From 68f782cee439ced586432893025bcccde65cd32a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jos=C3=A9=20F=2E=20Romaniello?= <jfromaniello@gmail.com>
Date: Fri, 5 Jul 2019 11:38:28 -0300
Subject: [PATCH] fix issue when parameters are empty or the first arg is not
 an string, closes #49

---
 lib/url-join.js   |    5 +
 package-lock.json | 1444 +++++++++++++++++++++++++++++++++++++++++++++
 test/tests.js     |    6 +
 3 files changed, 1455 insertions(+)
 create mode 100644 package-lock.json

diff --git a/lib/url-join.js b/lib/url-join.js
index bfadd54..e23bb16 100644
--- a/lib/url-join.js
+++ b/lib/url-join.js
@@ -6,6 +6,11 @@
 
   function normalize (strArray) {
     var resultArray = [];
+    if (strArray.length === 0) { return ''; }
+
+    if (typeof strArray[0] !== 'string') {
+      throw new TypeError('Url must be a string. Received ' + strArray[0]);
+    }
 
     // If the first part is a plain protocol, we combine it with the next part.
     if (strArray[0].match(/^[^/:]+:\/*$/) && strArray.length > 1) {
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..626a436
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,1444 @@
+{
+  "name": "url-join",
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+      "dev": true,
+      "requires": {
+        "jsonparse": "^1.2.0",
+        "through": ">=2.2.7 <3"
+      }
+    },
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+      "dev": true
+    },
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+      "resolved": "https://registry.npmjs.org/array-ify/-/array-ify-1.0.0.tgz",
+      "integrity": "sha1-nlKHYrSpBmrRY6aWKjZEGOlibs4=",
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+    "arrify": {
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+      "integrity": "sha1-iYUI2iIm84DfkEcoRWhJwVAaSw0=",
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+}
diff --git a/test/tests.js b/test/tests.js
index f2dde0f..6876276 100644
--- a/test/tests.js
+++ b/test/tests.js
@@ -100,6 +100,8 @@ describe('url join', function () {
   });
 
   it('should fail with segments that are not string', function() {
+    assert.throws(() => urljoin(true),
+                  /Url must be a string. Received true/);
     assert.throws(() => urljoin('http://blabla.com/', 1),
                   /Url must be a string. Received 1/);
     assert.throws(() => urljoin('http://blabla.com/', undefined, 'test'),
@@ -142,4 +144,8 @@ describe('url join', function () {
     urljoin('', 'http://foobar.com', '', 'test')
       .should.eql('http://foobar.com/test');
   });
+
+  it('should return an empty string if no arguments are supplied', function() {
+    urljoin().should.eql('');
+  });
 });