Can com.google.api.client.json.jackson2.JacksonFactory have methods to configure the parser?

Is your feature request related to a problem? Please describe.

I'm always frustrated when I write escaped double quotes in Java String literal, especially when writing test cases for JSON.

 "{\"cumulative\":true, \"integer\":{\"highBits\":0, \"lowBits\":0}, " + "\"nameAndKind\":{\"kind\":\"SUM\", " + "\"name\":\"transformedValue-ElementCount\"}}" 

Concrete example: suztomo/beam@74e9335#diff-d2f80ee068a253407b9347a92b0f49a5L119

As com.google.api.client.json.jackson2.JacksonFactory does not provide API to configure the parser, I had to implement my own JacksonFactory and JacksonParser for my POC above (NonstrictJacksonFactory and MyJacksonParser).

Describe the solution you'd like

In my test cases, I want to write JSON key without double-quotes and strings in JSON with single quotes. I wish JacksonFactory allows me to set the following options:

 this.factory.configure(ALLOW_UNQUOTED_FIELD_NAMES, true); this.factory.configure(ALLOW_SINGLE_QUOTES, true); 

With these configuration, the example JSON text above can be written as:

 "{cumulative:true, integer:{highBits:0, lowBits:0}, " + "nameAndKind:{kind:'SUM', " + "name:'transformedValue-ElementCount'}}" 

This is much easier to read compared to previous example of many escape characters.

Describe alternatives you've considered
Write test case with double-quotes escaped:

 "{\"cumulative\":true, \"integer\":{\"highBits\":0, \"lowBits\":0}, " + "\"nameAndKind\":{\"kind\":\"SUM\", " + "\"name\":\"transformedValue-ElementCount\"}}" 

Write test case with ImmutableMap.of:

 ImmutableMap<String, Object> expected = ImmutableMap.of("cumulative", true, "integer", ImmutableMap.of("highBits", 0, "lowBits", 0L), "nameAndKind", ImmutableMap.of("kind", "SUM", "name", "transformedValue-ElementCount")); assertEquals(expected, result); 

(Thanks @BenWhitehead !)

Additional context

I was trying to enhance Apache Beam's test cases that relies on toString() of objects.
suztomo/beam@314b74b . I came up with my assertEqualsOnJson method but still do not like the escaped double quotes in test assertions.