Add code check for framework.ExpectEqual()

This adds code check for using framework.ExpectEqual(foo, bar) in
e2e tests for keeping the test code simple.

hack/verify-test-code.sh

@@ -42,6 +42,15 @@ do
     fi
 done
 
+errors_expect_equal=()
+for file in "${all_e2e_files[@]}"
+do
+    if grep -E "Expect\(.*\)\.To\((gomega\.Equal|Equal)" "${file}" > /dev/null
+    then
+        errors_expect_equal+=( "${file}" )
+    fi
+done
+
 if [ ${#errors_expect_no_error[@]} -ne 0 ]; then
   {
     echo "Errors:"
@@ -70,4 +79,18 @@ if [ ${#errors_expect_error[@]} -ne 0 ]; then
   exit 1
 fi
 
+if [ ${#errors_expect_equal[@]} -ne 0 ]; then
+  {
+    echo "Errors:"
+    for err in "${errors_expect_equal[@]}"; do
+      echo "$err"
+    done
+    echo
+    echo 'The above files need to use framework.ExpectEqual(foo, bar) instead of '
+    echo 'Expect(foo).To(Equal(bar)) or gomega.Expect(foo).To(gomega.Equal(bar))'
+    echo
+  } >&2
+  exit 1
+fi
+
 echo 'Congratulations!  All e2e test source files are valid.'