Add a test checking for used deps

Author: guw

.github/workflows/main.yml

@@ -87,6 +87,13 @@ jobs:
         bazelisk build --config=${{ matrix.compiler }} --java_runtime_version=${{ matrix.java_versions.runtime }}  --java_language_version=${{ matrix.java_versions.language }} //...
         bazelisk test --config=${{ matrix.compiler }} --config=debug --java_runtime_version=${{ matrix.java_versions.runtime }}  --java_language_version=${{ matrix.java_versions.language }} //...
       
+    - name: Test -Xecj_collect_used_deps
+      if: ${{ matrix.compiler == 'ecj' }}
+      run: |
+        cd examples/
+        bazelisk build --config=${{ matrix.compiler }} --java_runtime_version=${{ matrix.java_versions.runtime }}  --java_language_version=${{ matrix.java_versions.language }} //...
+        java/example/test/used_deps_test.sh
+
     - name: Test Compile with source 11 target 17
       if: ${{ (matrix.java_versions.language == '11' && matrix.java_versions.runtime == 'remotejdk_17') || (matrix.java_versions.language == '17' && matrix.java_versions.runtime == 'remotejdk_21') }}
       run: |

examples/java/BUILD

@@ -41,4 +41,3 @@ java_junit5_test(
         artifact("org.junit.platform:junit-platform-reporting"),
     ],
 )
-

examples/java/example/test/used_deps_test.sh

@@ -0,0 +1,12 @@
+#!/bin/sh
+
+set -e
+SCRIPT_DIR="$(dirname "$0")"
+jdeps_file="$(realpath $SCRIPT_DIR/../../../bazel-bin/java/ExampleTest.jdeps)"
+
+if ! grep -q "junit-jupiter-api" $jdeps_file; then
+  echo "bazel-bin/java/ExampleTest.jdeps) does not contain 'junit-jupiter-api'."
+  exit 1
+fi
+
+echo "expected dependency found"