@Test public void whenMergingJoiners_thenReturnMerged() { StringJoiner rgbJoiner = new StringJoiner( ",", PREFIX, SUFFIX); StringJoiner cmybJoiner = new StringJoiner( "-", PREFIX, SUFFIX); rgbJoiner.add("Red") .add("Green") .add("Blue"); cmybJoiner.add("Cyan") .add("Magenta") .add("Yellow") .add("Black"); rgbJoiner.merge(cmybJoiner); assertEquals( rgbJoiner.toString(), "[Red,Green,Blue,Cyan-Magenta-Yellow-Black]"); }
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