Tests, 90% coverage

sharedPlugins/inventoryImports/isJson.js

@@ -1,9 +1,11 @@
 module.exports = function(x){
+	if(x === false || x === true || x === null) return true; // === false is valid JSON, so is true and null
 	var isNotJson = false
 	try{
 		z = JSON.parse(x);
 	} catch (e) {
 		isNotJson = true;
 	}
+	
 	return !isNotJson;
 }

sharedPlugins/inventoryImports/isJson.spec.js

@@ -0,0 +1,20 @@
+const isJson = require("./isJson");
+const assert = require("assert");
+
+describe("isJson.js()", function(){
+	it("checks if a thing is valid JSON", function(){
+		assert(isJson("string") === false);
+		assert(isJson("{js_object_notation='very false'}") === false);
+		assert(isJson('{ "name":"John", "age":31, "city":"New York" }') === true);
+	});
+	it("recognizes that true and false are both valid JSON", function(){
+		assert(isJson(true) === true);
+		assert(isJson(false) === true);
+	});
+	it("Handles null as valid JSON (after spec)", function(){
+		assert(isJson(null) === true);
+	});
+	it("Recognizes that JSON doesn't allow trailing commas (,)", function(){
+		assert(isJson('["a", "b", ]') === false);
+	});
+});