junit assertEquals ignore case

问题:

im just moving from c# -> java. I need to write some tests using junit. In my test i need to compare two strings to see if they match. So we also have the Assert.assertEquals, but this is case sensitive. How can i make it case insensitive? What i need is:

"blabla".equals("BlabLA")

to return true.

So in C#, we used to have :

public static void AreEqual (
    string expected,
    string actual,
    bool ignoreCase,
    string message
)

I was quickly going thru Junit docs, but i can't seem to find anything like this.

回答1:

I find that Hamcrest provides must better assertions than the default JUnit asserts. Hamcrest gives MANY MANY more options and provides better messages on failure. Some basic Hamcrest matchers are built into JUnit and JUnit has the assertThat built in so this is not something totally new. See the hamcrest.core package in the JUnit API here. Try IsEqualIgnoringCase which would look like this.

assertThat(myString, IsEqualIgnoringCase.equalToIgnoringCase(expected));

With static imports this would be

assertThat(myString, equalToIgnoringCase(expected));

if you want to get really fancy you would do:

assertThat(myString, is(equalToIgnoringCase(expected)));

One of the advantages of this is that a failure would state that expected someString but was someOtherString. As opposed to expected true got false when using assertTrue.

回答2:

Use

"blabla".equalsIgnoreCase("BlabLA") use for check equality ignore case

Then you can use

 assertTrue("blabla".equalsIgnoreCase("BlabLA"))

回答3:

There is no direct support for this assert in JUnit (assuming you are using JUnit of course), but you could use:

assertTrue("blabla".equalsIgnoreCase("BlabLA"))

It may be worth wrapping this in a separate helper method which provides a sensible failure message if they don't match (look at the docs for assertTrue to see how this could be done).

回答4:

What about:

assertEquals("blabla","BlabLA".toLowerCase());

or

assertEquals(expectedLowerCaseString,actualString.toLowerCase());

Then you can still see the difference if they are not equal.

回答5:

Have you looked at the String JavaDoc ?

"blabla".equalsIgnoreCase("BlabLA")

回答6:

You can use assertTrue(s1.equalsIgnoreCase(s2))

回答7:

Consider AssertJ (previously FEST) for your assertions, it's been my favorite assertion API for tests for years:

assertThat("blabla").isEqualToIgnoringCase("BlabLA");

回答8:

Check the equalsIgnoreCase from the string doc: