7. Simple formulas with errors

src/Spreadsheet.java

@@ -1,18 +1,85 @@
 
 public class Spreadsheet {
 
+	String[][] matrix = new String [26][1000];
+	char[] alphabet = {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'};
+
+	public Spreadsheet(){}
+
+	public Spreadsheet(String[][] matrix, char[] alphabet) {
+		super();
+		this.matrix = matrix;
+		this.alphabet = alphabet;		
+	}
+
+	public String[][] getMatrix() {
+		return matrix;
+	}
+
+	public void setMatrix(String[][] matrix) {
+		this.matrix = matrix;
+	}
+
+	public char[] getAlphabet() {
+		return alphabet;
+	}
+
+	public void setAlphabet(char[] alphabet) {
+		this.alphabet = alphabet;
+	}
+
 	public String get(String cell) {
 		// to be implemented
+		char letra = cell.charAt(0);
+		char num = cell.charAt(1);
+		for (int i = 0; i < alphabet.length; i++) {
+			if(alphabet[i] == letra){ // You know if its A, B ...
+
+				String value = matrix[i][num];
+
+				if(value.startsWith("'") && value.endsWith("'")){
+					return value.substring(1, value.length()-1);
+				}else if(value.startsWith("'") && value.endsWith("")){
+					return "#Error";
+				}else if(value.startsWith("") && value.endsWith("'") && !value.startsWith("=")){
+					return "#Error";
+				}else if(value.startsWith("='") && value.endsWith("'"))
+					return value.substring(2, value.length()-1);
+
+
+				try {
+					Integer.parseInt(value);
+					return value;
+				} catch (NumberFormatException nfe){
+					return "#Error";
+				}
+			}
+
+		}
 		return null;
 	}
-
+
+
 	public void set(String cell, String value) {
 		// to be implemented
+
+		char letra = cell.charAt(0);
+		char num = cell.charAt(1);
+		for (int i = 0; i < alphabet.length; i++) {
+			if(alphabet[i] == letra){ 
+				matrix[i][num] = value;
+			}
+		}
 	}
-	
+
 	public String evaluate(String cell) {
 		// to be implemented
+
 		return null;
+
+
 	}
-
+
+
+
 }

tests/SpreadsheetTest.java

@@ -7,9 +7,50 @@
 public class SpreadsheetTest {
 
 	@Test
-	public void test() {
-		fail("Not yet implemented");
+	public void testGet() {
+		Spreadsheet ss = new Spreadsheet();
 
+		ss.set("A3", "3");
+		assertEquals("3", ss.get("A3"));
 	}
-
+
+	@Test
+	public void testGet2() {
+		Spreadsheet ss = new Spreadsheet();
+
+		ss.set("A3", "3A");
+		assertEquals("#Error", ss.get("A3"));
+	}
+	@Test
+	public void testGet3() {
+		Spreadsheet ss = new Spreadsheet();
+
+		ss.set("A3", "'is a String'");
+		assertEquals("is a String", ss.get("A3"));
+	}
+
+	@Test
+	public void testGet4() {
+		Spreadsheet ss = new Spreadsheet();
+
+		ss.set("A3", "'3A");
+		assertEquals("#Error", ss.get("A3"));
+	}
+
+	@Test
+	public void testGet5() {
+		Spreadsheet ss = new Spreadsheet();
+
+		ss.set("A3", "3A'");
+		assertEquals("#Error", ss.get("A3"));
+	}
+
+	@Test
+	public void testGet6() {
+		Spreadsheet ss = new Spreadsheet();
+
+		ss.set("A3", "='a String'");
+		assertEquals("a String",ss.get("A3"));
+	}
+
 }