fix: rebuilding mp_searchdata into data step to avoid SQL warning. Added test and refreshed docs. Closes #108

tests/crossplatform/mp_searchdata.test.sas

@@ -0,0 +1,29 @@
+/**
+  @file
+  @brief Testing mp_searchdata.sas
+
+  <h4> SAS Macros </h4>
+  @li mp_searchdata.sas
+  @li mp_assert.sas
+
+
+**/
+
+/** Test 1 - generic useage */
+
+%mp_searchdata(lib=sashelp, ds=class, string=a)
+%mp_assert(
+  iftrue=(&syscc=0),
+  desc=No errors in regular usage,
+  outds=work.test_results
+)
+
+/** Test 2 - with obs issue  */
+
+%mp_searchdata(lib=sashelp, ds=class, string=l,outobs=5)
+
+%mp_assert(
+  iftrue=("&SYSWARNINGTEXT" = ""),
+  desc=Ensuring WARN status is clean,
+  outds=work.test_results
+)