Fix update command without whitelisted packages

poetry/installation/installer.py

@@ -125,7 +125,14 @@ class Installer:
     def _do_install(self, local_repo):
         locked_repository = Repository()
         if self._update:
-            if self._locker.is_locked():
+            if self._locker.is_locked() and self._whitelist:
+                # If we update with a lock file present and
+                # we have whitelisted packages (the ones we want to update)
+                # we get the lock file packages to only update
+                # what is strictly needed.
+                #
+                # Otherwise, the lock file information is irrelevant
+                # since we want to update everything.
                 locked_repository = self._locker.locked_repository(True)
 
             # Checking extras

tests/installation/fixtures/update-with-lock.test

+[[package]]
+name = "A"
+version = "1.1"
+description = ""
+category = "main"
+optional = false
+python-versions = "*"
+platform = "*"
+
+[metadata]
+python-versions = "*"
+platform = "*"
+content-hash = "123456789"
+
+[metadata.hashes]
+"A" = []

tests/installation/test_installer.py

@@ -650,3 +650,38 @@ def test_run_changes_category_if_needed(installer, locker, repo, package):
     expected = fixture('with-category-change')
 
     assert locker.written_data == expected
+
+
+def test_run_update_all_with_lock(installer, locker, repo, package):
+    locker.locked(True)
+    locker.mock_lock_data({
+        'package': [{
+            'name': 'A',
+            'version': '1.0',
+            'category': 'dev',
+            'optional': True,
+            'platform': '*',
+            'python-versions': '*',
+            'checksum': []
+        }],
+        'metadata': {
+            'python-versions': '*',
+            'platform': '*',
+            'content-hash': '123456789',
+            'hashes': {
+                'A': [],
+            }
+        }
+    })
+    package_a = get_package('A', '1.1')
+    repo.add_package(get_package('A', '1.0'))
+    repo.add_package(package_a)
+
+    package.add_dependency('A')
+
+    installer.update(True)
+
+    installer.run()
+    expected = fixture('update-with-lock')
+
+    assert locker.written_data == expected