universe@23: package de.uapcore.sudoku;
universe@23: 
universe@23: import org.junit.jupiter.api.Test;
universe@23: 
universe@23: import static org.junit.jupiter.api.Assertions.*;
universe@23: 
universe@23: class SolverTest {
universe@23: 
universe@23:     private int[] createTestdata() {
universe@23:         return new int[]{
universe@23:                 0,1,0,9,0,0,8,0,0,
universe@23:                 0,0,0,0,0,8,0,0,4,
universe@23:                 6,0,5,0,0,0,7,0,0,
universe@23:                 0,9,0,0,6,0,0,0,8,
universe@23:                 0,0,0,2,0,7,0,0,0,
universe@23:                 8,0,0,0,3,0,0,6,0,
universe@23:                 0,0,2,0,0,0,5,0,3,
universe@23:                 1,0,0,4,0,0,0,0,0,
universe@23:                 0,0,6,0,0,2,0,1,0};
universe@23:     }
universe@23: 
universe@23:     private int[] createTestdataSolved() {
universe@23:         return new int[]{
universe@23:                 4,1,7,9,2,5,8,3,6,
universe@23:                 3,2,9,6,7,8,1,5,4,
universe@23:                 6,8,5,3,4,1,7,9,2,
universe@23:                 2,9,1,5,6,4,3,7,8,
universe@23:                 5,6,3,2,8,7,9,4,1,
universe@23:                 8,7,4,1,3,9,2,6,5,
universe@23:                 9,4,2,7,1,6,5,8,3,
universe@23:                 1,5,8,4,9,3,6,2,7,
universe@23:                 7,3,6,8,5,2,4,1,9};
universe@23:     }
universe@23: 
universe@23:     private Field createTestField(int[] testdata) {
universe@23:         final var field = new Field();
universe@23:         for (int x = 0 ; x < 9 ; x++) {
universe@23:             for (int y = 0 ; y < 9 ; y++) {
universe@23:                 field.setCellValue(x, y, testdata[x+9*y]);
universe@23:             }
universe@23:         }
universe@23:         return field;
universe@23:     }
universe@23: 
universe@23: 
universe@23:     @Test
universe@23:     void solveSuccess() {
universe@23:         final var field = createTestField(createTestdata());
universe@23:         final var solvedField = createTestField(createTestdataSolved());
universe@23:         assertTrue(new Solver().solve(field));
universe@23:         for (int x = 0 ; x < 9 ; x++) {
universe@23:             for (int y = 0 ; y < 9 ; y++) {
universe@23:                 assertEquals(solvedField.getCellValue(x, y), field.getCellValue(x, y));
universe@23:             }
universe@23:         }
universe@23:     }
universe@23: 
universe@23:     @Test
universe@23:     void solvingSetsModifiedStates() {
universe@23:         final var originalField = createTestField(createTestdata());
universe@23:         final var field = createTestField(createTestdata());
universe@23:         assertTrue(new Solver().solve(field));
universe@23:         for (int x = 0 ; x < 9 ; x++) {
universe@23:             for (int y = 0 ; y < 9 ; y++) {
universe@23:                 if (originalField.isCellEmpty(x, y)) {
universe@23:                     assertTrue(field.isCellModified(x, y));
universe@23:                 } else {
universe@23:                     assertFalse(field.isCellModified(x, y));
universe@23:                 }
universe@23:             }
universe@23:         }
universe@23:     }
universe@23: 
universe@23:     @Test
universe@23:     void checkSuccess() {
universe@23:         final var field = createTestField(createTestdata());
universe@23:         assertTrue(new Solver().check(field));
universe@23:         assertFalse(field.isAnyCellModified());
universe@23:     }
universe@23: 
universe@23:     @Test
universe@23:     void solveFail() {
universe@23:         final var originalField = createTestField(createTestdata());
universe@23:         final var field = createTestField(createTestdata());
universe@23:         originalField.setCellValue(0, 3, 5);
universe@23:         field.setCellValue(0, 3, 5);
universe@23:         assertTrue(new Solver().check(field));
universe@23:         assertFalse(new Solver().solve(field));
universe@23:         for (int x = 0 ; x < 9 ; x++) {
universe@23:             for (int y = 0 ; y < 9 ; y++) {
universe@23:                 if (originalField.isCellEmpty(x, y)) {
universe@23:                     assertTrue(field.isCellEmpty(x, y));
universe@23:                 } else {
universe@23:                     assertFalse(field.isCellEmpty(x, y));
universe@23:                     assertFalse(field.isCellModified(x, y));
universe@23:                 }
universe@23:             }
universe@23:         }
universe@23:     }
universe@23: 
universe@23:     @Test
universe@23:     void checkFail() {
universe@23:         final var field = createTestField(createTestdata());
universe@23:         field.setCellValue(4, 6, 4);
universe@23:         assertFalse(new Solver().check(field));
universe@23:         assertFalse(field.isAnyCellModified());
universe@23:     }
universe@23: }