I'm wondering whether measuring conditional code coverage by current tools for Java are not obsolete since Java 8 came up. With Java 8's Optional and Stream we can often avoid code branches/loops, which makes it easy to get very high conditional coverage without testing all possible execution paths. Let's compare old Java code with Java 8 code :

Before Java 8:

public String getName(User user) {
    if (user != null) {
        if (user.getName() != null) {
            return user.getName();
        }
    }
    return "unknown";
}

There are 3 possible execution paths in the above method. In order to get 100% of conditional coverage we need to create 3 unit tests.

Java 8:

public String getName(User user) {
    return Optional.ofNullable(user)
                   .map(User::getName)
                   .orElse("unknown");
}

In this case, branches are hidden and we only need 1 test to get 100% coverage and it doesn't matter which case we will test. Though there are still the same 3 logical branches which should be covered I believe. I think that it makes conditional coverage statistics completely untrusted these days.

Are there any tools that measure logical branches that can be created in Java 8? Are there any similar statistics spotting undertested code?

I'm wondering whether measuring conditional code coverage by current tools for Java are not obsolete since Java 8 came up. With Java 8's Optional and Stream we can often avoid code branches/loops, which makes it easy to get very high conditional coverage without testing all possible execution paths. Let's compare old Java code with Java 8 code :

Before Java 8:

public String getName(User user) {
    if (user != null) {
        if (user.getName() != null) {
            return user.getName();
        }
    }
    return "unknown";
}

There are 3 possible execution paths in the above method. In order to get 100% of conditional coverage we need to create 3 unit tests.

Java 8:

public String getName(User user) {
    return Optional.ofNullable(user)
                   .map(User::getName)
                   .orElse("unknown");
}

In this case, branches are hidden and we only need 1 test to get 100% coverage and it doesn't matter which case we will test. Though there are still the same 3 logical branches which should be covered I believe. I think that it makes conditional coverage statistics completely untrusted these days.

Does it make sense to measure conditional coverage for Java 8 code? Are there any other tools spotting undertested code?

I'm wondering whether measuring conditional code coverage by current tools for Java are not obsolete since Java 8 came up. With Java 8's Optional and Stream we can often avoid code branches/loops what makes it easy to get very high conditional coverage without testing all possible execution paths. Let's compare old Java code with Java 8.

Before Java 8:

public String getName(User user) {
    if (user != null) {
        if (user.getName() != null) {
            return user.getName();
        }
    }
    return "unknown";
}

There are 3 possible execution paths in above method, so to get 100% of conditional coverage we need to create 3 unit tests.

Java 8:

public String getName(User user) {
    return Optional.ofNullable(user)
                   .map(User::getName)
                   .orElse("unknown");
}

In this case branches are hidden and we only need 1 test to get 100% coverage and it doesn't matter which case we will test. Though there are still the same 3 logical branches which should be covered I believe. I think that it makes conditional coverage statistics completely untrusted these days.

Are there any tools that measure logical branches that can be created in Java 8? Are there any similar statistics spotting undertested code?

I'm wondering whether measuring conditional code coverage by current tools for Java are not obsolete since Java 8 came up. With Java 8's Optional and Stream we can often avoid code branches/loops, which makes it easy to get very high conditional coverage without testing all possible execution paths. Let's compare old Java code with Java 8 code :

Before Java 8:

public String getName(User user) {
    if (user != null) {
        if (user.getName() != null) {
            return user.getName();
        }
    }
    return "unknown";
}

There are 3 possible execution paths in the above method. In order to get 100% of conditional coverage we need to create 3 unit tests.

Java 8:

public String getName(User user) {
    return Optional.ofNullable(user)
                   .map(User::getName)
                   .orElse("unknown");
}

In this case, branches are hidden and we only need 1 test to get 100% coverage and it doesn't matter which case we will test. Though there are still the same 3 logical branches which should be covered I believe. I think that it makes conditional coverage statistics completely untrusted these days.

Are there any tools that measure logical branches that can be created in Java 8? Are there any similar statistics spotting undertested code?

I'm wondering whether measuring conditional code coverage by current tools for Java are not obsolete since Java 8 came up. With Java 8's Optional and Stream we can often avoid code branches/loops what makes it easy to get very high conditional coverage without testing all possible execution paths. Let's compare old Java code with Java 8.

Before Java 8:

public String getName(User user) {
    if (user != null) {
        if (user.getName() != null) {
            return user.getName();
        }
    }
    return "unknown";
}

There are 3 possible execution paths in above method, so to get 100% of conditional coverage we need to create 3 unit tests.

Java 8:

public String getName(User user) {
    return Optional.ofNullable(user)
                   .map(User::getName)
                   .orElse("unknown");
}

In this case branches are hidden and we only need 1 test to get 100% coverage and it doesn't matter which case we will test. Though there are still the same 3 logical branches which should be covered I believe. I think that it makes conditional coverage statistics completely untrusted these days.

Are there any tools that measure logical branches that can be created in Java 8? Are there any other statistics worth measuring?

I'm wondering whether measuring conditional code coverage by current tools for Java are not obsolete since Java 8 came up. With Java 8's Optional and Stream we can often avoid code branches/loops what makes it easy to get very high conditional coverage without testing all possible execution paths. Let's compare old Java code with Java 8.

Before Java 8:

public String getName(User user) {
    if (user != null) {
        if (user.getName() != null) {
            return user.getName();
        }
    }
    return "unknown";
}

There are 3 possible execution paths in above method, so to get 100% of conditional coverage we need to create 3 unit tests.

Java 8:

public String getName(User user) {
    return Optional.ofNullable(user)
                   .map(User::getName)
                   .orElse("unknown");
}

In this case branches are hidden and we only need 1 test to get 100% coverage and it doesn't matter which case we will test. Though there are still the same 3 logical branches which should be covered I believe. I think that it makes conditional coverage statistics completely untrusted these days.

Are there any tools that measure logical branches that can be created in Java 8? Are there any similar statistics spotting undertested code?