Fix tests skipped because of missing suffixes

.travis.yml

@@ -1,8 +1,8 @@
 language: node_js
 dist: bionic
 
-before_script:
-  - node packages/pg/script/create-test-tables.js pg://[email protected]:5432/postgres
+before_script: |
+  node packages/pg/script/create-test-tables.js postgresql:///
 
 env:
   - CC=clang CXX=clang++ npm_config_clang=1 PGUSER=postgres PGDATABASE=postgres
@@ -17,6 +17,18 @@ addons:
 
 matrix:
   include:
+    # Run tests/paths that require password authentication
+    - node_js: lts/erbium
+      env:
+        - CC=clang CXX=clang++ npm_config_clang=1 PGUSER=postgres PGDATABASE=postgres PGPASSWORD=test-password
+      before_script: |
+        sudo -u postgres sed -i \
+          -e '/^local/ s/trust$/peer/' \
+          -e '/^host/ s/trust$/md5/' \
+          /etc/postgresql/10/main/pg_hba.conf
+        sudo -u postgres psql -c "ALTER ROLE postgres PASSWORD 'test-password'; SELECT pg_reload_conf()"
+        node packages/pg/script/create-test-tables.js postgresql:///
+
     - node_js: lts/carbon
       addons:
         postgresql: "9.5"

packages/pg/test/integration/connection/dynamic-password.js → packages/pg/test/integration/connection/dynamic-password-tests.js

@@ -8,6 +8,11 @@ const Client = pg.Client;
 const password = process.env.PGPASSWORD || null
 const sleep = millis => new Promise(resolve => setTimeout(resolve, millis))
 
+if (!password) {
+    // skip these tests; no password will be requested
+    return
+}
+
 suite.testAsync('Get password from a sync function', () => {
     let wasCalled = false
     function getPassword() {