test number functions

git-svn-id: https://svn.code.sf.net/p/jackcess/code/jackcess/trunk@1183 f203690c-595d-4dc9-a70b-905162fa7fd2

src/main/java/com/healthmarketscience/jackcess/impl/expr/BuiltinOperators.java

@@ -56,6 +56,8 @@ public class BuiltinOperators
   public static final Value FALSE_VAL = new LongValue(0);
   public static final Value EMPTY_STR_VAL = new StringValue("");
   public static final Value ZERO_VAL = FALSE_VAL;
+  public static final Value NEG_ONE_VAL = TRUE_VAL;
+  public static final Value ONE_VAL = new LongValue(1);
 
 
   private enum CoercionType {

src/main/java/com/healthmarketscience/jackcess/impl/expr/DefaultNumberFunctions.java

@@ -147,14 +147,15 @@ public class DefaultNumberFunctions
   public static final Function SGN = registerFunc(new Func1NullIsNull("Sgn") {
     @Override
     protected Value eval1(EvalContext ctx, Value param1) {
-      int signum = 0;
+      int val = 0;
       if(param1.getType().isIntegral()) {
-        int lv = param1.getAsLongInt();
-        signum = ((lv > 0) ? 1 : ((lv < 0) ? -1 : 0));
+        val = param1.getAsLongInt();
       } else {
-        signum = param1.getAsBigDecimal().signum();
+        val = param1.getAsBigDecimal().signum();
       }
-      return BuiltinOperators.toValue(signum);
+      return ((val > 0) ? BuiltinOperators.ONE_VAL :
+              ((val < 0) ? BuiltinOperators.NEG_ONE_VAL :
+               BuiltinOperators.ZERO_VAL));
     }
   });
 

src/main/java/com/healthmarketscience/jackcess/impl/expr/DefaultTextFunctions.java

@@ -309,8 +309,9 @@ public class DefaultTextFunctions
       int cmp = (ignoreCase ?
                  s1.compareToIgnoreCase(s2) : s1.compareTo(s2));
       // stupid java doesn't return 1, -1, 0...
-      cmp = ((cmp < 0) ? -1 : ((cmp > 0) ? 1 : 0));
-      return BuiltinOperators.toValue(cmp);
+      return ((cmp < 0) ? BuiltinOperators.NEG_ONE_VAL :
+              ((cmp > 0) ? BuiltinOperators.ONE_VAL :
+               BuiltinOperators.ZERO_VAL));
     }
   });
 

src/test/java/com/healthmarketscience/jackcess/impl/expr/DefaultFunctionsTest.java

@@ -21,6 +21,7 @@ import java.math.BigDecimal;
 import com.healthmarketscience.jackcess.expr.EvalException;
 import junit.framework.TestCase;
 import static com.healthmarketscience.jackcess.impl.expr.ExpressionatorTest.eval;
+import static com.healthmarketscience.jackcess.impl.expr.ExpressionatorTest.toBD;
 
 /**
  *
@@ -171,6 +172,46 @@ public class DefaultFunctionsTest extends TestCase
     }
   }
 
+  public void testNumberFuncs() throws Exception
+  {
+    assertEquals(1, eval("=Abs(1)"));
+    assertEquals(1, eval("=Abs(-1)"));
+    assertEquals(toBD(1.1), eval("=Abs(-1.1)"));
+
+    assertEquals(Math.atan(0.2), eval("=Atan(0.2)"));
+    assertEquals(Math.sin(0.2), eval("=Sin(0.2)"));
+    assertEquals(Math.tan(0.2), eval("=Tan(0.2)"));
+    assertEquals(Math.cos(0.2), eval("=Cos(0.2)"));
+
+    assertEquals(Math.exp(0.2), eval("=Exp(0.2)"));
+    assertEquals(Math.log(0.2), eval("=Log(0.2)"));
+    assertEquals(Math.sqrt(4.3), eval("=Sqr(4.3)"));
+
+    assertEquals(3, eval("=Fix(3.5)"));
+    assertEquals(4, eval("=Fix(4)"));
+    assertEquals(-3, eval("=Fix(-3.5)"));
+    assertEquals(-4, eval("=Fix(-4)"));
+
+    assertEquals(1, eval("=Sgn(3.5)"));
+    assertEquals(1, eval("=Sgn(4)"));
+    assertEquals(-1, eval("=Sgn(-3.5)"));
+    assertEquals(-1, eval("=Sgn(-4)"));
+
+    assertEquals(3, eval("=Int(3.5)"));
+    assertEquals(4, eval("=Int(4)"));
+    assertEquals(-4, eval("=Int(-3.5)"));
+    assertEquals(-4, eval("=Int(-4)"));
+
+    assertEquals(toBD(4), eval("=Round(3.7)"));
+    assertEquals(4, eval("=Round(4)"));
+    assertEquals(toBD(-4), eval("=Round(-3.7)"));
+    assertEquals(-4, eval("=Round(-4)"));
+
+    assertEquals(toBD(3.73), eval("=Round(3.7345, 2)"));
+    assertEquals(4, eval("=Round(4, 2)"));
+    assertEquals(toBD(-3.73), eval("=Round(-3.7345, 2)"));
+    assertEquals(-4, eval("=Round(-4, 2)"));
+  }
 
   public void testFinancialFuncs() throws Exception
   {