From 09e0cc481535b99d4b39370ee3250b392bc3464c Mon Sep 17 00:00:00 2001
From: Jack Christensen <jack@jackchristensen.com>
Date: Thu, 12 Nov 2015 15:27:20 -0600
Subject: [PATCH] Skip JSON tests for old PostgreSQL servers

---
 stdlib/sql_test.go | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/stdlib/sql_test.go b/stdlib/sql_test.go
index e15c9744..83a7d949 100644
--- a/stdlib/sql_test.go
+++ b/stdlib/sql_test.go
@@ -440,6 +440,10 @@ func TestConnQueryJSONIntoByteSlice(t *testing.T) {
 	db := openDB(t)
 	defer closeDB(t, db)
 
+	if !serverHasJSON(t, db) {
+		t.Skip("Skipping due to server's lack of JSON type")
+	}
+
 	_, err := db.Exec(`
 		create temporary table docs(
 			body json not null
@@ -476,6 +480,10 @@ func TestConnExecInsertByteSliceIntoJSON(t *testing.T) {
 	db := openDB(t)
 	defer closeDB(t, db)
 
+	if !serverHasJSON(t, db) {
+		t.Skip("Skipping due to server's lack of JSON type")
+	}
+
 	_, err := db.Exec(`
 		create temporary table docs(
 			body json not null
@@ -510,6 +518,15 @@ func TestConnExecInsertByteSliceIntoJSON(t *testing.T) {
 	ensureConnValid(t, db)
 }
 
+func serverHasJSON(t *testing.T, db *sql.DB) bool {
+	var hasJSON bool
+	err := db.QueryRow(`select true from pg_type where typname='json'`).Scan(&hasJSON)
+	if err != nil {
+		t.Fatalf("db.QueryRow unexpectedly failed: %v", err)
+	}
+	return hasJSON
+}
+
 func TestTransactionLifeCycle(t *testing.T) {
 	db := openDB(t)
 	defer closeDB(t, db)