public void testGetSubstring() {
final String text = "one two three";
final TextInput ti = new TextInput(text);
assertEquals("", ti.getSubstring(text.length(), text.length()));
assertEquals("", ti.getSubstring(-1, -1));
assertEquals("", (new TextInput("")).getSubstring(-100, 100));
assertEquals("", (new TextInput("")).getSubstring(100, -100));
assertEquals("", ti.getSubstring(0, 0));
assertEquals("", ti.getSubstring(text.length(), 0));
assertEquals("", ti.getSubstring(text.length(), text.length() + 1));
assertEquals("e", ti.getSubstring(text.length() - 1, text.length() + 1));
assertEquals("e", ti.getSubstring(text.length() - 1, text.length()));
assertEquals("", ti.getSubstring(text.length() + 1, 0));
assertEquals("", ti.getSubstring(text.length() + 1, text.length()));
assertEquals("", ti.getSubstring(text.length() + 1, -1));
assertEquals(text, ti.getSubstring(-10, 999));
assertEquals(text, ti.getSubstring(-10, text.length()));
assertEquals(text, ti.getSubstring(0, 997));
assertEquals("one", ti.getSubstring(-1, 3));
assertEquals("thre", ti.getSubstring(8, text.length() - 1));
assertEquals("three", ti.getSubstring(8, text.length()));
assertEquals("three", ti.getSubstring(8, text.length() + 1));
assertEquals("two", ti.getSubstring(4, 7));
}
