How to assert greater than using JUnit Assert

Question

I have these values coming from a test  previousTokenValues 1     1378994409108  currentTokenValues 1     1378994416509    and I try         current timestamp is greater     assertTrue Long parseLong previousTokenValues 1    gt  Long parseLong currentTokenValues 1       I get the java lang AssertionError and detailMessage on debugging is null   How can I assert greater than conditions in using JUnit

User · Answer

Alternatively if adding extra library such as hamcrest is not desirable  the logic can be implemented as utility method using junit dependency only   public static void assertGreaterThan int greater  int lesser        assertGreaterThan greater  lesser  null      public static void assertGreaterThan int greater  int lesser  String message        if  greater  lt   lesser            fail  StringUtils isNotBlank message    message        gt                             Expected  a value greater than  lt     lesser     gt  n                     But  lt     greater     gt  was      greater    lesser    equal to     less than        lt     lesser     gt

User · Answer

assertTrue  your message   previousTokenValues 1  compareTo currentTokenValues 1    gt  0    this passes for previous   current values

User · Answer

You should add Hamcrest-library to your Build Path  It contains the needed Matchers class which has the lessThan   method   Dependency as below    lt dependency gt     lt groupId gt org hamcrest lt  groupId gt     lt artifactId gt hamcrest-library lt  artifactId gt     lt version gt 1 3 lt  version gt     lt scope gt test lt  scope gt   lt  dependency gt

User · Answer

Just how you ve done it  assertTrue boolean  also has an overload assertTrue String  boolean  where the String is the message in case of failure  you can use that if you want to print that such-and-such wasn t greater than so-and-so   You could also add hamcrest-all as a dependency to use matchers  See https   code google com p hamcrest wiki Tutorial   import static org hamcrest MatcherAssert assertThat  import static org hamcrest Matchers     assertThat  timestamp              Long parseLong previousTokenValues 1               greaterThan Long parseLong currentTokenValues 1        That gives an error like   java lang AssertionError  timestamp Expected  a value greater than  lt 456L gt       but   lt 123L gt  was less than  lt 456L gt

User · Answer

You can put it like this    assertTrue  your fail message   Long parseLong previousTokenValues 1    gt  Long parseLong currentTokenValues 1

User · Answer

you can also try below simple soln   previousTokenValues 1     1378994409108   currentTokenValues 1     1378994416509    Long prev   Long parseLong previousTokenValues 1    Long curr   Long parseLong currentTokenValues 1     Assert assertTrue prev   gt  curr

User · Answer

When using JUnit asserts  I always make the message nice and clear  It saves huge amounts of time debugging   Doing it this way avoids having to add a added dependency on hamcrest Matchers   previousTokenValues 1     1378994409108   currentTokenValues 1     1378994416509    Long prev   Long parseLong previousTokenValues 1    Long curr   Long parseLong currentTokenValues 1    assertTrue  Previous      prev      should be greater than current      curr        prev  gt  curr

User · Answer

As I recognize  at the moment  in JUnit  the syntax is like this   AssertTrue Long parseLong previousTokenValues 1    gt  Long parseLong currentTokenValues 1     your fail message       Means that  the condition is in front of the message

[java] How to assert greater than using JUnit Assert?

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