fix plus sign bug (#54)

Author: satanshiro

.github/workflows/ci.yaml

@@ -0,0 +1,13 @@
+name: Run Unit Tests
+on:   
+  pull_request:
+    branches:
+      - '**'
+jobs:
+  unit_test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - run: |
+              npm ci
+              npm run test

src/package-url.js

@@ -104,7 +104,7 @@ class PackageURL {
 
     if (this.version) {
       purl.push('@');
-      purl.push(encodeURIComponent(this.version).replace(/%3A/g, ':'));
+      purl.push(encodeURIComponent(this.version).replace(/%3A/g, ':').replace(/%2B/g,'+'));
     }
 
     if (this.qualifiers) {
@@ -188,7 +188,7 @@ class PackageURL {
       // Convert percent-encoded colons (:) back, to stay in line with the `toString`
       // implementation of this library.
       // https://github.com/package-url/packageurl-js/blob/58026c86978c6e356e5e07f29ecfdccbf8829918/src/package-url.js#L98C10-L98C10
-      let versionEncoded = encodeURIComponent(version).replace(/%3A/g, ':');
+      let versionEncoded = encodeURIComponent(version).replace(/%3A/g, ':').replace(/%2B/g,'+');
 
       if (rawVersion !== versionEncoded) {
         throw new Error('Invalid purl: version must be percent-encoded');

test/data/test-suite-data.json

@@ -107,6 +107,18 @@
     "subpath": null,
     "is_invalid": false
   },
+  {
+    "description": "debian can have debian versions as part of version with plus sign",
+    "purl": "pkg:deb/debian/libssl1.1@1.1.1n-0+deb10u3?arch=amd64&distro=debian-10",
+    "canonical_purl": "pkg:deb/debian/libssl1.1@1.1.1n-0+deb10u3?arch=amd64&distro=debian-10",
+    "type": "deb",
+    "namespace": "debian",
+    "name": "libssl1.1",
+    "version": "1.1.1n-0+deb10u3",
+    "qualifiers": {"arch": "amd64", "distro": "debian-10"},
+    "subpath": null,
+    "is_invalid": false
+  },
   {
     "description": "docker uses qualifiers and hash image id as versions",
     "purl": "pkg:docker/customer/dockerimage@sha256:244fd47e07d1004f0aed9c?repository_url=gcr.io",