Conversion tool

calculatorpp/src/test/java/org/solovyev/android/NumeralBaseUnitTypeTest.java

@@ -0,0 +1,69 @@
+package org.solovyev.android;
+
+import junit.framework.Assert;
+import org.jetbrains.annotations.NotNull;
+import org.junit.Test;
+
+import java.util.Date;
+import java.util.Random;
+
+/**
+ * User: serso
+ * Date: 4/21/12
+ * Time: 8:24 PM
+ */
+public class NumeralBaseUnitTypeTest {
+
+    @NotNull
+    private final UnitConverter c = NumeralBaseUnitType.getConverter();
+
+    @Test
+    public void testIsSupported() throws Exception {
+        Assert.assertTrue(c.isSupported(NumeralBaseUnitType.bin, NumeralBaseUnitType.dec));
+    }
+
+    @Test
+    public void testConvertFromDec() throws Exception {
+
+        Assert.assertEquals("101", c.convert(NumeralBaseUnitType.dec.createUnit("5"), NumeralBaseUnitType.bin).getValue());
+        Assert.assertEquals("1", c.convert(NumeralBaseUnitType.dec.createUnit("1"), NumeralBaseUnitType.bin).getValue());
+        Assert.assertEquals("0", c.convert(NumeralBaseUnitType.dec.createUnit("0"), NumeralBaseUnitType.bin).getValue());
+        Assert.assertEquals("1111100111", c.convert(NumeralBaseUnitType.dec.createUnit("999"), NumeralBaseUnitType.bin).getValue());
+
+        Assert.assertEquals("A23", c.convert(NumeralBaseUnitType.dec.createUnit("2595"), NumeralBaseUnitType.hex).getValue());
+        Assert.assertEquals("AEE", c.convert(NumeralBaseUnitType.dec.createUnit("2798"), NumeralBaseUnitType.hex).getValue());
+        Assert.assertEquals("15", c.convert(NumeralBaseUnitType.dec.createUnit("21"), NumeralBaseUnitType.hex).getValue());
+        Assert.assertEquals("0", c.convert(NumeralBaseUnitType.dec.createUnit("0"), NumeralBaseUnitType.hex).getValue());
+        Assert.assertEquals("3E7", c.convert(NumeralBaseUnitType.dec.createUnit("999"), NumeralBaseUnitType.hex).getValue());
+
+        Assert.assertEquals("76", c.convert(NumeralBaseUnitType.dec.createUnit("62"), NumeralBaseUnitType.oct).getValue());
+        Assert.assertEquals("12", c.convert(NumeralBaseUnitType.dec.createUnit("10"), NumeralBaseUnitType.oct).getValue());
+        Assert.assertEquals("15", c.convert(NumeralBaseUnitType.dec.createUnit("13"), NumeralBaseUnitType.oct).getValue());
+        Assert.assertEquals("0", c.convert(NumeralBaseUnitType.dec.createUnit("0"), NumeralBaseUnitType.oct).getValue());
+        Assert.assertEquals("10445", c.convert(NumeralBaseUnitType.dec.createUnit("4389"), NumeralBaseUnitType.oct).getValue());
+    }
+
+    @Test
+    public void testRandomConvert() throws Exception {
+        final Random random = new Random(new Date().getTime());
+        for (int i = 0; i < 100000; i++) {
+            final String value = String.valueOf(random.nextInt());
+            Assert.assertEquals(value, convertChain(value, NumeralBaseUnitType.dec, NumeralBaseUnitType.oct, NumeralBaseUnitType.oct, NumeralBaseUnitType.bin, NumeralBaseUnitType.dec));
+            Assert.assertEquals(value, convertChain(value, NumeralBaseUnitType.dec, NumeralBaseUnitType.bin, NumeralBaseUnitType.hex, NumeralBaseUnitType.dec, NumeralBaseUnitType.dec));
+            Assert.assertEquals(value, convertChain(value, NumeralBaseUnitType.dec, NumeralBaseUnitType.dec, NumeralBaseUnitType.hex, NumeralBaseUnitType.oct, NumeralBaseUnitType.dec));
+            Assert.assertEquals(value, convertChain(value, NumeralBaseUnitType.dec, NumeralBaseUnitType.hex, NumeralBaseUnitType.bin, NumeralBaseUnitType.oct, NumeralBaseUnitType.dec));
+
+        }
+    }
+
+    @NotNull
+    private String convertChain(@NotNull String value, @NotNull NumeralBaseUnitType baseUnitType, @NotNull NumeralBaseUnitType... types) {
+        Unit<String> unit = baseUnitType.createUnit(value);
+
+        for (NumeralBaseUnitType type : types) {
+            unit = NumeralBaseUnitType.getConverter().convert(unit, type);
+        }
+
+        return unit.getValue();
+    }
+}