Add an update whitelist test for a dependency specified in composer.json

tests/Composer/Test/Fixtures/installer/update-whitelist-locked-require.test

@@ -0,0 +1,36 @@
+--TEST--
+Update with a package whitelist only updates those packages and their dependencies if they are not present in composer.json
+--COMPOSER--
+{
+    "repositories": [
+        {
+            "type": "package",
+            "package": [
+                { "name": "whitelisted", "version": "1.1.0", "require": { "dependency": "1.1.0", "fixed-dependency": "1.*" } },
+                { "name": "whitelisted", "version": "1.0.0", "require": { "dependency": "1.0.0", "fixed-dependency": "1.*" } },
+                { "name": "dependency", "version": "1.1.0" },
+                { "name": "dependency", "version": "1.0.0" },
+                { "name": "fixed-dependency", "version": "1.1.0", "require": { "fixed-sub-dependency": "1.*" } },
+                { "name": "fixed-dependency", "version": "1.0.0", "require": { "fixed-sub-dependency": "1.*" } },
+                { "name": "fixed-sub-dependency", "version": "1.1.0" },
+                { "name": "fixed-sub-dependency", "version": "1.0.0" }
+            ]
+        }
+    ],
+    "require": {
+        "whitelisted": "1.*",
+        "fixed-dependency": "1.*"
+    }
+}
+--INSTALLED--
+[
+    { "name": "whitelisted", "version": "1.0.0", "require": { "dependency": "1.0.0", "fixed-dependency": "1.0.0" } },
+    { "name": "dependency", "version": "1.0.0" },
+    { "name": "fixed-dependency", "version": "1.0.0", "require": { "fixed-sub-dependency": "1.*" } },
+    { "name": "fixed-sub-dependency", "version": "1.0.0" }
+]
+--RUN--
+update whitelisted
+--EXPECT--
+Updating dependency (1.0.0) to dependency (1.1.0)
+Updating whitelisted (1.0.0) to whitelisted (1.1.0)

tests/Composer/Test/Fixtures/installer/update-whitelist.test

@@ -1,5 +1,5 @@
 --TEST--
-Update with a package whitelist only updates those packages and their dependencies if they are not present in composer.json
+Update with a package whitelist only updates those packages and their dependencies listed as command arguments
 --COMPOSER--
 {
     "repositories": [