Clean Code

Chapter 14: Successive Refinement
fail();
} catch (ArgsException e) {
assertEquals(ArgsException.ErrorCode.INVALID_INTEGER, e.getErrorCode());
assertEquals('x', e.getErrorArgumentId());
assertEquals("Forty two", e.getErrorParameter());
}
}
public void testMissingInteger() throws Exception {
try {
new Args("x#", new String[]{"-x"});
fail();
} catch (ArgsException e) {
assertEquals(ArgsException.ErrorCode.MISSING_INTEGER, e.getErrorCode());
assertEquals('x', e.getErrorArgumentId());
}
}
public void testSimpleDoublePresent() throws Exception {
Args args = new Args("x##", new String[]{"-x", "42.3"});
assertEquals(1, args.cardinality());
assertTrue(args.has('x'));
assertEquals(42.3, args.getDouble('x'), .001);
}
public void testInvalidDouble() throws Exception {
try {
new Args("x##", new String[]{"-x", "Forty two"});
fail();
} catch (ArgsException e) {
assertEquals(ArgsException.ErrorCode.INVALID_DOUBLE, e.getErrorCode());
assertEquals('x', e.getErrorArgumentId());
assertEquals("Forty two", e.getErrorParameter());
}
}
public void testMissingDouble() throws Exception {
try {
new Args("x##", new String[]{"-x"});
fail();
} catch (ArgsException e) {
assertEquals(ArgsException.ErrorCode.MISSING_DOUBLE, e.getErrorCode());
assertEquals('x', e.getErrorArgumentId());
}
}
}
Listing 14-14 
ArgsExceptionTest.java
public class ArgsExceptionTest extends TestCase {
public void testUnexpectedMessage() throws Exception {
ArgsException e = 
Listing 14-13 (continued)
ArgsTest.java

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245
String Arguments
new ArgsException(ArgsException.ErrorCode.UNEXPECTED_ARGUMENT, 
'x', null);
assertEquals("Argument -x unexpected.", e.errorMessage());
}
public void testMissingStringMessage() throws Exception {
ArgsException e = new ArgsException(ArgsException.ErrorCode.MISSING_STRING, 
'x', null);
assertEquals("Could not find string parameter for -x.", e.errorMessage());
}
public void testInvalidIntegerMessage() throws Exception {
ArgsException e = 
new ArgsException(ArgsException.ErrorCode.INVALID_INTEGER, 
'x', "Forty two");
assertEquals("Argument -x expects an integer but was 'Forty two'.", 
e.errorMessage());
}
public void testMissingIntegerMessage() throws Exception {
ArgsException e = 
new ArgsException(ArgsException.ErrorCode.MISSING_INTEGER, 'x', null);
assertEquals("Could not find integer parameter for -x.", e.errorMessage());
}
public void testInvalidDoubleMessage() throws Exception {
ArgsException e = new ArgsException(ArgsException.ErrorCode.INVALID_DOUBLE, 
'x', "Forty two");
assertEquals("Argument -x expects a double but was 'Forty two'.", 
e.errorMessage());
}
public void testMissingDoubleMessage() throws Exception {
ArgsException e = new ArgsException(ArgsException.ErrorCode.MISSING_DOUBLE, 
'x', null);
assertEquals("Could not find double parameter for -x.", e.errorMessage());
}
}