Revert local testing, add note

synth/testing_harness/mysql/README.md

@@ -1,11 +1,17 @@
 Integration Tests for MySql
 ====================================
 
-This is an integration test that validates the synth generate and synth import commands for MySql on a Debian flavored 
+This is an integration test that validates the synth generate and synth import commands for MySql on a Debian flavored
 OS. The models in hospital_master are used as a known "golden" set to validate against. The *.sql scripts generate the
 schema and test data within the database.
 
-# Requirements:
+## Note if running locally on Mac OS
+
+`./e2e.sh` assumes the use of the GNU variant of `grep`, specifically in its use of `-P` for PCRE flavored regex.
+You will need to run `brew install grep`, and then alter the script to use `ggrep` command instead of the built-in BSD `grep`.
+
+# Requirements
+
 - Docker
 - jq
 

synth/testing_harness/mysql/e2e.sh

@@ -85,7 +85,7 @@ function test-warning() {
 
   docker exec -i $NAME $SCHEME -h 127.0.0.1 -u root --password=$PASSWORD -P 3306 "test_db" <"$folder/schema.sql"
   output=$($SYNTH generate --size 10 --to mysql://root:${PASSWORD}@localhost:${PORT}/test_db "$folder" 2>&1)
-  warnings=$(echo "$output" | grep "WARN" | ggrep -Po "(?<=\]\s).*$")
+  warnings=$(echo "$output" | grep "WARN" | grep -Po "(?<=\]\s).*$")
 
   if [ -z "$warnings" ]; then
     echo -e "${ERROR}[$folder] did not produce any warnings${NC}"