Wrote a test that runs ska on the example file specifying auto for th…

…e --min-count flag

tests/fastq_input.rs

@@ -508,3 +508,20 @@ fn cov_check() {
         .assert()
         .failure();
 }
+
+#[test]
+fn build_auto_check() {
+    let sandbox = TestSetup::setup();
+
+    let rfile_name = sandbox.create_rfile("test", FxType::Fastq);
+    Command::new(cargo_bin("ska"))
+        .current_dir(sandbox.get_wd())
+        .arg("build")
+        .arg("-f")
+        .arg(rfile_name)
+        .arg("-o")
+        .arg("reads")
+        .args(["--min-count", "auto", "-v", "-k", "9", "--min-qual", "2"])
+        .assert()
+        .success();
+}