Improve SourceMapTestCase to report errors found during the compilation.

PiperOrigin-RevId: 698864161

Author: 12wrigja

test/com/google/debugging/sourcemap/SourceMapTestCase.java

@@ -26,12 +26,16 @@
 import com.google.common.reflect.TypeToken;
 import com.google.debugging.sourcemap.proto.Mapping.OriginalMapping;
 import com.google.gson.Gson;
+import com.google.javascript.jscomp.CheckLevel;
 import com.google.javascript.jscomp.Compiler;
 import com.google.javascript.jscomp.CompilerOptions;
+import com.google.javascript.jscomp.DiagnosticGroups;
+import com.google.javascript.jscomp.JSError;
 import com.google.javascript.jscomp.Result;
 import com.google.javascript.jscomp.SourceFile;
 import com.google.javascript.jscomp.SourceMap;
 import com.google.javascript.jscomp.SourceMap.DetailLevel;
+import com.google.javascript.jscomp.WarningsGuard;
 import java.io.IOException;
 import java.lang.reflect.Type;
 import java.util.LinkedHashMap;
@@ -299,7 +303,14 @@ protected RunResult compile(String js1, String fileName1, String js2, String fil
 
     Result result = compiler.compile(EXTERNS, inputs, options);
 
-    assertWithMessage("compilation failed").that(result.success).isTrue();
+    assertWithMessage("compilation failed with errors")
+        .that(result.errors)
+        .isEqualTo(ImmutableList.of());
+    assertWithMessage("compilation failed with warnings")
+        .that(result.warnings)
+        .isEqualTo(ImmutableList.of());
+
+    assertWithMessage("compilation failed (other reason)").that(result.success).isTrue();
     String source = compiler.toSource();
 
     StringBuilder sb = new StringBuilder();
@@ -323,6 +334,17 @@ protected CompilerOptions getCompilerOptions() {
     options.setSourceMapFormat(getSourceMapFormat());
     options.setSourceMapDetailLevel(detailLevel);
     options.setSourceMapIncludeSourcesContent(sourceMapIncludeSourcesContent);
+    options.addWarningsGuard(
+        new WarningsGuard() {
+
+          @Override
+          public CheckLevel level(JSError error) {
+            if (DiagnosticGroups.CHECK_USELESS_CODE.matches(error)) {
+              return CheckLevel.OFF;
+            }
+            return null;
+          }
+        });
     return options;
   }
 }

test/com/google/javascript/jscomp/testdata/SourceMapJsLangTest/closureunawarecode.jsdata

@@ -1,7 +1,10 @@
-/** @closureUnaware */
+/**
+ * @fileoverview
+ * @closureUnaware
+ */
 goog.module('a.b.c');
 
-(function() {
+(/** @closureUnaware */ function() {
    class ClazzWithStatic {
      constructor() {}