### Question:
JsFunctionDeclarerBuilder { public JsFunctionBodyBuilder startBody() { return new JsFunctionBodyBuilder(this); } JsFunctionDeclarerBuilder(String functionName, JsCollector jsCollector); JsFunctionDeclarerBuilder withParameters(String... parameters); JsFunctionBodyBuilder startBody(); JsCollector write(String body);  }### Answer:
@Test public void canCreateNotNullBodyBuilder() { JsCollector jsCollector = mock(JsCollector.class); String functionName = "something"; JsFunctionDeclarerBuilder jsFunctionDeclarerBuilder = new JsFunctionDeclarerBuilder(functionName, jsCollector); assertNotNull(jsFunctionDeclarerBuilder.startBody()); }