systemHelper.addDesignJspFileName("xxx", "yyy");
        assertEquals("yyy", systemHelper.getDesignJspFileName("xxx"));
        final Pair<String, String>[] designJspFileNames = systemHelper.getDesignJspFileNames();
        assertEquals(1, designJspFileNames.length);
        assertEquals("xxx", designJspFileNames[0].getFirst());
        assertEquals("yyy", designJspFileNames[0].getSecond());
    }

    suite.addTest(testsForTransform());
    suite.addTestSuite(Collections2Test.class);
    return suite;
  }

  static final Predicate<@Nullable String> NOT_YYY_ZZZ =
      input -> !"yyy".equals(input) && !"zzz".equals(input);

  static final Predicate<String> LENGTH_1 = input -> input.length() == 1;

  @J2ktIncompatible
  @GwtIncompatible // suite
  private static Test testsForFilter() {

			specifiedConfName: "never-created.conf",
			existingConfFiles: []string{"bridge.conf", "list.conflist"},
		},
		{
			name:             "standalone CNI plugin unspecified CNI config file",
			expectedConfName: "YYY-istio-cni.conf",
		},
		{
			name:              "standalone CNI plugin specified CNI config file",
			specifiedConfName: "specific-name.conf",
			expectedConfName:  "specific-name.conf",
		},
	}

            new TestStringSetGenerator() {
              @Override
              public Set<String> create(String[] elements) {
                Set<String> unfiltered = Sets.newLinkedHashSet();
                unfiltered.add("yyy");
                Collections.addAll(unfiltered, elements);
                unfiltered.add("zzz");
                return Sets.filter(unfiltered, Collections2Test.NOT_YYY_ZZZ);
              }
            })

// Test that panic message is not clobbered.
// See issue 30150.
func TestDoublePanic(t *testing.T) {
	output := runTestProg(t, "testprog", "DoublePanic", "GODEBUG=clobberfree=1")
	wants := []string{"panic: XXX", "panic: YYY"}
	for _, want := range wants {
		if !strings.Contains(output, want) {
			t.Errorf("output:\n%s\n\nwant output containing: %s", output, want)
		}
	}
}

You can have attributes on both the requested dependency _or_ the substitute and the substitution is not limited to `platform`: you can actually specify the whole set of dependency attributes using the `variant` notation.