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added some test cases

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This commit is contained in:
hneemann 2018-01-04 14:46:13 +01:00
parent e20b2e9823
commit a46c082954
1 changed files with 20 additions and 6 deletions
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26
src/test/java/de/neemann/digital/core/arithmetic/BitExtenderTest.java
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@ -21,10 +21,24 @@ public class BitExtenderTest extends TestCase {
check(in, out, 0, 0);
check(in, out, 1, 1);
check(in, out, 7, 7);
check(in, out, 8, -8);
check(in, out, 9, -7);
check(in, out, -1, -1);
check(in, out, -2, -2);
check(in, out, 8, -8 & 0xff);
check(in, out, 9, -7 & 0xff);
check(in, out, -1, -1 & 0xff);
check(in, out, -2, -2 & 0xff);
}
public void testSignExtend64() throws Exception {
ObservableValue in = new ObservableValue("in", 63);
BitExtender bitExtender = new BitExtender(new ElementAttributes()
.set(Keys.INPUT_BITS, 63)
.set(Keys.OUTPUT_BITS, 64));
bitExtender.setInputs(in.asList());
assertEquals(1, bitExtender.getOutputs().size());
ObservableValue out = bitExtender.getOutputs().get(0);
check(in, out, 0, 0);
check(in, out, 0x4000000000000000L, 0xC000000000000000L);
}
public void testSignExtendInit() throws Exception {
@ -39,9 +53,9 @@ public class BitExtenderTest extends TestCase {
}
private void check(ObservableValue in, ObservableValue out, int inVal, int outVal) {
private void check(ObservableValue in, ObservableValue out, long inVal, long outVal) {
in.setValue(inVal);
assertEquals(outVal, (byte) out.getValue());
assertEquals(outVal, out.getValue());
}
public void testSignExtendError() throws Exception {