Change the InvalidComponentPresetException so it reports all errors found in a preset instead of just the first. Changed all the test cases to ensure the proper errors are reported.

core/src/net/sf/openrocket/preset/ComponentPresetFactory.java

@@ -10,19 +10,22 @@ public abstract class ComponentPresetFactory {
 
 	public static ComponentPreset create( TypedPropertyMap props ) throws InvalidComponentPresetException {
 
+		InvalidComponentPresetException exceptions = new InvalidComponentPresetException("Invalid preset specification.");
+		
 		ComponentPreset preset = new ComponentPreset();
 		// First do validation.
-		if ( !props.containsKey(TYPE)) {
-			throw new InvalidComponentPresetException("No Type specified " + props.toString() );
-		}
-
 		if (!props.containsKey(MANUFACTURER)) {
-			throw new InvalidComponentPresetException("No Manufacturer specified " + props.toString() );
+			exceptions.addInvalidParameter(MANUFACTURER, "No Manufacturer specified"); 
+		}
+		if (!props.containsKey(PARTNO)) {
+			exceptions.addInvalidParameter(PARTNO,"No PartNo specified");
+		}
+		if ( !props.containsKey(TYPE)) {
+			exceptions.addInvalidParameter(TYPE, "No Type specified" );
+			// We can't do anything else without TYPE so throw immediately.
+			throw exceptions;
 		}
 
-		if (!props.containsKey(PARTNO)) {
-			throw new InvalidComponentPresetException("No PartNo specified " + props.toString() );
-		}
 
 		preset.putAll(props);
 
@@ -30,60 +33,64 @@ public abstract class ComponentPresetFactory {
 		Type t = props.get(TYPE);
 		switch ( t ) {
 		case BODY_TUBE: {
-			makeBodyTube(preset);
+			makeBodyTube(exceptions,preset);
 			break;
 		}
 		case NOSE_CONE: {
-			makeNoseCone(preset);
+			makeNoseCone(exceptions,preset);
 			break;
 		}
 		case TRANSITION: {
-			makeTransition(preset);
+			makeTransition(exceptions,preset);
 			break;
 		}
 		case BULK_HEAD: {
-			makeBulkHead(preset);
+			makeBulkHead(exceptions,preset);
 			break;
 		}
 		case TUBE_COUPLER: {
 			// For now TUBE_COUPLER is the same as BODY_TUBE
-			makeBodyTube(preset);
+			makeBodyTube(exceptions,preset);
 			break;
 		}
 		case CENTERING_RING: {
-			makeCenteringRing(preset);
+			makeCenteringRing(exceptions,preset);
 			break;
 		}
 		case ENGINE_BLOCK: {
-			makeEngineBlock(preset);
+			makeEngineBlock(exceptions,preset);
 			break;
 		}
 		case LAUNCH_LUG: {
 			// Same processing as BODY_TUBE
-			makeBodyTube(preset);
+			makeBodyTube(exceptions,preset);
 			break;
 		}
 		case STREAMER: {
-			makeStreamer(preset);
+			makeStreamer(exceptions,preset);
 			break;
 		}
 		case PARACHUTE: {
-			makeParachute(preset);
+			makeParachute(exceptions,preset);
 			break;
 		}
 		}
 
+		if ( exceptions.hasProblems() ) {
+			throw exceptions;
+		}
+		
 		preset.computeDigest();
 
 		return preset;
 
 	}
 
-	private static void makeBodyTube( ComponentPreset preset ) throws InvalidComponentPresetException {
+	private static void makeBodyTube( InvalidComponentPresetException exceptions, ComponentPreset preset ) throws InvalidComponentPresetException {
 		
-		checkRequiredFields( preset, LENGTH );
+		checkRequiredFields( exceptions, preset, LENGTH );
 
-		checkDiametersAndThickness(preset);
+		checkDiametersAndThickness(exceptions, preset);
 		
 		double volume = computeVolumeOfTube( preset );
 		
@@ -100,9 +107,9 @@ public abstract class ComponentPresetFactory {
 
 	}
 
-	private static void makeNoseCone( ComponentPreset preset ) throws InvalidComponentPresetException {
+	private static void makeNoseCone( InvalidComponentPresetException exceptions, ComponentPreset preset ) {
 
-		checkRequiredFields( preset, LENGTH, SHAPE, AFT_OUTER_DIAMETER );
+		checkRequiredFields( exceptions, preset, LENGTH, SHAPE, AFT_OUTER_DIAMETER );
 
 		if ( preset.has(MASS) ) {
 			// compute a density for this component
@@ -123,8 +130,8 @@ public abstract class ComponentPresetFactory {
 
