Package org.assertj.core.util
Class Throwables
- java.lang.Object
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- org.assertj.core.util.Throwables
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static void
appendStackTraceInCurrentThreadToThrowable(Throwable t, String methodToStartFrom)
Appends the stack trace of the current thread to the one in the given
.Throwable
static Throwable
getRootCause(Throwable throwable)
Get the root cause (ie the last non null cause) from aThrowable
.static String
getStackTrace(Throwable throwable)
static void
removeAssertJRelatedElementsFromStackTrace(Throwable throwable)
Removes the AssertJ-related elements from the
stack trace that have little value for end user.Throwable
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Method Detail
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appendStackTraceInCurrentThreadToThrowable
public static void appendStackTraceInCurrentThreadToThrowable(Throwable t, String methodToStartFrom)
Appends the stack trace of the current thread to the one in the given
.Throwable
- Parameters:
t
- the givenThrowable
.methodToStartFrom
- the name of the method used as the starting point of the current thread's stack trace.
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removeAssertJRelatedElementsFromStackTrace
public static void removeAssertJRelatedElementsFromStackTrace(Throwable throwable)
Removes the AssertJ-related elements from the
stack trace that have little value for end user. Therefore, instead of seeing this:Throwable
We get this:org.junit.ComparisonFailure: expected:<'[Ronaldo]'> but was:<'[Messi]'> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:501) at org.assertj.core.error.ConstructorInvoker.newInstance(ConstructorInvoker.java:34) at org.assertj.core.error.ShouldBeEqual.newComparisonFailure(ShouldBeEqual.java:111) at org.assertj.core.error.ShouldBeEqual.comparisonFailure(ShouldBeEqual.java:103) at org.assertj.core.error.ShouldBeEqual.newAssertionError(ShouldBeEqual.java:81) at org.assertj.core.internal.Failures.failure(Failures.java:76) at org.assertj.core.internal.Objects.assertEqual(Objects.java:116) at org.assertj.core.api.AbstractAssert.isEqualTo(AbstractAssert.java:74) at examples.StackTraceFilterExample.main(StackTraceFilterExample.java:13)
org.junit.ComparisonFailure: expected:<'[Ronaldo]'> but was:<'[Messi]'> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at examples.StackTraceFilterExample.main(StackTraceFilterExample.java:20)
- Parameters:
throwable
- theThrowable
to filter stack trace.
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getRootCause
public static Throwable getRootCause(Throwable throwable)
Get the root cause (ie the last non null cause) from aThrowable
.- Parameters:
throwable
- theThrowable
to get root cause from.- Returns:
- the root cause if any, else
null
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getStackTrace
public static String getStackTrace(Throwable throwable)
Get the stack trace from aThrowable
as aString
.The result of this method vary by JDK version as this method uses
Throwable.printStackTrace(java.io.PrintWriter)
. On JDK1.3 and earlier, the cause exception will not be shown unless the specified throwable alters printStackTrace.- Parameters:
throwable
- theThrowable
to get stack trace from.- Returns:
- the stack trace as a
String
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