Create species, cleanup schema.

- create species
- species genus_id not null

datastore/species_test.go

@@ -35,3 +35,31 @@ func TestSpeciesStore_Get_db(t *testing.T) {
 		t.Errorf("got species %+v, want %+v", species, want)
 	}
 }
+
+func TestSpeciesStore_Create_db(t *testing.T) {
+	tx, _ := DB.Begin()
+	defer tx.Rollback()
+
+	// Test on a clean database
+	tx.Exec(`DELETE FROM species;`)
+
+	genus := &models.Genus{}
+	if err := tx.Insert(genus); err != nil {
+		t.Fatal(err)
+	}
+
+	species := &models.Species{Id: 1, GenusId: genus.Id, SpeciesName: "Test Species"}
+
+	d := NewDatastore(tx)
+	created, err := d.Species.Create(species)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if !created {
+		t.Error("!created")
+	}
+	if species.Id == 0 {
+		t.Error("want nonzero species.Id after submitting")
+	}
+}