Don't log warnings in test

grafast/grafast/src/dev.ts

@@ -5,13 +5,12 @@ const graphileEnv =
   typeof process !== "undefined" ? process.env.GRAPHILE_ENV : undefined;
 const nodeEnv =
   typeof process !== "undefined" ? process.env.NODE_ENV : undefined;
+const mode = graphileEnv !== undefined ? graphileEnv : nodeEnv;
 /**
  * @internal
  */
-export const isDev =
-  graphileEnv !== undefined
-    ? graphileEnv === "development" || graphileEnv === "test"
-    : nodeEnv === "development" || nodeEnv === "test";
+export const isDev = mode === "development" || mode === "test";
+export const isTest = mode === "test";
 export function noop(): void {}
 
 if (
@@ -22,7 +21,7 @@ if (
   console.warn(
     `The GRAPHILE_ENV environmental variable is not set; Grafast will run in production mode. In your development environments, it's recommended that you set \`GRAPHILE_ENV=development\` to opt in to additional checks that will provide guidance and help you to catch issues in your code earlier, and other changes such as formatting to improve your development experience.`,
   );
-} else if (isDev) {
+} else if (isDev && !isTest) {
   console.warn(
     `Grafast is running in development mode due to \`${
       graphileEnv !== undefined