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Diffstat (limited to 'calculator-java/src/test/java/ExpressionParserTest.java')
-rw-r--r-- | calculator-java/src/test/java/ExpressionParserTest.java | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/calculator-java/src/test/java/ExpressionParserTest.java b/calculator-java/src/test/java/ExpressionParserTest.java new file mode 100644 index 0000000..8a9814c --- /dev/null +++ b/calculator-java/src/test/java/ExpressionParserTest.java @@ -0,0 +1,115 @@ +import ch.bfh.CalculatorLexer; +import ch.bfh.parser.ExpressionParser; +import org.junit.Test; +import static org.junit.Assert.assertEquals; + +public class ExpressionParserTest { + + // Only testing correct expressions first + @Test + public void emptyExpression() { + CalculatorLexer cl = new CalculatorLexer(); + cl.initLexer(""); + ExpressionParser ep = new ExpressionParser(cl); + assertEquals(0.0, ep.getValue(), 0.0); + } + + @Test + public void oneFactor() { + CalculatorLexer cl = new CalculatorLexer(); + cl.initLexer("10"); + ExpressionParser ep = new ExpressionParser(cl); + assertEquals(10.0, ep.getValue(), 0.0); + } + + @Test + public void oneParenthesisedFactor() { + CalculatorLexer cl = new CalculatorLexer(); + cl.initLexer("(10)"); + ExpressionParser ep = new ExpressionParser(cl); + assertEquals(10.0, ep.getValue(), 0.0); + } + + @Test + public void oneNegativeFactor() { + CalculatorLexer cl = new CalculatorLexer(); + cl.initLexer("-10"); + ExpressionParser ep = new ExpressionParser(cl); + assertEquals(-10.0, ep.getValue(), 0.0); + } + + @Test + public void oneNegativeParenthesisedFactor() { + CalculatorLexer cl = new CalculatorLexer(); + cl.initLexer("-(10)"); + ExpressionParser ep = new ExpressionParser(cl); + assertEquals(-10.0, ep.getValue(), 0.0); + } + + @Test + public void oneNegativeParenthesisedNegativeFactor() { + CalculatorLexer cl = new CalculatorLexer(); + cl.initLexer("-(-10)"); + ExpressionParser ep = new ExpressionParser(cl); + assertEquals(10.0, ep.getValue(), 0.0); + } + + @Test + public void twoFactorSum() { + CalculatorLexer cl = new CalculatorLexer(); + cl.initLexer("2+3"); + ExpressionParser ep = new ExpressionParser(cl); + assertEquals(5.0, ep.getValue(), 0.0); + } + + @Test + public void twoFactorSub() { + CalculatorLexer cl = new CalculatorLexer(); + cl.initLexer("2-3"); + ExpressionParser ep = new ExpressionParser(cl); + assertEquals(-1.0, ep.getValue(), 0.0); + } + + @Test + public void twoFactorSumWithSub() { + CalculatorLexer cl = new CalculatorLexer(); + cl.initLexer("2--3"); + ExpressionParser ep = new ExpressionParser(cl); + assertEquals(5.0, ep.getValue(), 0.0); + } + + @Test + public void twoFactorSumWithSubParenthesised() { + CalculatorLexer cl = new CalculatorLexer(); + cl.initLexer("2-(-3)"); + ExpressionParser ep = new ExpressionParser(cl); + assertEquals(5.0, ep.getValue(), 0.0); + } + + @Test + public void twoFactorMul() { + CalculatorLexer cl = new CalculatorLexer(); + cl.initLexer("2*3"); + ExpressionParser ep = new ExpressionParser(cl); + assertEquals(6.0, ep.getValue(), 0.0); + } + + @Test + public void twoFactorDiv() { + CalculatorLexer cl = new CalculatorLexer(); + cl.initLexer("11/4"); + ExpressionParser ep = new ExpressionParser(cl); + assertEquals(2.75, ep.getValue(), 0.0); + } + + @Test + public void completeArithmeticOperationWithPriorities() { + CalculatorLexer cl = new CalculatorLexer(); + cl.initLexer("(4+5)*3/4"); + ExpressionParser ep = new ExpressionParser(cl); + assertEquals(6.75, ep.getValue(), 0.0); + } + + //TODO - test error messages + +} |