skip JSON tests only when `--sqlite=/usr` (or similar) is tested

scripts/build_against_node.sh

@@ -20,6 +20,7 @@ npm test
 publish
 
 # now test building against shared sqlite
+export NODE_SQLITE3_JSON1=no
 if [[ $(uname -s) == 'Darwin' ]]; then
     brew install sqlite
     npm install --build-from-source --sqlite=$(brew --prefix) --clang=1
@@ -27,6 +28,7 @@ else
     npm install --build-from-source --sqlite=/usr --clang=1
 fi
 npm test
+export NODE_SQLITE3_JSON1=yes
 
 platform=$(uname -s | sed "y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/")
 
@@ -61,6 +63,7 @@ if [[ $(uname -s) == 'Linux' ]]; then
     # broken for some unknown reason against io.js
     if [[ ${NODE_VERSION:0:4} != 'iojs' ]]; then
         # test source compile in 32 bit mode against external libsqlite3
+        export NODE_SQLITE3_JSON1=no
         CC=gcc-4.6 CXX=g++-4.6 npm install --build-from-source --sqlite=/usr  --clang=1
         npm test
     fi

test/json.test.js

 var sqlite3 = require('..');
 
-describe.skip('json', function() {
-    var db;
-
-    before(function(done) {
-        db = new sqlite3.Database(':memory:', done);
+if( process.env.NODE_SQLITE3_JSON1 === 'no' ){
+    describe('json', function() {
+        it(
+            'skips JSON tests when --sqlite=/usr (or similar) is tested',
+            function(){}
+        );
     });
+} else {
+    describe('json', function() {
+        var db;
+
+        before(function(done) {
+            db = new sqlite3.Database(':memory:', done);
+        });
 
-    it('should select JSON', function(done) {
-        db.run('SELECT json(?)', JSON.stringify({ok:true}), done);
+        it('should select JSON', function(done) {
+            db.run('SELECT json(?)', JSON.stringify({ok:true}), done);
+        });
     });
-});
+}