Test presence of database instead of results of analysis

This is for PR #607, 'source-root' input test case.

.github/workflows/pr-checks.yml

@@ -905,21 +905,11 @@ jobs:
       with:
         languages: javascript
         source-root: tests/multi-language-repo
-    - uses: ./analyze
-      with:
-        output: "${{ runner.temp }}/results"
-      env:
-        TEST_MODE: true
-    - name: Assert Results
+    - name: Assert database exists
       run: |
-        cd "$RUNNER_TEMP/results"
-        # We should have 3 hits from these rules
-        EXPECTED_RULES="javascript/example/empty-or-one-block javascript/example/empty-or-one-block javascript/example/two-block"
-
-        # use tr to replace newlines with spaces and xargs to trim leading and trailing whitespace
-        RULES="$(cat javascript.sarif | jq -r '.runs[0].results[].ruleId' | sort | tr "\n" " " | xargs)"
-        echo "Found matching rules '$RULES'"
-        if [ "$RULES" != "$EXPECTED_RULES" ]; then
-          echo "Did not match expected rules '$EXPECTED_RULES'."
+        cd "$RUNNER_TEMP/codeql_databases"
+        if [[ ! -d javascript ]]; then
+          echo "Did not find a JavaScript database"
           exit 1
         fi
+