CodeRun/src/test/java/quickStart/QuickStartExercise08Test.java - develop - javapractice/JavaPractice

CodeRun/src/test/java/quickStart/QuickStartExercise08Test.java
139 строк3 KB
Кузьма Даждъбогин
TSKJVPRCTC5-14
15 янв 2026, 15:13
15 янв 2026, 15:1318b5c27
package quickStart;

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

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.PrintStream;
import java.nio.charset.StandardCharsets;

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

class QuickStartExercise08Test {

    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, true, StandardCharsets.UTF_8));
    }

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

    void provideInput(String data) {
        testIn = new ByteArrayInputStream(data.getBytes(StandardCharsets.UTF_8));
        System.setIn(testIn);
    }

    String getOutput() {
        return testOut.toString(StandardCharsets.UTF_8).trim();
    }

    @Test
    void firstChance_shouldReturnYesForStrictlyIncreasingSequence() throws Exception {
        // Given
        provideInput("1 3 5 7");

        // When
        QuickStartExercise08.firstChance();

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

    @Test
    void firstChance_shouldReturnNoForEqualElements() throws Exception {
        // Given
        provideInput("1 2 2 4");

        // When
        QuickStartExercise08.firstChance();

        // Then
        assertEquals("NO", getOutput());
    }

    @Test
    void firstChance_shouldReturnNoForDecreasingSequence() throws Exception {
        // Given
        provideInput("5 4 3 2 1");

        // When
        QuickStartExercise08.firstChance();

        // Then
        assertEquals("NO", getOutput());
    }

    @Test
    void firstChance_shouldHandleSingleElement() throws Exception {
        // Given
        provideInput("42");

        // When
        QuickStartExercise08.firstChance();

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

    @Test
    void secondChance_shouldReturnYesForStrictlyIncreasingSequence() throws Exception {
        // Given
        provideInput("1 3 5 7");

        // When
        QuickStartExercise08.secondChance();

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

    @Test
    void secondChance_shouldReturnNoForEqualElements() throws Exception {
        // Given
        provideInput("1 2 2 4");

        // When
        QuickStartExercise08.secondChance();

        // Then
        assertEquals("NO", getOutput());
    }

    @Test
    void secondChance_shouldReturnNoForDecreasingSequence() throws Exception {
        // Given
        provideInput("5 4 3 2 1");

        // When
        QuickStartExercise08.secondChance();

        // Then
        assertEquals("NO", getOutput());
    }

    @Test
    void secondChance_shouldHandleSingleElement() throws Exception {
        // Given
        provideInput("42");

        // When
        QuickStartExercise08.secondChance();

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