feat: add some tests for ArgsConnectUtils.connect and StringUtil.repeat

Author: sysnote8main

src/main/java/net/azisaba/ryuzupluginchat/util/StringUtil.java

@@ -0,0 +1,11 @@
+package net.azisaba.ryuzupluginchat.util;
+
+public class StringUtil {
+    public static String repeat(String str, int count) {
+        StringBuilder sb = new StringBuilder(str.length() * count);
+        for (int i = 0; i < count; i++) {
+            sb.append(str);
+        }
+        return sb.toString();
+    }
+}

src/test/java/net/azisaba/ryuzupluginchat/util/TestArgsConnectUtils.java

@@ -0,0 +1,47 @@
+package net.azisaba.ryuzupluginchat.util;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import java.util.stream.Stream;
+
+import static net.azisaba.ryuzupluginchat.util.StringUtil.repeat;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class TestArgsConnectUtils {
+    @ParameterizedTest(name = "[{index}] {0} => \"{1}\"")
+    @MethodSource("provideConnectTestCases")
+    @DisplayName("connect Test Cases")
+    void testConnect(String[] input, String expected) {
+        assertEquals(expected, ArgsConnectUtils.connect(input));
+    }
+
+    public static Stream<Arguments> provideConnectTestCases() {
+        return Stream.of(
+                Arguments.of(
+                        new String[]{"Hello", "world"}, "Hello world"),
+                Arguments.of(
+                        new String[]{"The", "quick", "brown", "fox"}, "The quick brown fox"),
+                Arguments.of(
+                        new String[]{}, ""),
+                Arguments.of(
+                        new String[]{"single"}, "single"),
+                Arguments.of(
+                        new String[]{"a", "", "b"}, "a  b"),
+                Arguments.of(
+                        new String[]{" a", "b ", " c "}, " a b   c "),
+                Arguments.of(
+                        new String[]{"こんにちは", "世界"}, "こんにちは 世界"),
+                Arguments.of(
+                        new String[]{"123", "456"}, "123 456"),
+                Arguments.of(
+                        new String[]{"@#", "$%^", "&*()"}, "@# $%^ &*()"),
+                Arguments.of(
+                        new String[]{repeat("a", 1000), repeat("b", 1000)},
+                        repeat("a", 1000) + " " + repeat("b", 1000)
+                )
+        );
+    }
+}

src/test/java/net/azisaba/ryuzupluginchat/util/TestStringUtil.java

@@ -0,0 +1,30 @@
+package net.azisaba.ryuzupluginchat.util;
+
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import java.util.stream.Stream;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class TestStringUtil {
+    @ParameterizedTest(name = "[{index}] repeat(\"{0}\", {1}) => \"{2}\"")
+    @MethodSource("provideRepeatCases")
+    void testRepeat(String input, int count, String expected) {
+        assertEquals(expected, StringUtil.repeat(input, count));
+    }
+
+    static Stream<Arguments> provideRepeatCases() {
+        return Stream.of(
+                Arguments.of("a", 3, "aaa"),
+                Arguments.of("abc", 2, "abcabc"),
+                Arguments.of("", 5, ""),               // 空文字の繰り返し
+                Arguments.of("x", 0, ""),              // 0回の繰り返し
+                Arguments.of("あ", 3, "あああ"),        // Unicode 文字
+                Arguments.of(" ", 4, "    "),           // 空白文字
+                Arguments.of("ab", 1, "ab"),            // 1回繰り返し
+                Arguments.of("xy", 5, "xyxyxyxyxy")     // 複数回・複数文字
+        );
+    }
+}