import static org.junit.jupiter.api.Assertions.*;

import org.junit.jupiter.api.Test;

class LargestNumberTest {

	@Test
	void test1() {
		String[] numbers = {"9", "4", "6", "1", "9"};
		assertEquals("99641", LargestNumber.getLargestNumber(numbers));
	}

	@Test
	void test2() {
		String[] numbers = {"21", "2"};
		assertEquals("221", LargestNumber.getLargestNumber(numbers));
	}

	@Test
	void test3() {
		String[] numbers = {"23", "39", "92"};
		assertEquals("923923", LargestNumber.getLargestNumber(numbers));
	}

	@Test
	void test4() {
		String[] numbers = {"23", "39", "92"};
		assertEquals("923923", LargestNumber.getLargestNumber(numbers));
	}

	@Test
	void test5() {
		String[] numbers = {"23", "2"};
		assertEquals("232", LargestNumber.getLargestNumber(numbers));
	}

	@Test
	void testCompareLeadingDigit() {
		assertTrue(LargestNumber.compareLeadingDigit("2", "21"));
	}

	@Test
	void testCompareLeadingDigit1() {
		assertFalse(LargestNumber.compareLeadingDigit("20", "21"));
	}

	@Test
	void testCompareLeadingDigit2() {
		assertFalse(LargestNumber.compareLeadingDigit("321", "322"));
	}

	@Test
	void testCompareLeadingDigit3() {
		assertFalse(LargestNumber.compareLeadingDigit("321", "32"));
	}

	@Test
	void testCompareLeadingDigit4() {
		assertFalse(LargestNumber.compareLeadingDigit("10", "1"));
	}

	@Test
	void testCompareLeadingDigit5() {
		assertTrue(LargestNumber.compareLeadingDigit("6", "10"));
	}

	@Test
	void testCompareLeadingDigit6() {
		assertTrue(LargestNumber.compareLeadingDigit("23", "2"));
	}

	@Test
	void testCompareLeadingDigit7() {
		assertTrue(LargestNumber.compareLeadingDigit("545", "54"));
	}

	@Test
	void testCompareLeadingDigit8() {
		assertTrue(LargestNumber.compareLeadingDigit("56", "565"));
	}
	
}