 	}
 
-	private static void makeTransition( ComponentPreset preset ) throws InvalidComponentPresetException {
-		checkRequiredFields(preset, LENGTH, AFT_OUTER_DIAMETER, FORE_OUTER_DIAMETER);
+	private static void makeTransition( InvalidComponentPresetException exceptions, ComponentPreset preset ) {
+		checkRequiredFields(exceptions, preset, LENGTH, AFT_OUTER_DIAMETER, FORE_OUTER_DIAMETER);
 
 		if ( preset.has(MASS) ) {
 			// compute a density for this component
@@ -145,8 +152,8 @@ public abstract class ComponentPresetFactory {
 
 	}
 
-	private static void makeBulkHead( ComponentPreset preset ) throws InvalidComponentPresetException {
-		checkRequiredFields(preset, LENGTH, OUTER_DIAMETER );
+	private static void makeBulkHead( InvalidComponentPresetException exceptions, ComponentPreset preset ) {
+		checkRequiredFields(exceptions, preset, LENGTH, OUTER_DIAMETER );
 
 		if ( preset.has(MASS) ) {
 			// compute a density for this component
@@ -167,10 +174,10 @@ public abstract class ComponentPresetFactory {
 
 	}
 
-	private static void makeCenteringRing( ComponentPreset preset ) throws InvalidComponentPresetException {
-		checkRequiredFields( preset, LENGTH );
+	private static void makeCenteringRing( InvalidComponentPresetException exceptions, ComponentPreset preset ) throws InvalidComponentPresetException {
+		checkRequiredFields( exceptions, preset, LENGTH );
 
-		checkDiametersAndThickness( preset );
+		checkDiametersAndThickness( exceptions, preset );
 
 		double volume = computeVolumeOfTube( preset );
 
@@ -186,10 +193,10 @@ public abstract class ComponentPresetFactory {
 
 	}
 	
-	private static void makeEngineBlock( ComponentPreset preset ) throws InvalidComponentPresetException {
-		checkRequiredFields( preset, LENGTH );
+	private static void makeEngineBlock( InvalidComponentPresetException exceptions, ComponentPreset preset ) throws InvalidComponentPresetException {
+		checkRequiredFields( exceptions, preset, LENGTH );
 
-		checkDiametersAndThickness( preset );
+		checkDiametersAndThickness( exceptions, preset );
 
 		double volume = computeVolumeOfTube( preset );
 
@@ -205,24 +212,24 @@ public abstract class ComponentPresetFactory {
 
 	}
 	
-	private static void makeStreamer( ComponentPreset preset ) throws InvalidComponentPresetException {
-		checkRequiredFields( preset, LENGTH, WIDTH );
+	private static void makeStreamer( InvalidComponentPresetException exceptions, ComponentPreset preset ) {
+		checkRequiredFields( exceptions, preset, LENGTH, WIDTH );
 	}
 
-	private static void makeParachute( ComponentPreset preset ) throws InvalidComponentPresetException {
-		checkRequiredFields( preset, DIAMETER, LINE_COUNT, LINE_LENGTH );
+	private static void makeParachute( InvalidComponentPresetException exceptions, ComponentPreset preset ) {
+		checkRequiredFields( exceptions, preset, DIAMETER, LINE_COUNT, LINE_LENGTH );
 	}
 	
 
-	private static void checkRequiredFields( ComponentPreset preset, TypedKey<?> ... keys ) throws InvalidComponentPresetException {
+	private static void checkRequiredFields( InvalidComponentPresetException exceptions, ComponentPreset preset, TypedKey<?> ... keys ) {
 		for( TypedKey<?> key: keys ) {
 			if (! preset.has(key) ) {
-				throw new InvalidComponentPresetException( "No " + key.getName() + " specified for " + preset.getType().name() + " preset " + preset.toString());
+				exceptions.addInvalidParameter(key, "No " + key.getName() + " specified");
 			}
 		}
 	}
 
-	private static void checkDiametersAndThickness( ComponentPreset preset ) throws InvalidComponentPresetException {
+	private static void checkDiametersAndThickness( InvalidComponentPresetException exceptions, ComponentPreset preset ) throws InvalidComponentPresetException {
 		// Need to verify contains 2 of OD, thickness, ID.  Compute the third.
 		boolean hasOd = preset.has(OUTER_DIAMETER);
 		boolean hasId = preset.has(INNER_DIAMETER);
@@ -242,11 +249,13 @@ public abstract class ComponentPresetFactory {
 				thickness = preset.get(THICKNESS);
 				innerRadius = outerRadius - thickness;
 			} else {
-				throw new InvalidComponentPresetException("Preset underspecified " + preset.toString());
+				exceptions.addMessage("Preset dimensions underspecified");
+				throw exceptions;
 			}
 		} else {
 			if ( ! hasId || ! hasThickness ) {
-				throw new InvalidComponentPresetException("Preset underspecified " + preset.toString());
+				exceptions.addMessage("Preset dimensions underspecified");
+				throw exceptions;
 			}
 			innerRadius = preset.get(INNER_DIAMETER)/2.0;
 			thickness = preset.get(THICKNESS);

core/src/net/sf/openrocket/preset/InvalidComponentPresetException.java

@@ -1,25 +1,56 @@
 package net.sf.openrocket.preset;
 
