added test for yarnpkg#2744

__tests__/commands/install/integration.js

@@ -912,3 +912,9 @@ test.concurrent('should skip integrity check and do install when --skip-integrit
 
     });
   });
+
+test.concurrent(
+  "should install if symlink source does not exist",
+  async (): Promise<void> => {
+    await runInstall({}, 'relative-symlinks-work', () => {});
+  });

__tests__/fixtures/install/relative-symlinks-work/package.json

@@ -0,0 +1,5 @@
+{
+  "dependencies": {
+    "ref": "https://github.com/icenium/ref/tarball/v1.3.2.3"
+  }
+}

__tests__/fixtures/install/relative-symlinks-work/yarn.lock

@@ -0,0 +1,34 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+bindings@1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/bindings/-/bindings-1.2.1.tgz#14ad6113812d2d37d72e67b4cacb4bb726505f11"
+
+debug@2:
+  version "2.6.1"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.1.tgz#79855090ba2c4e3115cc7d8769491d58f0491351"
+  dependencies:
+    ms "0.7.2"
+
+ms@0.7.2:
+  version "0.7.2"
+  resolved "https://registry.yarnpkg.com/ms/-/ms-0.7.2.tgz#ae25cf2512b3885a1d95d7f037868d8431124765"
+
+nan@2:
+  version "2.5.1"
+  resolved "https://registry.yarnpkg.com/nan/-/nan-2.5.1.tgz#d5b01691253326a97a2bbee9e61c55d8d60351e2"
+
+"prebuilt@https://github.com/tailsu/node-prebuilt/tarball/master":
+  version "0.1.0"
+  resolved "https://github.com/tailsu/node-prebuilt/tarball/master#be63229eaccee9c55bb67bc87eac527bdd640aa7"
+
+"ref@https://github.com/icenium/ref/tarball/v1.3.2.3":
+  version "1.3.2"
+  resolved "https://github.com/icenium/ref/tarball/v1.3.2.3#a38db0780c37c66453f3f096dc3ade802cc8ce77"
+  dependencies:
+    bindings "1"
+    debug "2"
+    nan "2"
+    prebuilt "https://github.com/tailsu/node-prebuilt/tarball/master"