feat: new mp_hashdirectory() macro and associated test. Closes #312

tests/base/mp_hashdirectory.test.sas

@@ -0,0 +1,133 @@
+/**
+  @file
+  @brief Testing mp_hashdirectory.sas macro
+
+
+  <h4> SAS Macros </h4>
+  @li mf_mkdir.sas
+  @li mf_nobs.sas
+  @li mp_assert.sas
+  @li mp_assertscope.sas
+  @li mp_hashdirectory.sas
+
+**/
+
+/* set up a directory to hash */
+%let fpath=%sysfunc(pathname(work))/testdir;
+
+%mf_mkdir(&fpath)
+%mf_mkdir(&fpath/sub1)
+%mf_mkdir(&fpath/sub2)
+%mf_mkdir(&fpath/sub1/subsub)
+
+/* note - the path in the file means the hash is different in each run */
+%macro makefile(path,name);
+  data _null_;
+    file "&path/&name" termstr=lf;
+    put "This file is located at:";
+    put "&path";
+    put "and it is called:";
+    put "&name";
+  run;
+%mend makefile;
+
+%macro spawner(path);
+  %do x=1 %to 5;
+    %makefile(&path,file&x..txt)
+  %end;
+%mend spawner;
+
+%spawner(&fpath)
+%spawner(&fpath/sub1)
+%spawner(&fpath/sub1/subsub)
+
+
+%mp_assertscope(SNAPSHOT)
+%mp_hashdirectory(&fpath,outds=work.hashes,maxdepth=MAX)
+%mp_assertscope(COMPARE)
+
+%mp_assert(
+  iftrue=(&syscc=0),
+  desc=No errors,
+  outds=work.test_results
+)
+
+%mp_assert(
+  iftrue=(%mf_nobs(work.hashes)=19),
+  desc=record created for each entry,
+  outds=work.test_results
+)
+
+proc sql;
+select count(*) into: misscheck
+  from work.hashes
+  where file_hash is missing;
+
+%mp_assert(
+  iftrue=(&misscheck=1),
+  desc=Only one missing hash - the empty directory,
+  outds=work.test_results
+)
+
+data _null_;
+  set work.hashes;
+  if directory=file_path then call symputx('tophash',file_hash);
+run;
+
+%mp_assert(
+  iftrue=(%length(&tophash)=32),
+  desc=ensure valid top level hash created,
+  outds=work.test_results
+)
+
+/* now change a file and re-hash */
+data _null_;
+  file "&fpath/sub1/subsub/file1.txt" termstr=lf;
+  put "This file has changed!";
+run;
+
+%mp_hashdirectory(&fpath,outds=work.hashes2,maxdepth=MAX)
+
+data _null_;
+  set work.hashes2;
+  if directory=file_path then call symputx('tophash2',file_hash);
+run;
+
+%mp_assert(
+  iftrue=(&tophash ne &tophash2),
+  desc=ensure the changing of the hash results in a new value,
+  outds=work.test_results
+)
+
+/* now change it back and see if it matches */
+data _null_;
+  file "&fpath/sub1/subsub/file1.txt" termstr=lf;
+    put "This file is located at:";
+    put "&fpath/sub1/subsub";
+    put "and it is called:";
+    put "file1.txt";
+  run;
+run;
+
+%mp_hashdirectory(&fpath,outds=work.hashes3,maxdepth=MAX)
+
+data _null_;
+  set work.hashes3;
+  if directory=file_path then call symputx('tophash3',file_hash);
+run;
+
+%mp_assert(
+  iftrue=(&tophash=&tophash3),
+  desc=ensure the same files result in the same hash,
+  outds=work.test_results
+)
+
+/* dump contents for debugging */
+data _null_;
+  set work.hashes;
+  put file_hash file_path;
+run;
+data _null_;
+  set work.hashes2;
+  put file_hash file_path;
+run;