+import java.util.ArrayList;
+import java.util.List;
+
 public class InvalidComponentPresetException extends Exception {
 
+	private List<String> errors = new ArrayList<String>();
+	private List<TypedKey<?>> invalidParameters = new ArrayList<TypedKey<?>>();
+	
 	public InvalidComponentPresetException() {
 		super();
-		// TODO Auto-generated constructor stub
 	}
 
 	public InvalidComponentPresetException(String message, Throwable cause) {
 		super(message, cause);
-		// TODO Auto-generated constructor stub
 	}
 
 	public InvalidComponentPresetException(String message) {
 		super(message);
-		// TODO Auto-generated constructor stub
 	}
 
 	public InvalidComponentPresetException(Throwable cause) {
 		super(cause);
-		// TODO Auto-generated constructor stub
+	}
+	
+	void addInvalidParameter(TypedKey<?> key ) {
+		invalidParameters.add(key);
+	}
+	
+	void addInvalidParameter(TypedKey<?> key, String message ) {
+		invalidParameters.add(key);
+		errors.add(message);
+	}
+	
+	void addMessage( String message ) {
+		errors.add(message);
+	}
+
+	boolean hasProblems() {
+		return (invalidParameters.size() + errors.size()) > 0;
+	}
+	
+	public int problemCount() {
+		return Math.max( invalidParameters.size(), errors.size() );
+	}
+	
+	public List<String> getErrors() {
+		return errors;
+	}
+
+	public List<TypedKey<?>> getInvalidParameters() {
+		return invalidParameters;
 	}
 	
 }

core/test/net/sf/openrocket/preset/BodyTubePresetTests.java

@@ -1,7 +1,6 @@
 package net.sf.openrocket.preset;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
 import net.sf.openrocket.material.Material;
 import net.sf.openrocket.motor.Manufacturer;
 
@@ -25,7 +24,19 @@ public class BodyTubePresetTests {
 			presetspec.put(ComponentPreset.TYPE, ComponentPreset.Type.BODY_TUBE);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No Manufacturer specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.MANUFACTURER, 
+					ComponentPreset.PARTNO, 
+					ComponentPreset.LENGTH
+			},
+			new String[] {
+					"No Manufacturer specified",
+					"No PartNo specified",
+					"No Length specified",
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 
@@ -37,7 +48,17 @@ public class BodyTubePresetTests {
 			presetspec.put( ComponentPreset.MANUFACTURER, Manufacturer.getManufacturer("manufacturer"));
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No PartNo specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.PARTNO, 
+					ComponentPreset.LENGTH
+			},
+			new String[] {
+					"No PartNo specified",
+					"No Length specified",
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 
@@ -50,7 +71,15 @@ public class BodyTubePresetTests {
 			presetspec.put( ComponentPreset.PARTNO, "partno");
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No Length specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.LENGTH
+			},
+			new String[] {
+					"No Length specified",
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 
@@ -65,7 +94,12 @@ public class BodyTubePresetTests {
 			presetspec.put( ComponentPreset.OUTER_DIAMETER, 2.0);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("Preset underspecified"));
+			PresetTest.assertInvalidPresetException( ex,
+					null,
+			new String[] {
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 
@@ -80,7 +114,12 @@ public class BodyTubePresetTests {
 			presetspec.put( ComponentPreset.INNER_DIAMETER, 2.0);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("Preset underspecified"));
+			PresetTest.assertInvalidPresetException( ex,
+					null,
+			new String[] {
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 
@@ -95,7 +134,12 @@ public class BodyTubePresetTests {
 			presetspec.put( ComponentPreset.THICKNESS, 2.0);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("Preset underspecified"));
+			PresetTest.assertInvalidPresetException( ex,
+					null,
+			new String[] {
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 

core/test/net/sf/openrocket/preset/BulkHeadPresetTests.java

@@ -1,7 +1,6 @@
 package net.sf.openrocket.preset;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
 import net.sf.openrocket.material.Material;
 import net.sf.openrocket.motor.Manufacturer;
 
