[K/N] Migrate runtime/text tests to new testing infra ^KT-61259

kotlin-native/runtime/test/text/CharNativeTest.kt

@@ -63,10 +63,59 @@ class CharNativeTest {
         assertEquals("\u0069\u0307", '\u0130'.lowercase())
     }
 
+    @Test
     fun titlecase() {
         // titlecase = titlecaseChar = char != uppercaseChar
         assertEquals('\u10F0'.titlecaseChar().toString(), '\u10F0'.titlecase())
         assertEquals('\u10F0', '\u10F0'.titlecaseChar())
         assertNotEquals('\u10F0', '\u10F0'.uppercaseChar())
     }
+
+    @Test
+    fun testIsSupplementaryCodePoint() {
+        assertFalse(Char.isSupplementaryCodePoint(-1))
+        for (c in 0..0xFFFF) {
+            assertFalse(Char.isSupplementaryCodePoint(c.toInt()))
+        }
+        for (c in 0xFFFF + 1..0x10FFFF) {
+            assertTrue(Char.isSupplementaryCodePoint(c))
+        }
+        assertFalse(Char.isSupplementaryCodePoint(0x10FFFF + 1))
+    }
+
+    @Test
+    fun isSurrogatePair() {
+        assertFalse(Char.isSurrogatePair('\u0000', '\u0000'))
+        assertFalse(Char.isSurrogatePair('\u0000', '\uDC00'))
+        assertTrue( Char.isSurrogatePair('\uD800', '\uDC00'))
+        assertTrue( Char.isSurrogatePair('\uD800', '\uDFFF'))
+        assertTrue( Char.isSurrogatePair('\uDBFF', '\uDFFF'))
+        assertFalse(Char.isSurrogatePair('\uDBFF', '\uF000'))
+    }
+
+    @Test
+    fun toChars() {
+        assertContentEquals(Char.toChars(0x010000), charArrayOf('\uD800', '\uDC00'))
+        assertContentEquals(Char.toChars(0x010001), charArrayOf('\uD800', '\uDC01'))
+        assertContentEquals(Char.toChars(0x010401), charArrayOf('\uD801', '\uDC01'))
+        assertContentEquals(Char.toChars(0x10FFFF), charArrayOf('\uDBFF', '\uDFFF'))
+
+        assertFailsWith<IllegalArgumentException> { Char.toChars(Int.MAX_VALUE) }
+    }
+
+    @Test
+    fun toCodePoint() {
+        assertEquals(0x010000, Char.toCodePoint('\uD800', '\uDC00'))
+        assertEquals(0x010001, Char.toCodePoint('\uD800', '\uDC01'))
+        assertEquals(0x010401, Char.toCodePoint('\uD801', '\uDC01'))
+        assertEquals(0x10FFFF, Char.toCodePoint('\uDBFF', '\uDFFF'))
+    }
+
+    @Test
+    fun category() {
+        assertTrue('<'      in CharCategory.MATH_SYMBOL)
+        assertTrue(';'      in CharCategory.OTHER_PUNCTUATION)
+        assertTrue('_'      in CharCategory.CONNECTOR_PUNCTUATION)
+        assertTrue('$'      in CharCategory.CURRENCY_SYMBOL)
+    }
 }