Add multiline tests

tests/config/multiline-errors.conf

@@ -0,0 +1,20 @@
+# Careful when modifying this file. Line numbers are part of the test.
+
+multiline = \
+    one \
+    two \
+    three
+
+# Line numbers reported in errors should match the actual line numbers of the source file
+# even after multi-line configs. Any errors reported should use the line number of the
+# first line of any multi-line config.
+
+this \
+ should \
+ cause \
+ error \
+ on \
+ line \
+ 12
+
+# A config file cannot end with a bashslash because we are expecting another line! Even in a comment! \

tests/parse/main.cpp

@@ -302,6 +302,17 @@ int main(int argc, char** argv, char** envp) {
         EXPECT(ERRORS2.error, true);
         const auto ERRORSTR2 = std::string{ERRORS2.getError()};
         EXPECT(std::count(ERRORSTR2.begin(), ERRORSTR2.end(), '\n'), 9 - 1);
+
+        Hyprlang::CConfig multilineErrorConfig("./config/multiline-errors.conf", {.verifyOnly = true, .throwAllErrors = true});
+        multilineErrorConfig.commence();
+        const auto ERRORS3 = multilineErrorConfig.parse();
+        EXPECT(ERRORS3.error, true);
+        const auto ERRORSTR3 = std::string{ERRORS3.getError()};
+
+        // Error on line 12
+        EXPECT(ERRORSTR3.contains("12"), true);
+        // Backslash at end of file
+        EXPECT(ERRORSTR3.contains("backslash"), true);
     } catch (const char* e) {
         std::cout << Colors::RED << "Error: " << Colors::RESET << e << "\n";
         return 1;