@@ -25,7 +24,20 @@ public class BulkHeadPresetTests {
 			presetspec.put(ComponentPreset.TYPE, ComponentPreset.Type.BULK_HEAD);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No Manufacturer specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.MANUFACTURER, 
+					ComponentPreset.PARTNO, 
+					ComponentPreset.LENGTH,
+					ComponentPreset.OUTER_DIAMETER
+			},
+			new String[] {
+					"No Manufacturer specified",
+					"No PartNo specified",
+					"No Length specified",
+					"No OuterDiameter specified"
+			}
+					);
 		}
 	}
 
@@ -37,7 +49,18 @@ public class BulkHeadPresetTests {
 			presetspec.put( ComponentPreset.MANUFACTURER, Manufacturer.getManufacturer("manufacturer"));
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No PartNo specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.PARTNO, 
+					ComponentPreset.LENGTH,
+					ComponentPreset.OUTER_DIAMETER
+			},
+			new String[] {
+					"No PartNo specified",
+					"No Length specified",
+					"No OuterDiameter specified"
+			}
+					);
 		}
 	}
 
@@ -50,7 +73,16 @@ public class BulkHeadPresetTests {
 			presetspec.put( ComponentPreset.PARTNO, "partno");
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No Length specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.LENGTH,
+					ComponentPreset.OUTER_DIAMETER
+			},
+			new String[] {
+					"No Length specified",
+					"No OuterDiameter specified"
+			}
+					);
 		}
 	}
 
@@ -64,7 +96,14 @@ public class BulkHeadPresetTests {
 			presetspec.put( ComponentPreset.LENGTH, 2.0);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No OuterDiameter specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.OUTER_DIAMETER
+			},
+			new String[] {
+					"No OuterDiameter specified"
+			}
+					);
 		}
 	}
 

core/test/net/sf/openrocket/preset/CenteringRingPresetTests.java

@@ -1,7 +1,6 @@
 package net.sf.openrocket.preset;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
 import net.sf.openrocket.material.Material;
 import net.sf.openrocket.motor.Manufacturer;
 
@@ -25,7 +24,19 @@ public class CenteringRingPresetTests {
 			presetspec.put(ComponentPreset.TYPE, ComponentPreset.Type.CENTERING_RING);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No Manufacturer specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.MANUFACTURER, 
+					ComponentPreset.PARTNO, 
+					ComponentPreset.LENGTH
+			},
+			new String[] {
+					"No Manufacturer specified",
+					"No PartNo specified",
+					"No Length specified",
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 
@@ -37,7 +48,17 @@ public class CenteringRingPresetTests {
 			presetspec.put( ComponentPreset.MANUFACTURER, Manufacturer.getManufacturer("manufacturer"));
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No PartNo specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.PARTNO, 
+					ComponentPreset.LENGTH
+			},
+			new String[] {
+					"No PartNo specified",
+					"No Length specified",
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 
@@ -50,7 +71,15 @@ public class CenteringRingPresetTests {
 			presetspec.put( ComponentPreset.PARTNO, "partno");
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No Length specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.LENGTH
+			},
+			new String[] {
+					"No Length specified",
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 
@@ -65,7 +94,12 @@ public class CenteringRingPresetTests {
 			presetspec.put( ComponentPreset.OUTER_DIAMETER, 2.0);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("Preset underspecified"));
+			PresetTest.assertInvalidPresetException( ex,
+					null,
+			new String[] {
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 
@@ -80,7 +114,12 @@ public class CenteringRingPresetTests {
 			presetspec.put( ComponentPreset.INNER_DIAMETER, 2.0);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("Preset underspecified"));
+			PresetTest.assertInvalidPresetException( ex,
+					null,
+			new String[] {
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 
@@ -95,7 +134,12 @@ public class CenteringRingPresetTests {
 			presetspec.put( ComponentPreset.THICKNESS, 2.0);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("Preset underspecified"));
+			PresetTest.assertInvalidPresetException( ex,
+					null,
+			new String[] {
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 

core/test/net/sf/openrocket/preset/EngineBlockPresetTests.java

@@ -1,7 +1,6 @@
 package net.sf.openrocket.preset;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
 import net.sf.openrocket.material.Material;
 import net.sf.openrocket.motor.Manufacturer;
 
