com.github.nylle.javafixture.annotations.testcases.ReflectedTestCase Maven / Gradle / Ivy

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JavaFixture is the attempt to bring Mark Seemann's AutoFixture for .NET to the Java world. Its purpose is to generate full object graphs for use in test suites with a fluent API for customising the test objects during generation.

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package com.github.nylle.javafixture.annotations.testcases;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import static java.util.Arrays.stream;

public class ReflectedTestCase {

    private Map, List> matrix = new HashMap<>();

    public ReflectedTestCase(TestCase testCase) {
        stream(TestCase.class.getDeclaredMethods())
                .sorted(Comparator.comparing(Method::getName))
                .forEachOrdered(m -> matrix.compute(m.getReturnType(), (k, v) -> addTo(v, invoke(m, testCase))));
    }

    @SuppressWarnings("unchecked")
    public  T getTestCaseValueFor(Class type, int i) {
        return (T) matrix.get(type).get(i);
    }

    @SuppressWarnings("unchecked")
    private  T invoke(Method method, TestCase testCase) {
        try {
            return (T) method.invoke(testCase);
        } catch (IllegalAccessException | InvocationTargetException e) {
            throw new TestCaseException(String.format("Unable to read test-case value for '%s'", method.getName()), e);
        }
    }

    private  List addTo(List list, T value) {
        if(list == null) {
            list = new ArrayList<>();
        }

        list.add(value);
        return list;
    }

}