[nongnu] elpa/emacsql 1b5891298a 255/427: Officially add MySQL to unit testing.

[ELPA Syncer]

branch: elpa/emacsql
commit 1b5891298ae5f9b9146ef717d9101f85879f0624
Author: Christopher Wellons <wellons@nullprogram.com>
Commit: Christopher Wellons <wellons@nullprogram.com>

    Officially add MySQL to unit testing.
---
 README.md                       | 9 +++++++--
 tests/emacsql-external-tests.el | 6 +++++-
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index 28e6cdeb6c..e7381553ba 100644
--- a/README.md
+++ b/README.md
@@ -310,8 +310,13 @@ and unit testing.
     make test
 
 If the environment variable `PGDATABASE` is present then the unit
-tests will also be run with PostgreSQL in addition to SQLite. Also
-provide `PGHOST`, `PGPORT`, and `PGUSER` if needed.
+tests will also be run with PostgreSQL. Also provide `PGHOST`,
+`PGPORT`, and `PGUSER` if needed.
+
+If the environment variable `MYSQL_DBNAME` is present then the unit
+tests will also be run with MySQL in the named database. Note that
+this is not an official MySQL variable, just something made up for
+Emacsql.
 
 ### Creating a New Front-end
 
diff --git a/tests/emacsql-external-tests.el b/tests/emacsql-external-tests.el
index 1438a219bc..8e3ef5d793 100644
--- a/tests/emacsql-external-tests.el
+++ b/tests/emacsql-external-tests.el
@@ -12,11 +12,15 @@
 
 (defvar emacsql-tests-connection-factories
   (let ((factories ())
-        (pgdatabase (getenv "PGDATABASE")))
+        (pgdatabase (getenv "PGDATABASE"))
+        (mysql-dbname (getenv "MYSQL_DBNAME")))
     (push (cons "sqlite" (apply-partially #'emacsql-sqlite nil)) factories)
     (when pgdatabase
       (push (cons "psql" (apply-partially #'emacsql-psql pgdatabase))
             factories))
+    (when mysql-dbname
+      (push (cons "mysql" (apply-partially #'emacsql-mysql mysql-dbname))
+            factories))
     (nreverse factories))
   "List of connection factories to use in unit tests.")