fakingXmocking.CurrencyConversionTest.java Source code

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Here is the source code for fakingXmocking.CurrencyConversionTest.java

Source

/*
 * Copyright (c) 2006-2011 Rogrio Liesenfeld
 * This file is subject to the terms of the MIT license (see LICENSE.txt).
 */
package fakingXmocking;

import java.math.*;
import java.util.*;

import org.apache.http.*;
import org.apache.http.client.*;
import static org.junit.Assert.*;
import org.junit.*;

import mockit.*;

public final class CurrencyConversionTest {
    @Capturing // so that any class implementing the base type gets mocked
    @Cascading // so that intermediate objects obtained from chained calls get mocked
    HttpClient httpClient;

    @Mocked
    HttpEntity httpEntity; // provides access to the intermediate (cascaded) object

    @Test
    public void loadCurrencySymbolsFromWebSite() throws Exception {
        new Expectations() {
            {
                httpEntity.getContent();
                result = "<h3>Currency Data\r\n <td valign=top>USD</td>\r\n <td valign=top>EUR</td>";
            }
        };

        List<String> symbols = CurrencyConversion.currencySymbols();

        assertEquals(Arrays.asList("USD", "EUR"), symbols);
    }

    // A reusable expectation block, in case we were to need it in multiple tests.
    final class CurrencySymbolsExpectations extends NonStrictExpectations {
        CurrencySymbolsExpectations() {
            super(CurrencyConversion.class); // partial mocking of the class

            CurrencyConversion.currencySymbols();
            returns("X", "Y");
        }
    }

    @Test
    public void convertFromOneCurrencyToAnother() throws Exception {
        new CurrencySymbolsExpectations();

        // Why strict expectations? To verify the requirement that a live Web site gets accessed.
        new Expectations() {
            {
                httpEntity.getContent();
                result = "<div id=\"converter_results\"><ul><li><b>1 X = 1.3 Y</b>";
            }
        };

        BigDecimal rate = CurrencyConversion.convertFromTo("X", "Y");

        assertEquals("1.3", rate.toPlainString());
    }
}