Retrieve Alias Path

.gitignore

@@ -1 +1,2 @@
 node_modules
+.idea/*

index.js

@@ -204,9 +204,23 @@ function init (options) {
   }
 }
 
+// Retrieve a path by specifying a registered alias
+function getAliasPath(alias) {
+    if (typeof alias !== 'string') {
+        throw new Error('"' + alias + '": is not of type string');
+    }
+
+    if (!moduleAliases[alias]) {
+        throw new Error('"' + alias + '": alias does not exist');
+    }
+
+    return moduleAliases[alias];
+}
+
 module.exports = init
 module.exports.addPath = addPath
 module.exports.addAlias = addAlias
 module.exports.addAliases = addAliases
 module.exports.isPathMatchesAlias = isPathMatchesAlias
 module.exports.reset = reset
+module.exports.getAliasPath = getAliasPath

test/specs.js

@@ -241,4 +241,26 @@ describe('Custom handler function', function () {
     })
       .to.throw('[module-alias] Expecting custom handler function to return path.')
   })
+
+  it('should return a path matching the alias', function () {
+      var expected = path.join(__dirname, 'src/bar/baz');
+      moduleAlias.addAlias('@root', expected);
+
+      var rootPath = moduleAlias.getAliasPath('@root');
+      expect(rootPath).to.equal(expected);
+  })
+
+  it('should throw when alias does not exist', function () {
+      var expected = '[@randomPath]: alias does not exist';
+      expect(function () {
+          moduleAlias.getAliasPath('@randomPath');
+      }).to.throw(expected);
+  })
+
+  it('should throw when alias is not a string', function () {
+      var expected = '"123": is not of type string';
+      expect(function () {
+          moduleAlias.getAliasPath(123);
+      }).to.throw(expected);
+  })
 })