add unit test

utility/src/test/java/com/dua3/utility/text/AnsiConverterTest.java

@@ -0,0 +1,81 @@
+package com.dua3.utility.text;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class AnsiConverterTest {
+
+    @Test
+    void create() {
+        Style[] styles = {
+                Style.BOLD,
+                Style.ITALIC,
+                Style.UNDERLINE,
+                Style.LINE_THROUGH,
+                Style.RED
+        };
+        RichTextBuilder b = new RichTextBuilder();
+        b.push(Style.BOLD).append("AnsiConverterTest").pop(Style.BOLD);
+        b.append("\n");
+        for (int i = 0; i < (1 << styles.length); i++) {
+            StringBuilder sb = new StringBuilder("Styles:");
+            for (int j = 0; j < styles.length; j++) {
+                if ((i & (1 << j)) != 0) {
+                    b.push(styles[j]);
+                    sb.append(" ").append(styles[j].name());
+                }
+            }
+            b.append(sb);
+            for (int j = styles.length - 1; j >= 0; j--) {
+                if ((i & (1 << j)) != 0) {
+                    b.pop(styles[j]);
+                }
+            }
+            b.append("\n");
+        }
+        b.append("normal\n");
+        RichText rt = b.toRichText();
+
+        AnsiConverter converter = AnsiConverter.create();
+        String s = converter.convert(rt);
+        System.out.println(s);
+        String expected = """
+                AnsiConverterTest
+                Styles:
+                Styles: bold
+                Styles: italic
+                Styles: bold italic
+                Styles: underline
+                Styles: bold underline
+                Styles: italic underline
+                Styles: bold italic underline
+                Styles: line-through
+                Styles: bold line-through
+                Styles: italic line-through
+                Styles: bold italic line-through
+                Styles: underline line-through
+                Styles: bold underline line-through
+                Styles: italic underline line-through
+                Styles: bold italic underline line-through
+                Styles: red
+                Styles: bold red
+                Styles: italic red
+                Styles: bold italic red
+                Styles: underline red
+                Styles: bold underline red
+                Styles: italic underline red
+                Styles: bold italic underline red
+                Styles: line-through red
+                Styles: bold line-through red
+                Styles: italic line-through red
+                Styles: bold italic line-through red
+                Styles: underline line-through red
+                Styles: bold underline line-through red
+                Styles: italic underline line-through red
+                Styles: bold italic underline line-through red
+                normal
+                """;
+        assertEquals(expected, s);
+    }
+}