feat: creating new mx_ suite of macros!

also adding new mx_getcode macro

tests/base/mp_webin.test.sas

@@ -0,0 +1,39 @@
+/**
+  @file
+  @brief Testing mp_webin macro
+
+  <h4> SAS Macros </h4>
+  @li mp_webin.sas
+  @li mp_assert.sas
+
+**/
+
+/* force SAS9 tests as we don't have a valid URI available */
+%macro mf_getplatform();
+  SAS9
+%mend mf_getplatform;
+
+/* TEST 1 */
+%let _webin_file_count=1;
+%let _webin_filename=test;
+%mp_webin()
+
+%mp_assert(
+  iftrue=(
+    %symexist(_WEBIN_FILEREF1)
+  ),
+  desc=Checking if the macvar exists,
+  outds=work.test_results
+)
+
+/* TEST 2 */
+%global _WEBIN_FILENAME1;
+%mp_assert(
+  iftrue=(
+    %str(&_WEBIN_FILENAME1)=%str(test)
+  ),
+  desc=Checking if the macvar exists,
+  outds=work.test_results
+)
+
+