Travis build will only test against one exercise that's been modified

.travis.yml

@@ -4,17 +4,23 @@ jdk:
   - oraclejdk8
 env:
   - SCRIPT=bin/unit-tests.sh
- 
-  # https://stackoverflow.com/questions/3790454/in-yaml-how-do-i-break-a-string-over-multiple-lines
+
   - SCRIPT="bin/build-jq.sh;
-      for file in \`curl -s https://api.github.com/repos/exercism/java/pulls/$TRAVIS_PULL_REQUEST/files | bin/jq -r '.[].filename'\`;
-      do if [[ \$file == exercises* ]] || [[ \$file == config.json ]];
-        then rvm install 2.2.5;
-        rvm use 2.2.5;
-        bin/journey-tests.sh;
-        break;
-      fi;
-    done"
+      modded_files=\`curl -s https://api.github.com/repos/exercism/java/pulls/${TRAVIS_PULL_REQUEST}/files | bin/jq -r '.[].filename'\`;
+      for file in \$modded_files;
+        do if [[ \$file == exercises* ]] || [[ \$file == config.json ]];
+          then rvm install 2.2.5;
+          rvm use 2.2.5;
+          for file2 in \$modded_files;
+            do if [[ \$file2 == exercises* ]];
+              then modded_exercise=\${file2#exercises/};
+              modded_exercise=\${modded_exercise%%/*};
+            fi;
+          done;
+          bin/journey-test.sh \$modded_exercise;
+          break;
+        fi;
+      done"
 
 # http://docs.travis-ci.com/user/migrating-from-legacy
 sudo: false

bin/journey-test.sh

@@ -4,6 +4,7 @@ TRACK=java
 TRACK_REPO="$TRACK"
 TRACK_SRC_EXT="java"
 CPU_CORES=`getconf NPROCESSORS_ONLN 2>/dev/null || getconf _NPROCESSORS_ONLN 2>/dev/null || echo 1`
+EXERCISE_TO_SOLVE=$1
 
 on_exit() {
   echo ">>> on_exit()"
@@ -256,6 +257,41 @@ solve_all_exercises() {
   popd
 }
 
+solve_single_exercise() {
+  local exercism_exercises_dir="$1"
+  local exercism_configfile="$2"
+  local exercise_to_solve="$3"
+  echo ">>> solve_all_exercises(exercism_exercises_dir=\"${exercism_exercises_dir}\", exercism_configfile=\"${exercism_configfile}\", exercise_to_solve=\"$exercise_to_solve\")"
+
+  local track_root=$( pwd )
+  local exercism_cli="./exercism --config ${exercism_configfile}"
+
+  pushd ${exercism_exercises_dir}
+
+  echo -e "\n\n"
+  echo "=================================================="
+  echo "Solving ${exercise_to_solve}"
+  echo "=================================================="
+
+  ${exercism_cli} fetch ${TRACK} $exercise_to_solve
+  cp -R -H ${track_root}/exercises/${exercise_to_solve}/src/example/${TRACK}/* ${exercism_exercises_dir}/${TRACK}/${exercise_to_solve}/src/main/${TRACK}/
+
+  pushd ${exercism_exercises_dir}/${TRACK}/${exercise_to_solve}
+  # Check that tests compile before we strip @Ignore annotations
+  "$EXECPATH"/gradlew compileTestJava
+  # Ensure we run all the tests (as delivered, all but the first is @Ignore'd)
+  for testfile in `find . -name "*Test.${TRACK_SRC_EXT}"`; do
+    # Strip @Ignore annotations to ensure we run the tests (as delivered, all but the first is @Ignore'd).
+    # Note that unit-test.sh also strips @Ignore annotations via the Gradle task copyTestsFilteringIgnores.
+    # The stripping implementations here and in copyTestsFilteringIgnores should be kept consistent.
+    sed 's/@Ignore\(\(.*\)\)\{0,1\}//' ${testfile} > "${tempfile}" && mv "${tempfile}" "${testfile}"
+  done
+  "$EXECPATH"/gradlew test
+  popd
+
+  popd
+}
+
 main() {
   # all functions assume current working directory is repository root.
   cd "${SCRIPTPATH}/.."
@@ -296,7 +332,11 @@ main() {
   # Create a CLI install and config just for this build; this script does not use your CLI install.
   configure_exercism_cli "${exercism_home}" "${exercism_configfile}" "${xapi_port}"
 
-  solve_all_exercises "${exercism_home}" "${exercism_configfile}"
+  if [[ ${EXERCISE_TO_SOLVE} == "" ]]; then
+    solve_all_exercises "${exercism_home}" "${exercism_configfile}"
+  else
+    solve_single_exercise "${exercism_home}" "${exercism_configfile}" "${EXERCISE_TO_SOLVE}"
+  fi
 }
 
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