TestAVarietyOfValues.md

How to Test a Variety of Values for One Input

Contents

• When to use Approvals::verifyAll()
• Steps
• Tables

When to use Approvals::verifyAll()

When you want to test a lot of variations for a single input value.

If you have more than one parameter that you want to vary, check out Testing Combinations.

Steps

1. Copy this starter text.

String[] inputs = {"input.value1", "input.value2"};
Approvals.verifyAll("TITLE", inputs, s -> "placeholder " + s);

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2. Modify the input container for your chosen values.
3. Run it, and make sure that you have your inputs wired up correctly.

If they are wired up correctly, you will see a file that looks like this: the lambda is responsible for both the execution and formatting of the result.

TITLE


placeholder input.value1
placeholder input.value2

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4. Replace the "placeholder" with a call to the functionality that you want to test.
5. Change the TITLE to something meaningful
6. Run it, and approve the output.

Tables

Another way to test a variety of inputs is to use a MarkdownTable. Here's an example:

String[] inputs = {"verify json", "verify all", "verify parameters", "verify as json"};
VerifiableMarkdownTable table = VerifiableMarkdownTable.withHeaders("Input", "Camel Case", "Snake Case",
    "Kebab Case");
table.addRowsForInputs(inputs, this::toCamelCase, this::toSnakeCase, this::toKebabCase);
Approvals.verify(table);

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which will produce:

Input	Camel Case	Snake Case	Kebab Case
verify json	verifyJson	verify_json	verify-json
verify all	verifyAll	verify_all	verify-all
verify parameters	verifyParameters	verify_parameters	verify-parameters
verify as json	verifyAsJson	verify_as_json	verify-as-json

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