mockData  = byte('[')
	)

	r := newMockReader(failAfter, mockData)
	decoder := NewDecoder(r, -1)

	for mv := range decoder.Stream() {
		t.Logf("depth=%d offset=%d len=%d (%v)", mv.Depth, mv.Offset, mv.Length, mv.Value)
	}

	err := decoder.Err()
	t.Logf("got error: %s", err)
	if err == nil {
		t.Fatalf("missing expected decoder error")
	}

	derr, ok := err.(DecoderError)
	if !ok {

		c := scanner.next()
		if scanner.readerErr != nil {
			t.Fatal(scanner.readerErr)
		}
		if c != data[i] {
			t.Fatalf("expected %s, got %s", string(data[i]), string(c))
		}
		t.Logf("pos=%d remaining=%d (%s)", i, r.Len(), string(c))
		i++
	}
}

type mockReader struct {
	pos       int
	mockData  byte
	failAfter int
}

func newMockReader(failAfter int, data byte) *mockReader {

			resultFileName:     "user-defined.conf",
			expectedOutputFile: testDataDir + "/expected/YYY-istio-cni.conf",
		},
	}
	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			t.Logf("%s: Test preconf %s, expected %s", tc.name, tc.preConfFile, tc.expectedOutputFile)
			install.RunInstallCNITest(t, tc.chainedCNIPlugin, tc.preConfFile, tc.resultFileName, tc.delayedConfFile, tc.expectedOutputFile,

				p := make([]byte, 50)
				n, err := br.Read(p)
				if err != wantErr || n != len(s) || string(p[:n]) != s {
					t.Fatalf("read(%d) = %q, %v, want %q, %v", len(p), string(p[:n]), err, s, wantErr)
				}
				t.Logf("read(%d) = %q, %v", len(p), string(p[:n]), err)
			}
			want("abc", nil)
			want("", nil)
			want("def", nil)
			want("", io.EOF)
		})
	}
}

func TestReaderReset(t *testing.T) {