feat: snowflake support in mm_assigndirectlib

tests/sas9only/mm_assigndirectlib.test.sas

@@ -0,0 +1,30 @@
+/**
+  @file
+  @brief Testing mm_assigndirectlib macro
+  @details  A valid library must first be configured in metadata.
+  To test success, also define a table for which we can test the existence.
+  This is a unit test - not part of the full test run, as it would be a
+  lot of overhead to create an external DB and metadata setup each time.
+
+  <h4> SAS Macros </h4>
+  @li mf_existds.sas
+  @li mp_assert.sas
+  @li mp_assertscope.sas
+  @li mm_assigndirectlib.sas
+
+**/
+
+%let runtest=0;
+%let libref=XXX;
+%let ds=XXXX;
+
+
+%mp_assertscope(SNAPSHOT)
+%mm_assigndirectlib(&libref)
+%mp_assertscope(COMPARE)
+
+
+%mp_assert(
+  iftrue=(&runtest=1 and %mf_existds(&libref..&ds)),
+  desc=Check if &libref..&ds exists
+)