Package org.eclipse.epsilon.eunit.dt.diff

Interface IDifferenceViewer

All Known Implementing Classes:

EMFDifferenceViewer, FilesystemTreeDifferenceViewer, StringBasedDifferenceViewer

public interface IDifferenceViewer

Interface for showing the differences between the expected value and the actual value.

Author:

Antonio Garcia-Dominguez

Field Summary

Fields

Modifier and Type	Field	Description
static final String	EXTENSION_POINT_ID

Method Summary

Modifier and Type	Method	Description
boolean	canCompare(Object expected, Object actual, Object delta)	Returns true if this viewer can show the differences between the expected and the actual results.
void	compare(Object expected, Object actual, Object delta)	Shows the differences between the expected and actual values, which might have been precomputed or not.

Field Details

EXTENSION_POINT_ID

static final String EXTENSION_POINT_ID

See Also:

• Constant Field Values

Method Details

canCompare

boolean canCompare(Object expected,
 Object actual,
 Object delta)

Returns true if this viewer can show the differences between the expected and the actual results. This method will be called from the SWT thread.

Parameters:

expected - Expected value.

actual - Actual value.

delta - Precomputed differences, if available. Otherwise, null.

Returns:

true if this instance can either:

• compute and show the differences between expected and actual
• , or b) show the precomputed differences in delta.

Otherwise, returns false.

compare

void compare(Object expected,
 Object actual,
 Object delta)

Shows the differences between the expected and actual values, which might have been precomputed or not. This method will be called from the SWT thread. This method should only be called if canCompare(java.lang.Object, java.lang.Object, java.lang.Object) returned true with the same parameters.

Parameters:

expected - Expected value.

actual - Actual value.

delta - Precomputed difference, if available. Otherwise, null.