Build and test Rocket integration on nightly compiler on Travis

.travis.yml

@@ -21,9 +21,30 @@ env:
     - secure: "SsepHEYRmW9ee3RhxPpqGuPigZINFfA/yOwUJFseQt4t+Zs90r1xdl3Q8eDfPlnvBsL7Rd0QQrFDO7JUaimVLlgQkUnrl62o0CYzkodp+qtocyAHS00W6WTqi8Y6E6KBxPshCl03dRLaySUfx5TqTLTIHkJ0G6vDW35k7hRrA3221lRphs5rrpvAZ21pqsDsNLH3HVo792L6A0kOtBa3ocw1pgHLxnBbArIViu2htUuFvY/TgsmVbAdlow0efw/xkcJ/p0/r5q7igLek6Iqk8udfRc7CktvoiFQ2vUnhtNtQu/zYll3Q7OUx5d+w5lhbzz2QINmsezBEisH9k1haL7dMviLPp0pn4WZed60KovO0Iqfgjy1utTaKvJVfNWYsgkfU8c9a/z2rcZOKwXNKQW2ptBrtVjaB9dk7eMoyuFCDZwNtKqvG+ZKmvMpun+R8mmx+buOmN8Vlf5ygIoGxz3nbEtlLYGVTXHfdXXqRkFIwtiYVJEO7SLRKT9pbx1E++ARsi2+y8bXJT4e4z0osYMq9EsiFUpw3J2gcshrgseqkB7UgCZ3SXuitJnJNfDAU3a3nwwS/JiAunZMNnC4rKUBbl7WbTB4Cpw7EgVOlCqcyyzlkNl3xabLzTFzLOfSHLTVX5FmGNsD21vBoS5/8ejftx9wuV3rGHxuO3i3+A3k="
 
 script:
+  # Build library standalone, with Iron, and with Rocket integrations enabled, respectively
   - cargo build --verbose
   - cargo build --verbose --features iron-handlers
-  - cargo test --verbose --features "iron-handlers expose-test-schema"
+  - |
+    if [ "$TRAVIS_RUST_VERSION" = "nightly" ]; then
+      cargo build --verbose --features rocket-handlers
+    fi
+
+  # Build example binaries; first Iron, then Rocket examples
+  - cargo build --verbose --example server --features "iron-handlers expose-test-schema"
+  - |
+    if [ "TRAVIS_RUST_VERSION" = "nightly" ]; then
+      cargo build --verbose --example rocket-server --features "rocket-handlers expose-test-schema"
+    fi
+
+  # Run all tests for the base library and available integrations
+  - export TEST_FEATURES="iron-handlers expose-test-schema"
+  - |
+    if [ "$TRAVIS_RUST_VERSION" = "nightly" ]; then
+      export TEST_FEATURES="$TEST_FEATURES rocket-handlers"
+    fi
+
+  - cargo test --verbose --features "$TEST_FEATURES"
+
 
 before_deploy:
   - rm -rf target/package/