[+] Added StatementParser, [~] Restructured the Parsers

1 files changed, 91 insertions, 0 deletions

diff --git a/calculator-java/src/test/java/StatementParserTest.java b/calculator-java/src/test/java/StatementParserTest.java
new file mode 100644
index 0000000..4b2e635
--- /dev/null
+++ b/calculator-java/src/test/java/StatementParserTest.java
@@ -0,0 +1,91 @@
+import ch.bfh.CalculatorLexer;
+import ch.bfh.parser.StatementParser;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class StatementParserTest {
+
+    StatementParser sp = new StatementParser();
+    // Only testing correct expressions first
+    @Test
+    public void emptyExpression() {
+        sp.parseStatement("");
+        assertEquals(0.0, sp.getValue(), 0.0);
+    }
+
+    @Test
+    public void oneFactor() {
+        sp.parseStatement("10");
+        assertEquals(10.0, sp.getValue(), 0.0);
+    }
+
+    @Test
+    public void oneParenthesisedFactor() {
+        sp.parseStatement("(10)");
+        assertEquals(10.0, sp.getValue(), 0.0);
+    }
+
+    @Test
+    public void oneNegativeFactor() {
+        sp.parseStatement("-10");
+        assertEquals(-10.0, sp.getValue(), 0.0);
+    }
+
+    @Test
+    public void oneNegativeParenthesisedFactor() {
+        sp.parseStatement("-(10)");
+        assertEquals(-10.0, sp.getValue(), 0.0);
+    }
+
+    @Test
+    public void oneNegativeParenthesisedNegativeFactor() {
+        sp.parseStatement("-(-10)");
+        assertEquals(10.0, sp.getValue(), 0.0);
+    }
+
+    @Test
+    public void twoFactorSum() {
+        sp.parseStatement("2+3");
+        assertEquals(5.0, sp.getValue(), 0.0);
+    }
+
+    @Test
+    public void twoFactorSub() {
+        sp.parseStatement("2-3");
+        assertEquals(-1.0, sp.getValue(), 0.0);
+    }
+
+    @Test
+    public void twoFactorSumWithSub() {
+        sp.parseStatement("2--3");
+        assertEquals(5.0, sp.getValue(), 0.0);
+    }
+
+    @Test
+    public void twoFactorSumWithSubParenthesised() {
+        sp.parseStatement("2-(-3)");
+        assertEquals(5.0, sp.getValue(), 0.0);
+    }
+
+    @Test
+    public void twoFactorMul() {
+        sp.parseStatement("2*3");
+        assertEquals(6.0, sp.getValue(), 0.0);
+    }
+
+    @Test
+    public void twoFactorDiv() {
+        sp.parseStatement("11/4");
+        assertEquals(2.75, sp.getValue(), 0.0);
+    }
+
+    @Test
+    public void completeArithmeticOperationWithPriorities() {
+        sp.parseStatement("(4+5)*3/4");
+        assertEquals(6.75, sp.getValue(), 0.0);
+    }
+
+    //TODO - test error detection
+
+}