Matcher ScalarHasValue has to override describeMismatchSafely for better output

[proshin-roman]

Currently, ScalarHasValue doesn't override method describeMismatchSafely that leads to the next problem:

final ScalarHasValue<String> matcher =
    new ScalarHasValue<>(new IsEqual<>("expected"));
final Scalar<String> scalar = new UncheckedScalar<>(() -> "actual");
final StringDescription description = new StringDescription();
matcher.describeMismatch(scalar, description);
System.out.println(description.toString());
// the out is:
// was <org.cactoos.scalar.UncheckedScalar@368239c8>
// how it should look like:
// was "actual"

so it prints an actual version incorrectly: default toString method is called for the Scalar.

Expected:

• the value of scalar is printed as an actual value of matching.

What should be fixed

• class ScalarHasValue has to override method describeMismatchSafely and convert Scalar to String properly.

[0crat]

@llorllale/z please, pay attention to this issue

[llorllale]

@proshin-roman let's put this on hold while #751 is sorted out

[proshin-roman]

@llorllale yeah, ok, let's wait

[llorllale]

@proshin-roman matchers were moved to llorllale/cactoos-matchers as per #751. Please open this issue here

[0crat]

There is an unrecoverable failure on my side. Please, submit it here:

PID: 4@25988aaf-ee2f-4146-a0f5-fd10756db4a7, thread: AsyncFlush-4
com.zerocracy.farm.reactive.StkGroovy[125] java.lang.IllegalStateException: java.lang.reflect.InvocationTargetException in com/zerocracy/stk/pm/in/orders/close_job.groovy
sun.reflect.NativeMethodAccessorImpl[-2] java.lang.reflect.InvocationTargetException: null
com.zerocracy.farm.strict.StrictProject[111] java.lang.IllegalArgumentException: File "blanks/proshin-roman.xml" is not accessible in "PMO"

1.0-SNAPSHOT: CID: 1321938267, Type: 'Close job', Author: llorllale