Unit Tests: Extract Sequences from Genome (*.gbk) Files

Write unit tests in [SequenceUtilsTest.java](../blob/master/src/test/java/cs321/create/SequenceUtilsTest.java) for extracting the list of DNA sequences from a `*.gbk` genome input file.

The structure of the `*.gbk` file is described in the [README.md, section 3.1. Input Files](../blob/master/README.md#31-input-files)

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Copy :scissors: and paste :clipboard: the markdown below in your own task:
```markdown
Write unit tests in [SequenceUtilsTest.java](../blob/master/src/test/java/cs321/create/SequenceUtilsTest.java) for extracting the list of DNA sequences from a `*.gbk` genome input file.

The structure of the `*.gbk` file is described in the [README.md, section 3.1. Input Files](../blob/master/README.md#31-input-files)
```