Comments (20)
Assuming there is no matcher for regular expressions, you may consider to rewrite your assertion to something like this:
assertThat("Expected result matches regular expression",
expected.matches(regularExpression),
is(true));
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I end up writing one every single project I work on.
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hamcrest-text-patterns does the opposite thing than I asked for.
Ok, cthul looks nice, however I think that matching against a regex is such a core functionality that you should not require users to use third-party libraries. This would be the same bizzare situation as with C++ failing to provide a standard regex implementation. I think that when you write some test code, you constantly come across writing assertions making use of regular expressions. See how RSpec constructed its documentations: regexes are emphasised there.
As cthul is MIT-licensed, I suggest you copy the regex-related classes to hamcrest-library, adding cthul authors to the contributor list (to fulfil the legal licence requirements).
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Derbeth is right. Hamcrest ought to have a simple, non-verbose regex matcher. There are many good reasons to and no good reasons not to.
The point is, I should be able write something like this:
Matcher<String> regexMatcher = Matchers.matchesRegex([insert regex expression here]);
Quick. Easy. Simple. No third party integrations required, no matter how clean.
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This would be awesome, one of the great thing about Hamcrest is the clear diagnostics.
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@jm2dev I don't understand your point. Where does the actual value go? Also, if it fails, you just get an expected: true, was: false.
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Here the one (i found it on google page of hamcrest) - https://github.com/derari/cthul/wiki/Matchers#string-matchers
Also, u can find some other here - https://github.com/yandex-qatools/matchers-java
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For followers, confirm there is a MatchesPattern.matchesPattern(String regex)
and MatchesPattern.matchesPattern(Pattern pattern)
in 2.0, ex: assertThat(myString, matchesPattern("my regex"))
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There's also http://code.google.com/p/hamcrest-text-patterns/
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In what way does hamcrest-text-patterns do the opposite thing to what you asked for? It is a hamcrest matcher that matches strings against regular expressions. What do you want?
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Ok, you are right, the section "Matching" shows regex-like matching, however, if I understand correctly, you need to use library builders to construct a matcher and you are not allowed to use normal regular expressions given as strings. I find this way of writing assertions way to verbose in many cases.
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Is there an objection to implementing this, or just no commits / pull requests for it?
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No objection. There used to be a RegexMatcher in Hamcrest but it got removed because it made supporting different JDK versions difficult. But that was a very long time ago; Hamcrest no longer supports JDK versions without java.util.Pattern.
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Any idea when there might be a release with this matcher in? So far, i've copied and pasted it into two projects, and i'm going to die of shame if i have to do it again!
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@tomwhoiscontrary Maybe soon #65
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+1
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It turns out this was released as part of java-hamcrest
2.0.0.0 -- you'll also want to add hamcrest-junit
to your project if you upgrade from 1.3, and use its assertThat()
instead of the one in jUnit 4.
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Is Hamcrest 2 actually a thing? I thought it was an abortive sally.
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There doesn't seem to be much documentation, but it's published to Maven Central. I was able to put it & the new JUnit integration in pom.xml
and get my project building.
The main issue was I couldn't import static org.junit.Assert.*;
anymore (for older test cases that still use assertEquals
, etc.) because the two different assertThat()
implementations got ambiguous.
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matchesRegex
There is no such method, can you please let me know which version hamcrest you are refering?
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Related Issues (20)
- assertThat(this.object, hasProperty("booleanName")) fails to match boolean types and renames the property HOT 1
- The matcher contains() is misleading HOT 2
- FR: Matching maps with various type HOT 1
- oss-fuzz integration
- Participitation in Hacktoberfest? HOT 1
- HasProperty Matcher doesn't work with Java Records HOT 4
- assertThat(Int::class.java, typeCompatibleWith(Number::class.java)) in kotlin always fails
- hamcrest matching on actual empty list fails with nosuchmethoderror HOT 1
- Test output Alignment
- record version fails the hasProperty HOT 2
- has property fails with non public class.. not sure if this correct as per java standards of property
- Double "close-to" matcher that uses the ULP.
- GraalVM Native Image support HOT 4
- Inquiry about Project Activity and Future Plans HOT 15
- Compatibility in java versions HOT 2
- Upgrade build to JDK 1.8 bytecode HOT 1
- Upgrade to latest Gradle HOT 1
- Publish to Maven Central using GitHub Actions HOT 6
- Hamcrest v3.1
- Hamcrest v4.0
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