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You should use .toHaveReturnedTimes to make sure that a mock function returned successfully (i.e., did not throw an error) an exact number of times. Any calls to the mock function that throw an error will not be counted toward the number of times the function returned....
Python doesn’t have a direct equivalent of undefined, but a None value is used to indicate an absence of value. Example: Code: x=Noneprint(x)#Output:None Copy Other Languages C++/Java:Using uninitialized variables is considered unsafe, and compilers often throw warnings or errors. Ruby:Simil...
throw new ConfigError('the JDK you are using is wrong'); } test('compiling android will go as expected', () => { expect(compileAndroidCode).toThrow(); expect(compileAndroidCode).toThrow(ConfigError); // You may also use the exact error message or a regexp expect(compileAndroidCode)....
This will show you the version of yarn you installed else, it will throw a command not registered error. Check that yarn is contained in your path. Installing yarn is the first step to working with yarn, it enables you to create a yarn project, migrate from npm, if you want to create...