[Tests] run prepublish tests as allowed failures

Author: ljharb

.travis.yml

@@ -5,20 +5,28 @@ node_js:
   - "6"
   - "5"
   - "4"
-env:
-  - 'TEST_DIR=packages/eslint-config-airbnb'
-  - 'TEST_DIR=packages/eslint-config-airbnb-base'
 before_install:
-  - 'cd $TEST_DIR'
   - 'if [ "${TRAVIS_NODE_VERSION}" = "0.6" ]; then npm install -g npm@1.3 ; elif [ "${TRAVIS_NODE_VERSION}" != "0.9" ]; then case "$(npm --version)" in 1.*) npm install -g npm@1.4.28 ;; 2.*) npm install -g npm@2 ;; esac ; fi'
   - 'if [ "${TRAVIS_NODE_VERSION%${TRAVIS_NODE_VERSION#[0-9]}}" = "0" ] || [ "${TRAVIS_NODE_VERSION:0:4}" = "iojs" ]; then npm install -g npm@4.5 ; elif [ "${TRAVIS_NODE_VERSION}" != "0.6" ] && [ "${TRAVIS_NODE_VERSION}" != "0.9" ]; then npm install -g npm; fi'
 install:
+  - 'cd "packages/${PACKAGE}"'
   - 'if [ "${TRAVIS_NODE_VERSION}" = "0.6" ]; then nvm install 0.8 && npm install -g npm@1.3 && npm install -g npm@1.4.28 && npm install -g npm@2 && npm install && nvm use "${TRAVIS_NODE_VERSION}"; else npm install; fi;'
 script:
-  - 'npm run travis'
+  - 'if [ -n "${PREPUBLISH-}" ]; then npm run prepublish; else npm run travis; fi'
 sudo: false
+env:
+  matrix:
+    - 'TEST=true PACKAGE=eslint-config-airbnb'
+    - 'TEST=true PACKAGE=eslint-config-airbnb-base'
 matrix:
   fast_finish: true
+  include:
+    - node_js: "node"
+      env: PREPUBLISH=true PACKAGE=eslint-config-airbnb
+    - node_js: "node"
+      env: PREPUBLISH=true PACKAGE=eslint-config-airbnb-base
   allow_failures:
     - node_js: "7"
     - node_js: "5"
+    - env: PREPUBLISH=true PACKAGE=eslint-config-airbnb
+    - env: PREPUBLISH=true PACKAGE=eslint-config-airbnb-base