CodeRun/src/test/java/quickStart/QuickStartExercise07Test.java - develop - javapractice/JavaPractice

CodeRun/src/test/java/quickStart/QuickStartExercise07Test.java

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Кузьма Даждъбогин

f/TSKJVPRCTC5-13

14 янв 2026, 16:33

14 янв 2026, 16:3344c488b

package quickStart;

import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

import java.io.*;

import static org.junit.jupiter.api.Assertions.assertEquals;

class QuickStartExercise07Test {

    private final InputStream systemIn = System.in;
    private final PrintStream systemOut = System.out;

    private ByteArrayInputStream testIn;
    private ByteArrayOutputStream testOut;

    @BeforeEach
    void setUp() {
        testOut = new ByteArrayOutputStream();
        System.setOut(new PrintStream(testOut));
    }

    @AfterEach
    void tearDown() {
        System.setIn(systemIn);
        System.setOut(systemOut);
    }

    void provideInput(String data) {
        testIn = new ByteArrayInputStream(data.getBytes());
        System.setIn(testIn);
    }

    String getOutput() {
        return testOut.toString().trim();
    }

    @Test
    void main_shouldCountDistinctWords_WhenInputHasMultipleSpacesAndLines() throws Exception {
        // Given
        String input = "She sells sea shells on the sea shore;\n" +
                "The shells that she sells are sea shells I'm sure.\n" +
                "So if she sells sea shells on the sea shore,\n" +
                "I'm sure that the shells are sea shore shells.\n";
        provideInput(input);

        // When
        QuickStartExercise07.main(new String[]{});

        // Then
        assertEquals("19", getOutput());
    }

    @Test
    void main_shouldReturnZero_WhenInputIsEmpty() throws Exception {
        // Given
        String input = "";
        provideInput(input);

        // When
        QuickStartExercise07.main(new String[]{});

        // Then
        assertEquals("0", getOutput());
    }

    @Test
    void main_shouldHandleSingleWord() throws Exception {
        // Given
        String input = "hello";
        provideInput(input);

        // When
        QuickStartExercise07.main(new String[]{});

        // Then
        assertEquals("1", getOutput());
    }

    @Test
    void main_shouldIgnoreExtraWhitespace() throws Exception {
        // Given
        String input = "   word    word   \n\n   word  ";
        provideInput(input);

        // When
        QuickStartExercise07.main(new String[]{});

        // Then
        assertEquals("1", getOutput());
    }
}