Initial commit: LoChat v1.0.0 with Gradient module

src/test/java/com/loki/lochat/gradient/util/GradientUtilTest.java

@@ -0,0 +1,134 @@
+package com.loki.lochat.gradient.util;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class GradientUtilTest {
+
+    @Test
+    void isValidHex_valid() {
+        assertTrue(GradientUtil.isValidHex("#FF0000"));
+        assertTrue(GradientUtil.isValidHex("#00ff00"));
+        assertTrue(GradientUtil.isValidHex("#3BA8FF"));
+        assertTrue(GradientUtil.isValidHex("#000000"));
+        assertTrue(GradientUtil.isValidHex("#FFFFFF"));
+    }
+
+    @Test
+    void isValidHex_invalid() {
+        assertFalse(GradientUtil.isValidHex("FF0000"));      // без #
+        assertFalse(GradientUtil.isValidHex("#FF00"));       // короткий
+        assertFalse(GradientUtil.isValidHex("#FF00000"));    // длинный
+        assertFalse(GradientUtil.isValidHex("#GGGGGG"));     // невалидные символы
+        assertFalse(GradientUtil.isValidHex(""));
+    }
+
+    @Test
+    void isValidHex_null() {
+        assertThrows(NullPointerException.class, () -> GradientUtil.isValidHex(null));
+    }
+
+    @Test
+    void applyGradient_singleColor_legacy() {
+        String result = GradientUtil.applyGradient("Hi", List.of("#FF0000"), true);
+        assertNotNull(result);
+        assertTrue(result.contains("&#ff0000"));
+        assertEquals("&#ff0000H&#ff0000i", result);
+    }
+
+    @Test
+    void applyGradient_singleColor_minimessage() {
+        String result = GradientUtil.applyGradient("Hi", List.of("#FF0000"), false);
+        assertNotNull(result);
+        assertTrue(result.contains("<#ff0000>"));
+    }
+
+    @Test
+    void applyGradient_twoColors() {
+        String result = GradientUtil.applyGradient("AB", List.of("#FF0000", "#0000FF"), true);
+        assertNotNull(result);
+        // Первый символ должен быть красным, последний синим
+        assertTrue(result.startsWith("&#ff0000A"));
+        assertTrue(result.contains("&#0000ffB"));
+    }
+
+    @Test
+    void applyGradient_emptyText() {
+        String result = GradientUtil.applyGradient("", List.of("#FF0000"), true);
+        assertEquals("", result);
+    }
+
+    @Test
+    void applyGradient_nullText() {
+        String result = GradientUtil.applyGradient(null, List.of("#FF0000"), true);
+        assertNull(result);
+    }
+
+    @Test
+    void applyGradient_emptyColors() {
+        String result = GradientUtil.applyGradient("Test", List.of(), true);
+        assertEquals("Test", result);
+    }
+
+    @Test
+    void applyGradient_nullColors() {
+        String result = GradientUtil.applyGradient("Test", null, true);
+        assertEquals("Test", result);
+    }
+
+    @Test
+    void applyGradient_multipleColors() {
+        String result = GradientUtil.applyGradient("ABC", List.of("#FF0000", "#00FF00", "#0000FF"), true);
+        assertNotNull(result);
+        // Должен содержать цветовые коды для каждого символа
+        assertTrue(result.contains("A"));
+        assertTrue(result.contains("B"));
+        assertTrue(result.contains("C"));
+    }
+
+    @Test
+    void buildDisplayName_noPrefix_noColors() {
+        String result = GradientUtil.buildDisplayName(null, "Player", null, true, true, "[{prefix}] ", true);
+        assertEquals("Player", result);
+    }
+
+    @Test
+    void buildDisplayName_withPrefix_noColors() {
+        String result = GradientUtil.buildDisplayName("VIP", "Player", null, true, true, "[{prefix}] ", true);
+        assertEquals("[VIP] Player", result);
+    }
+
+    @Test
+    void buildDisplayName_noPrefix_withColors() {
+        String result = GradientUtil.buildDisplayName(null, "AB", List.of("#FF0000", "#0000FF"), true, true, "[{prefix}] ", true);
+        assertNotNull(result);
+        assertTrue(result.contains("&#"));
+    }
+
+    @Test
+    void buildDisplayName_withPrefix_withColors_continuous() {
+        String result = GradientUtil.buildDisplayName("V", "AB", List.of("#FF0000", "#0000FF"), true, true, "[{prefix}] ", true);
+        assertNotNull(result);
+        // Единый градиент на всё
+        assertTrue(result.contains("&#"));
+    }
+
+    @Test
+    void buildDisplayName_withPrefix_withColors_separate() {
+        String result = GradientUtil.buildDisplayName("V", "AB", List.of("#FF0000", "#0000FF"), true, false, "[{prefix}] ", true);
+        assertNotNull(result);
+        // Отдельные градиенты
+        assertTrue(result.contains("&#"));
+    }
+
+    @Test
+    void buildDisplayName_gradientOnlyOnNick() {
+        String result = GradientUtil.buildDisplayName("VIP", "AB", List.of("#FF0000", "#0000FF"), false, false, "[{prefix}] ", true);
+        assertNotNull(result);
+        // Префикс без градиента
+        assertTrue(result.startsWith("[VIP] "));
+    }
+}