is >> parser ;
+
+		//We should not get here
+		ASSERT ( ! "premature-end-of-line not detected." ) ;
+	} catch ( tuple_parser_premature_end_of_line &ex ) {
+		//exception was thrown. valid reported errornous columns
+		ASSERT ( ex.expected_columns() == 4 ) ;
+
+		ASSERT ( ex.actual_columns() == 2 ) ;
+	}
+}
+
+
+int main()
+{
+	test_parser1();
+
+	test_parser_column_collusion();
+
+	test_parser_column_number_overflow();
+
+	test_parser_parsing_error();
+
+	test_parser_premature_eol();
+
+	return 0;
+}

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