@@ -25,7 +24,19 @@ public class EngineBlockPresetTests {
 			presetspec.put(ComponentPreset.TYPE, ComponentPreset.Type.ENGINE_BLOCK);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No Manufacturer specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.MANUFACTURER, 
+					ComponentPreset.PARTNO, 
+					ComponentPreset.LENGTH
+			},
+			new String[] {
+					"No Manufacturer specified",
+					"No PartNo specified",
+					"No Length specified",
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 
@@ -37,7 +48,17 @@ public class EngineBlockPresetTests {
 			presetspec.put( ComponentPreset.MANUFACTURER, Manufacturer.getManufacturer("manufacturer"));
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No PartNo specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.PARTNO, 
+					ComponentPreset.LENGTH
+			},
+			new String[] {
+					"No PartNo specified",
+					"No Length specified",
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 
@@ -50,7 +71,15 @@ public class EngineBlockPresetTests {
 			presetspec.put( ComponentPreset.PARTNO, "partno");
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No Length specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.LENGTH
+			},
+			new String[] {
+					"No Length specified",
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 
@@ -65,7 +94,12 @@ public class EngineBlockPresetTests {
 			presetspec.put( ComponentPreset.OUTER_DIAMETER, 2.0);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("Preset underspecified"));
+			PresetTest.assertInvalidPresetException( ex,
+					null,
+			new String[] {
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 
@@ -80,7 +114,12 @@ public class EngineBlockPresetTests {
 			presetspec.put( ComponentPreset.INNER_DIAMETER, 2.0);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("Preset underspecified"));
+			PresetTest.assertInvalidPresetException( ex,
+					null,
+			new String[] {
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 
@@ -95,7 +134,12 @@ public class EngineBlockPresetTests {
 			presetspec.put( ComponentPreset.THICKNESS, 2.0);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("Preset underspecified"));
+			PresetTest.assertInvalidPresetException( ex,
+					null,
+			new String[] {
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 

core/test/net/sf/openrocket/preset/LaunchLugPresetTests.java

@@ -1,7 +1,6 @@
 package net.sf.openrocket.preset;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
 import net.sf.openrocket.material.Material;
 import net.sf.openrocket.motor.Manufacturer;
 
@@ -25,7 +24,19 @@ public class LaunchLugPresetTests {
 			presetspec.put(ComponentPreset.TYPE, ComponentPreset.Type.LAUNCH_LUG);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No Manufacturer specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.MANUFACTURER, 
+					ComponentPreset.PARTNO, 
+					ComponentPreset.LENGTH
+			},
+			new String[] {
+					"No Manufacturer specified",
+					"No PartNo specified",
+					"No Length specified",
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 
@@ -37,7 +48,17 @@ public class LaunchLugPresetTests {
 			presetspec.put( ComponentPreset.MANUFACTURER, Manufacturer.getManufacturer("manufacturer"));
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No PartNo specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.PARTNO, 
+					ComponentPreset.LENGTH
+			},
+			new String[] {
+					"No PartNo specified",
+					"No Length specified",
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 
@@ -50,7 +71,15 @@ public class LaunchLugPresetTests {
 			presetspec.put( ComponentPreset.PARTNO, "partno");
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No Length specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.LENGTH
+			},
+			new String[] {
+					"No Length specified",
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 
@@ -65,7 +94,12 @@ public class LaunchLugPresetTests {
 			presetspec.put( ComponentPreset.OUTER_DIAMETER, 2.0);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("Preset underspecified"));
+			PresetTest.assertInvalidPresetException( ex,
+					null,
+			new String[] {
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 
@@ -80,7 +114,12 @@ public class LaunchLugPresetTests {
 			presetspec.put( ComponentPreset.INNER_DIAMETER, 2.0);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("Preset underspecified"));
+			PresetTest.assertInvalidPresetException( ex,
+					null,
+			new String[] {
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 
@@ -95,7 +134,12 @@ public class LaunchLugPresetTests {
 			presetspec.put( ComponentPreset.THICKNESS, 2.0);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("Preset underspecified"));
+			PresetTest.assertInvalidPresetException( ex,
+					null,
+			new String[] {
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 

core/test/net/sf/openrocket/preset/NoseConePresetTests.java

@@ -1,7 +1,6 @@
 package net.sf.openrocket.preset;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
 import net.sf.openrocket.material.Material;
 import net.sf.openrocket.motor.Manufacturer;
 import net.sf.openrocket.rocketcomponent.Transition;
@@ -27,7 +26,22 @@ public class NoseConePresetTests extends BaseTestCase {
 			presetspec.put(ComponentPreset.TYPE, ComponentPreset.Type.NOSE_CONE);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No Manufacturer specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.MANUFACTURER, 
+					ComponentPreset.PARTNO, 
+					ComponentPreset.LENGTH,
+					ComponentPreset.AFT_OUTER_DIAMETER,
+					ComponentPreset.SHAPE
+			},
+			new String[] {
+					"No Manufacturer specified",
+					"No PartNo specified",
+					"No Length specified",
+					"No AftOuterDiameter specified",
+					"No Shape specified"
+			}
+					);
 		}
 	}
 
