Adds valueFn as a Config method (#226)

metal · Apr 14, 2017 · 91bb1f2 · 91bb1f2
1 parent 497d8cd
commit 91bb1f2
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diff --git a/packages/metal-state/src/Config.js b/packages/metal-state/src/Config.js
@@ -80,6 +80,17 @@ const Config = {
 		return mergeConfig(this, {
 			value
 		});
+	},
+
+	/**
+	 * Adds a valueFn that will return a default value for the `State` configuration.
+	 * @param {!function()} valueFn
+	 * @return {!Object} `State` configuration object.
+	 */
+	valueFn(valueFn) {
+		return mergeConfig(this, {
+			valueFn
+		});
 	}
 };
 

diff --git a/packages/metal-state/test/Config.js b/packages/metal-state/test/Config.js
@@ -51,6 +51,15 @@ describe('Config', function() {
 		}, config.config);
 	});
 
+	it('should return config with specified "valueFn"', function() {
+		var valueFn = () => {};
+		var config = Config.valueFn(valueFn);
+		assert.ok(core.isObject(config));
+		assert.deepEqual({
+			valueFn
+		}, config.config);
+	});
+
 	it('should return config with specified "setter"', function() {
 		var setter = () => {
 		};