From 27c7d28897b8795c153f6f8504d45dfeaeff5a17 Mon Sep 17 00:00:00 2001
From: Tim <TimothyStiles@users.noreply.github.com>
Date: Fri, 5 Jan 2024 14:08:57 -0800
Subject: [PATCH] added some more test coverage to fold subpackage. (#436)

---
 fold/fold_test.go    | 11 +++++++++++
 fold/seqfold_test.go | 43 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 54 insertions(+)
 create mode 100644 fold/seqfold_test.go

diff --git a/fold/fold_test.go b/fold/fold_test.go
index 8be9275f8..786d0a9a9 100644
--- a/fold/fold_test.go
+++ b/fold/fold_test.go
@@ -1,6 +1,7 @@
 package fold
 
 import (
+	"fmt"
 	"math"
 	"strings"
 	"testing"
@@ -201,3 +202,13 @@ func TestFold(t *testing.T) {
 		assert.InDelta(t, struc.energy, -4.2, 0.2)
 	})
 }
+func TestZuker_ErrorCreatingFoldingContext(t *testing.T) {
+	seq := "ATGGATTTAGATAGATADFQ#(RSDOFIA)"
+	temp := 4000.0
+
+	expectedErr := fmt.Errorf("error creating folding context: the sequence ATGGATTTAGATAGATADFQ#(RSDOFIA) is not RNA or DNA")
+
+	_, err := Zuker(seq, temp)
+	require.Error(t, err)
+	assert.Equal(t, expectedErr.Error(), err.Error())
+}
diff --git a/fold/seqfold_test.go b/fold/seqfold_test.go
new file mode 100644
index 000000000..e14a20a10
--- /dev/null
+++ b/fold/seqfold_test.go
@@ -0,0 +1,43 @@
+package fold
+
+import (
+	"fmt"
+	"math"
+	"testing"
+)
+
+func TestResult_MinimumFreeEnergy_LengthZero(t *testing.T) {
+	result := Result{} // Create a Result instance with empty structs
+
+	expectedEnergy := math.Inf(1)
+	actualEnergy := result.MinimumFreeEnergy()
+
+	if actualEnergy != expectedEnergy {
+		t.Errorf("expected energy to be %f, but got %f", expectedEnergy, actualEnergy)
+	}
+}
+
+func TestResult_DotBracket_LengthZero(t *testing.T) {
+	result := Result{} // Create a Result instance with empty structs
+
+	expectedDotBracket := ""
+	actualDotBracket := result.DotBracket()
+
+	if actualDotBracket != expectedDotBracket {
+		t.Errorf("expected dot bracket to be %s, but got %s", expectedDotBracket, actualDotBracket)
+	}
+}
+
+func TestNewFoldingContext_InvalidSequence(t *testing.T) {
+	seq := "XYZ"
+	temp := 37.0
+
+	_, err := newFoldingContext(seq, temp)
+	if err == nil {
+		t.Errorf("expected error, but got nil")
+	}
+	expectedError := fmt.Errorf("the sequence %s is not RNA or DNA", seq)
+	if err.Error() != expectedError.Error() {
+		t.Errorf("expected error message to be %q, but got %q", expectedError.Error(), err.Error())
+	}
+}