gitlab-ci: Run tests on merge requests and tags

I can't see what other things `check` is running besides tests.

.gitlab-ci.yml

@@ -0,0 +1,24 @@
+image: openjdk:8-alpine
+
+stages:
+    - test
+
+cache:
+    key: ${CI_COMMIT_REF_SLUG}
+    paths:
+        - $HOME/.gradle/caches/
+        - $HOME/.gradle/wrapper/
+        - .gradle
+
+test:
+    stage: test
+    coverage: '/Total.*?([0-9]{1,3})%/'
+    before_script:
+        - apk add --no-cache grep
+    script:
+        - ./gradlew codeCoverageReport
+        # The actual output that will be parsed by the code coverage
+        - grep -oP "Total.*?%" build/reports/jacoco/html/index.html
+    only:
+        - merge_requests
+        - tags

apps/ministreaming/java/test/junit/net/i2p/client/streaming/I2PSocketExceptionTest.java

@@ -60,6 +60,6 @@ public class I2PSocketExceptionTest {
     public void testUnknownStatus() {
         I2PSocketException e = new I2PSocketException(255);
         assertThat(e.getStatus(), is(255));
-        assertThat(e.getMessage(), is("Failure code: 255"));
+        assertThat(e.getMessage(), endsWith(": 255"));
     }
 }