@@ -39,7 +53,20 @@ public class NoseConePresetTests extends BaseTestCase {
 			presetspec.put( ComponentPreset.MANUFACTURER, Manufacturer.getManufacturer("manufacturer"));
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No PartNo specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.PARTNO, 
+					ComponentPreset.LENGTH,
+					ComponentPreset.AFT_OUTER_DIAMETER,
+					ComponentPreset.SHAPE
+			},
+			new String[] {
+					"No PartNo specified",
+					"No Length specified",
+					"No AftOuterDiameter specified",
+					"No Shape specified"
+			}
+					);
 		}
 	}
 
@@ -52,7 +79,18 @@ public class NoseConePresetTests extends BaseTestCase {
 			presetspec.put( ComponentPreset.PARTNO, "partno");
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No Length specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.LENGTH,
+					ComponentPreset.AFT_OUTER_DIAMETER,
+					ComponentPreset.SHAPE
+			},
+			new String[] {
+					"No Length specified",
+					"No AftOuterDiameter specified",
+					"No Shape specified"
+			}
+					);
 		}
 	}
 
@@ -66,7 +104,16 @@ public class NoseConePresetTests extends BaseTestCase {
 			presetspec.put( ComponentPreset.LENGTH, 2.0);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No Shape"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.AFT_OUTER_DIAMETER,
+					ComponentPreset.SHAPE
+			},
+			new String[] {
+					"No AftOuterDiameter specified",
+					"No Shape specified"
+			}
+					);
 		}
 	}
 
@@ -81,7 +128,14 @@ public class NoseConePresetTests extends BaseTestCase {
 			presetspec.put( ComponentPreset.SHAPE, Transition.Shape.CONICAL);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No AftOuterDiameter"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.AFT_OUTER_DIAMETER
+			},
+			new String[] {
+					"No AftOuterDiameter specified"
+			}
+					);
 		}
 	}
 

core/test/net/sf/openrocket/preset/ParachutePresetTests.java

@@ -1,6 +1,5 @@
 package net.sf.openrocket.preset;
 
-import static org.junit.Assert.assertTrue;
 import net.sf.openrocket.motor.Manufacturer;
 
 import org.junit.Test;
@@ -23,7 +22,22 @@ public class ParachutePresetTests {
 			presetspec.put(ComponentPreset.TYPE, ComponentPreset.Type.PARACHUTE);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No Manufacturer specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.MANUFACTURER, 
+					ComponentPreset.PARTNO, 
+					ComponentPreset.DIAMETER,
+					ComponentPreset.LINE_COUNT,
+					ComponentPreset.LINE_LENGTH
+			},
+			new String[] {
+					"No Manufacturer specified",
+					"No PartNo specified",
+					"No Diameter specified",
+					"No LineCount specified",
+					"No LineLength specified"
+			}
+					);
 		}
 	}
 
@@ -35,7 +49,20 @@ public class ParachutePresetTests {
 			presetspec.put( ComponentPreset.MANUFACTURER, Manufacturer.getManufacturer("manufacturer"));
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No PartNo specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.PARTNO, 
+					ComponentPreset.DIAMETER,
+					ComponentPreset.LINE_COUNT,
+					ComponentPreset.LINE_LENGTH
+			},
+			new String[] {
+					"No PartNo specified",
+					"No Diameter specified",
+					"No LineCount specified",
+					"No LineLength specified"
+			}
+					);
 		}
 	}
 
@@ -48,7 +75,18 @@ public class ParachutePresetTests {
 			presetspec.put( ComponentPreset.PARTNO, "partno");
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No Diameter specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.DIAMETER,
+					ComponentPreset.LINE_COUNT,
+					ComponentPreset.LINE_LENGTH
+			},
+			new String[] {
+					"No Diameter specified",
+					"No LineCount specified",
+					"No LineLength specified"
+			}
+					);
 		}
 	}
 
@@ -62,7 +100,16 @@ public class ParachutePresetTests {
 			presetspec.put( ComponentPreset.DIAMETER, 2.0);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No LineCount specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.LINE_COUNT,
+					ComponentPreset.LINE_LENGTH
+			},
+			new String[] {
+					"No LineCount specified",
+					"No LineLength specified"
+			}
+					);
 		}
 	}
 
