is there any sneaky thing?

Question about the task

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We've tested our strategies many times using the Solution class's testStrategy() method. It's time to use JUnit to write real unit tests.
14.1. Read about unit tests.
14.2. Download and connect the JUnit 4.12 library. Figure out how to use it. The JUnit library depends on the hamcrest-core library. Connect it as well. Use version 1.3.
14.3. Add a FunctionalTest class to the tests package. In this class, we'll check the functionality of our strategies.
14.4. Add a testStorage(Shortener shortener) method to the FunctionalTest class. It must:
14.4.1. Create three strings. String 1 and 3 should be the same.
14.4.2. Get and save identifiers for all three strings using shortener.
14.4.3. Check that the identifier for String 2 is not equal to the identifier for Strings 1 and 3.

Hint: Assert.assertNotEquals method.

14.4.4. Check that the identifiers for Strings 1 and 3 are equal.

Hint: Assert.assertEquals method.

14.4.5. Use shortner to get three strings for three ids.
14.4.6. Check that the strings obtained in the preceding item are the same as the original.

Hint: Assert.assertEquals method.

14.5. Add tests to the FunctionalTest class:
14.5.1. testHashMapStorageStrategy()
14.5.2. testOurHashMapStorageStrategy()
14.5.3. testFileStorageStrategy()
14.5.4. testHashBiMapStorageStrategy()
14.5.5. testDualHashBidiMapStorageStrategy()
14.5.6. testOurHashBiMapStorageStrategy()
Each test must have a @Test annotation. Create the appropriate strategy. Create a Shortener object based on the strategy and call the corresponding testStorage method.
Run the program and verify that all tests pass.

Requirements:

The FunctionalTest class must be added to the created tests package.
In the testStorage method, the getId and getString methods must be called three times.
The test methods listed in the task conditions should be marked only with the @Test annotation.
Each test method must call the testStorage method.

package com.codegym.task.task33.task3310; import com.codegym.task.task33.task3310.strategy.*; import java.util.*; public class Solution { public static Set<Long> getIds(Shortener shortener, Set<String> strings) { Set<Long> set = new HashSet<>(); for (String str : strings) { set.add(shortener.getId(str)); } return set; } public static Set<String> getStrings(Shortener shortener, Set<Long> keys) { Set<String> set = new HashSet<>(); for (Long l : keys) { set.add(shortener.getString(l)); } return set; } public static void testStrategy(StorageStrategy strategy, long elementsNumber) { Helper.printMessage(strategy.getClass().getSimpleName()); Set<String> set = new HashSet<>(); Set<Long> set2 = new HashSet<>(); Set<String> set3 = new HashSet<>(); for (int i = 0; i < elementsNumber; i++) { String testString = Helper.generateRandomString(); set.add(testString); } Shortener sr = new Shortener(strategy); Date startD = new Date(); for (String string : set) { set2.add(sr.getId(string)); } Helper.printMessage(new Date().getTime() - startD.getTime() + ""); startD = new Date(); for (Long long1 : set2) { set3.add(sr.getString(long1)); } Helper.printMessage(new Date().getTime() - startD.getTime() + ""); if (set.containsAll(set3)) Helper.printMessage("The test passed."); else Helper.printMessage("The test failed."); } public static void main(String[] args) { testStrategy(new OurHashMapStorageStrategy(), 10000); } }

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Wei Cui

Level 39 , Newark, United States

22 April 2020, 01:39

solution

I guess your format is wrong

@Test
    public void testHashMapStorageStrategy() {
        HashMapStorageStrategy hashMapStorageStrategy = new HashMapStorageStrategy();
        Shortener shortener = new Shortener(hashMapStorageStrategy);
        testStorage(shortener);

    }

    @Test
    public void testOurHashMapStorageStrategy()
    {
        StorageStrategy ourHashMapStorageStrategy = new OurHashMapStorageStrategy();
        Shortener shortener = new Shortener(ourHashMapStorageStrategy);
        testStorage(shortener);
    }
    @Test
    public void testFileStorageStrategy()
    {
        FileStorageStrategy fileStorageStrategy = new FileStorageStrategy();
        Shortener shortener = new Shortener(fileStorageStrategy);
        testStorage(shortener);
    }
    @Test
    public void testHashBiMapStorageStrategy()
    {
        HashBiMapStorageStrategy hashBiMapStorageStrategy = new HashBiMapStorageStrategy();
        Shortener shortener = new Shortener(hashBiMapStorageStrategy);
        testStorage(shortener);
    }
    @Test
    public void testDualHashBidiMapStorageStrategy()
    {
        DualHashBidiMapStorageStrategy dualHashBidiMapStorageStrategy = new DualHashBidiMapStorageStrategy();
        Shortener shortener = new Shortener(dualHashBidiMapStorageStrategy);
        testStorage(shortener);
    }
    @Test
    public void testOurHashBiMapStorageStrategy()
    {
        OurHashBiMapStorageStrategy ourHashBiMapStorageStrategy = new OurHashBiMapStorageStrategy();
        Shortener shortener = new Shortener(ourHashBiMapStorageStrategy);
        testStorage(shortener);
    }

yz Backend Developer

22 April 2020, 02:14

oh man thank you! it worked