add tests

Author: tgauth

tree-sitter-dscexpression/corpus/invalid_expressions.txt

@@ -124,3 +124,17 @@ Invalid float argument
           (ERROR
             (functionName)
             (memberName)))))
+
+=====
+Plus-sign number argument
+=====
+[myFunction(+1)]
+---
+
+    (statement
+      (expression
+        (function
+          (functionName)
+          (ERROR
+            (UNEXPECTED '+')
+            (memberName)))))

tree-sitter-dscexpression/corpus/valid_expressions.txt

@@ -127,3 +127,16 @@ Quotes float input
           (functionName)
           (arguments
               (string)))))
+
+=====
+Float input starting with decimal
+=====
+[myFunction(.1)]
+---
+
+    (statement
+      (expression
+        (function
+          (functionName)
+          (arguments
+              (number)))))