자동차경주-1단계-v1 (#5913)

Author: smileeeey

src/test/java/SetTest.java

@@ -0,0 +1,51 @@
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
+import org.junit.jupiter.params.provider.ValueSource;
+
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Set;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+
+public class SetTest {
+
+    private Set<Integer> numbers;
+
+    @BeforeEach
+    void SetUp() {
+        numbers = new HashSet<>(Arrays.asList(1,1,2,3));
+    }
+
+    @Test
+    void setSize() {
+        assertThat(numbers.size()).isEqualTo(3);
+    }
+
+    @Test
+    void contains() {
+        assertThat(numbers.contains(1)).isTrue();
+        assertThat(numbers.contains(2)).isTrue();
+        assertThat(numbers.contains(3)).isTrue();
+        assertThat(numbers.contains(4)).isFalse();
+    }
+
+    @ParameterizedTest
+    @ValueSource(ints = {1, 2, 3})
+    void contains(int number) {
+        assertThat(numbers.contains(number)).isTrue();
+    }
+
+    @ParameterizedTest
+    @CsvSource({
+            "1, true",
+            "2, true",
+            "3, true",
+            "4, false"
+    })
+    void contains(int number, boolean result) {
+        assertThat(numbers.contains(number)).isEqualTo(result);
+    }
+}

src/test/java/StringTest.java

@@ -0,0 +1,43 @@
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.AssertionsForClassTypes.*;
+
+public class StringTest {
+    private final String ASSERTJ_CONTAINS_TEST = "1,2";
+    private final String ASSERTJ_CONTAINS_EXACTLY_TEST = "1,";
+    private final String COMMA = ",";
+    private final String SUBSTRING_TEST = "(1,2)";
+    private final String CHARAT_TEST = "abc";
+
+    @Test
+    void assertJContains() {
+        assertThat(ASSERTJ_CONTAINS_TEST.split(COMMA)).contains("1");
+        assertThat(ASSERTJ_CONTAINS_TEST.split(COMMA)).contains("2");
+        assertThat(ASSERTJ_CONTAINS_TEST.split(COMMA)).doesNotContain("3");
+    }
+
+    @Test
+    void assertJContainsExactly() {
+        assertThat(ASSERTJ_CONTAINS_EXACTLY_TEST.split(COMMA)).containsExactly("1");
+    }
+
+    @Test
+    void substring() {
+        int lparenIndex = SUBSTRING_TEST.indexOf('(');
+        int rparenIndex = SUBSTRING_TEST.indexOf(')');
+        assertThat(SUBSTRING_TEST.substring(lparenIndex+1, rparenIndex)).isEqualTo(ASSERTJ_CONTAINS_TEST);
+    }
+
+    @DisplayName("특정 위치의 문자를 반환한다. 위치 값을 벗어나면 StringIndexOutOfBoundsException 발생한다.")
+    @Test
+    void chatAt() {
+        int outOfBoundIndex = 4;
+
+        assertThat(CHARAT_TEST.charAt(1)).isEqualTo('b');
+        assertThatExceptionOfType(StringIndexOutOfBoundsException.class)
+                .isThrownBy(() -> {
+                    CHARAT_TEST.charAt(outOfBoundIndex);
+                }).withMessage("String index out of range: %d", outOfBoundIndex);
+    }
+}