@@ -77,7 +124,14 @@ public class ParachutePresetTests {
 			presetspec.put( ComponentPreset.LINE_COUNT, 6);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No LineLength specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.LINE_LENGTH
+			},
+			new String[] {
+					"No LineLength specified"
+			}
+					);
 		}
 	}
 

core/test/net/sf/openrocket/preset/PresetTest.java

@@ -0,0 +1,43 @@
+package net.sf.openrocket.preset;
+
+import static org.junit.Assert.*;
+
+public abstract class PresetTest {
+
+	public static void assertInvalidPresetException( InvalidComponentPresetException exceptions, TypedKey<?>[] keys, String[] messages ) {
+		if ( keys != null ) {
+			assertEquals( keys.length, exceptions.getInvalidParameters().size() );
+			for( TypedKey<?> expectedKey : keys ) {
+				boolean keyFound = false;
+				for( TypedKey<?> k : exceptions.getInvalidParameters() ) {
+					if ( expectedKey == k ) {
+						keyFound = true;
+						break;
+					}
+				}
+				if ( ! keyFound ) {
+					fail( "Expected key " + expectedKey + " not in exception");
+				}
+			}
+		} else {
+			assertEquals(0, exceptions.getInvalidParameters().size() );
+		}
+		if ( messages != null ) {
+			assertEquals( messages.length, exceptions.getErrors().size() );
+			for( String expectedMessage : messages ) {
+				boolean stringMatched = false;
+				for ( String s : exceptions.getErrors() ) {
+					if ( s.contains( expectedMessage ) ) {
+						stringMatched = true;
+						break;
+					}
+				}
+				if( !stringMatched ) {
+					fail( "Expected string \"" + expectedMessage + "\" not reported in errors");
+				}
+			}
+		} else {
+			assertEquals(0, exceptions.getErrors().size() );
+		}
+	}
+}

core/test/net/sf/openrocket/preset/StreamerPresetTests.java

@@ -1,6 +1,5 @@
 package net.sf.openrocket.preset;
 
-import static org.junit.Assert.assertTrue;
 import net.sf.openrocket.motor.Manufacturer;
 
 import org.junit.Test;
@@ -23,7 +22,20 @@ public class StreamerPresetTests {
 			presetspec.put(ComponentPreset.TYPE, ComponentPreset.Type.STREAMER);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No Manufacturer specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.MANUFACTURER, 
+					ComponentPreset.PARTNO, 
+					ComponentPreset.LENGTH,
+					ComponentPreset.WIDTH
+			},
+			new String[] {
+					"No Manufacturer specified",
+					"No PartNo specified",
+					"No Length specified",
+					"No Width specified"
+			}
+					);
 		}
 	}
 
@@ -35,7 +47,18 @@ public class StreamerPresetTests {
 			presetspec.put( ComponentPreset.MANUFACTURER, Manufacturer.getManufacturer("manufacturer"));
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No PartNo specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.PARTNO, 
+					ComponentPreset.LENGTH,
+					ComponentPreset.WIDTH
+			},
+			new String[] {
+					"No PartNo specified",
+					"No Length specified",
+					"No Width specified"
+			}
+					);
 		}
 	}
 
@@ -48,7 +71,16 @@ public class StreamerPresetTests {
 			presetspec.put( ComponentPreset.PARTNO, "partno");
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No Length specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.LENGTH,
+					ComponentPreset.WIDTH
+			},
+			new String[] {
+					"No Length specified",
+					"No Width specified"
+			}
+					);
 		}
 	}
 
@@ -62,7 +94,14 @@ public class StreamerPresetTests {
 			presetspec.put( ComponentPreset.LENGTH, 2.0);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No Width specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.WIDTH
+			},
+			new String[] {
+					"No Width specified"
+			}
+					);
 		}
 	}
 

core/test/net/sf/openrocket/preset/TransitionPresetTests.java

@@ -1,7 +1,6 @@
 package net.sf.openrocket.preset;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
 import net.sf.openrocket.material.Material;
 import net.sf.openrocket.motor.Manufacturer;
 import net.sf.openrocket.rocketcomponent.Transition;
@@ -27,7 +26,22 @@ public class TransitionPresetTests extends BaseTestCase {
 			presetspec.put(ComponentPreset.TYPE, ComponentPreset.Type.TRANSITION);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No Manufacturer specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.MANUFACTURER, 
+					ComponentPreset.PARTNO, 
+					ComponentPreset.LENGTH,
+					ComponentPreset.AFT_OUTER_DIAMETER,
+					ComponentPreset.FORE_OUTER_DIAMETER
+			},
+			new String[] {
+					"No Manufacturer specified",
+					"No PartNo specified",
+					"No Length specified",
+					"No AftOuterDiameter specified",
+					"No ForeOuterDiameter specified"
+			}
+					);
 		}
 	}
 
