Add tests and test files with backslashes in INCLUDE paths.

opm/parser/eclipse/Parser/tests/ParserTests.cpp

@@ -292,6 +292,14 @@ BOOST_AUTO_TEST_CASE( PATHS_has_global_scope ) {
     BOOST_CHECK_THROW( parser.parseFile( "testdata/parser/PATHSInIncludeInvalid.data", ParseContext() ), std::invalid_argument );
 }
 
+BOOST_AUTO_TEST_CASE( PATHS_with_backslashes ) {
+    Parser parser;
+    ParseContext parseContext;
+
+    parseContext.update( ParseContext::PARSE_MISSING_INCLUDE , Opm::InputError::THROW_EXCEPTION);
+    parser.parseFile( "testdata/parser/PATHSWithBackslashes.data", parseContext );
+}
+
 BOOST_AUTO_TEST_CASE( handle_empty_title ) {
     const auto* input_deck = "RUNSPEC\n\n"
                              "TITLE\n\n"

testdata/parser/PATHSWithBackslashes.data

@@ -0,0 +1,7 @@
+INCLUDE
+ 'include\foobackslash.inc'
+/
+
+INCLUDE
+ '$FOOPATH\foo_target.inc'
+/

testdata/parser/include/foobackslash.inc

@@ -0,0 +1,3 @@
+PATHS
+ 'FOOPATH' 'include\foopath' /
+/