Add syntax tests to augment the test coverage of

libsolidity/parsing/Scanner.cpp and libsolidity/parsing/Scanner.h
Fix #4627 and PR #5003.

- Add multiline comment test
- Add upper case hex literal test
- Add test for unicode escapes
- Add test for strings with escaped newlines
- Add test for string escapes
- Add test for strings that do not terminate before end of file
- Add test for unterminated blocks

1 files changed, 7 insertions, 0 deletions

diff --git a/test/libsolidity/syntaxTests/string/string_escapes.sol b/test/libsolidity/syntaxTests/string/string_escapes.sol
new file mode 100644
index 00000000..51b90d73
--- /dev/null
+++ b/test/libsolidity/syntaxTests/string/string_escapes.sol
@@ -0,0 +1,7 @@
+contract test {
+    function f() public pure returns (bytes32) {
+        bytes32 escapeCharacters = "\t\b\n\r\f\'\"\\\b";
+        return escapeCharacters;
+    }
+}
+// ----