@@ -39,7 +53,20 @@ public class TransitionPresetTests extends BaseTestCase {
 			presetspec.put( ComponentPreset.MANUFACTURER, Manufacturer.getManufacturer("manufacturer"));
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No PartNo specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.PARTNO, 
+					ComponentPreset.LENGTH,
+					ComponentPreset.AFT_OUTER_DIAMETER,
+					ComponentPreset.FORE_OUTER_DIAMETER
+			},
+			new String[] {
+					"No PartNo specified",
+					"No Length specified",
+					"No AftOuterDiameter specified",
+					"No ForeOuterDiameter specified"
+			}
+					);
 		}
 	}
 
@@ -52,7 +79,18 @@ public class TransitionPresetTests extends BaseTestCase {
 			presetspec.put( ComponentPreset.PARTNO, "partno");
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No Length specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.LENGTH,
+					ComponentPreset.AFT_OUTER_DIAMETER,
+					ComponentPreset.FORE_OUTER_DIAMETER
+			},
+			new String[] {
+					"No Length specified",
+					"No AftOuterDiameter specified",
+					"No ForeOuterDiameter specified"
+			}
+					);
 		}
 	}
 
@@ -67,7 +105,16 @@ public class TransitionPresetTests extends BaseTestCase {
 			presetspec.put( ComponentPreset.SHAPE, Transition.Shape.CONICAL);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No AftOuterDiameter"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.AFT_OUTER_DIAMETER,
+					ComponentPreset.FORE_OUTER_DIAMETER
+			},
+			new String[] {
+					"No AftOuterDiameter specified",
+					"No ForeOuterDiameter specified"
+			}
+					);
 		}
 	}
 
@@ -84,7 +131,14 @@ public class TransitionPresetTests extends BaseTestCase {
 			presetspec.put( ComponentPreset.AFT_OUTER_DIAMETER, 2.0);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No ForeOuterDiameter"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.FORE_OUTER_DIAMETER
+			},
+			new String[] {
+					"No ForeOuterDiameter specified"
+			}
+					);
 		}
 	}
 

core/test/net/sf/openrocket/preset/TubeCouplerPresetTests.java

@@ -1,7 +1,6 @@
 package net.sf.openrocket.preset;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
 import net.sf.openrocket.material.Material;
 import net.sf.openrocket.motor.Manufacturer;
 
@@ -25,7 +24,19 @@ public class TubeCouplerPresetTests {
 			presetspec.put(ComponentPreset.TYPE, ComponentPreset.Type.TUBE_COUPLER);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No Manufacturer specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.MANUFACTURER, 
+					ComponentPreset.PARTNO, 
+					ComponentPreset.LENGTH
+			},
+			new String[] {
+					"No Manufacturer specified",
+					"No PartNo specified",
+					"No Length specified",
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 
@@ -37,7 +48,17 @@ public class TubeCouplerPresetTests {
 			presetspec.put( ComponentPreset.MANUFACTURER, Manufacturer.getManufacturer("manufacturer"));
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No PartNo specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.PARTNO, 
+					ComponentPreset.LENGTH
+			},
+			new String[] {
+					"No PartNo specified",
+					"No Length specified",
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 
@@ -50,7 +71,15 @@ public class TubeCouplerPresetTests {
 			presetspec.put( ComponentPreset.PARTNO, "partno");
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("No Length specified"));
+			PresetTest.assertInvalidPresetException( ex,
+					new TypedKey<?>[] {
+					ComponentPreset.LENGTH
+			},
+			new String[] {
+					"No Length specified",
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 
@@ -65,7 +94,12 @@ public class TubeCouplerPresetTests {
 			presetspec.put( ComponentPreset.OUTER_DIAMETER, 2.0);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("Preset underspecified"));
+			PresetTest.assertInvalidPresetException( ex,
+					null,
+			new String[] {
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 
@@ -80,7 +114,12 @@ public class TubeCouplerPresetTests {
 			presetspec.put( ComponentPreset.INNER_DIAMETER, 2.0);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("Preset underspecified"));
+			PresetTest.assertInvalidPresetException( ex,
+					null,
+			new String[] {
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}
 
@@ -95,7 +134,12 @@ public class TubeCouplerPresetTests {
 			presetspec.put( ComponentPreset.THICKNESS, 2.0);
 			ComponentPresetFactory.create(presetspec);
 		} catch ( InvalidComponentPresetException ex ) {
-			assertTrue("Wrong Exception Thrown", ex.getMessage().contains("Preset underspecified"));
+			PresetTest.assertInvalidPresetException( ex,
+					null,
+			new String[] {
+					"Preset dimensions underspecified"
+			}
+					);
 		}
 	}