Added encoder tests

pkg/yqlib/encoder_csv_test.go

@@ -0,0 +1,47 @@
+package yqlib
+
+import (
+	"bufio"
+	"bytes"
+	"strings"
+	"testing"
+
+	"github.com/mikefarah/yq/v4/test"
+)
+
+func yamlToCsv(sampleYaml string, separator rune) string {
+	var output bytes.Buffer
+	writer := bufio.NewWriter(&output)
+
+	var jsonEncoder = NewCsvEncoder(writer, separator)
+	inputs, err := readDocuments(strings.NewReader(sampleYaml), "sample.yml", 0)
+	if err != nil {
+		panic(err)
+	}
+	node := inputs.Front().Value.(*CandidateNode).Node
+	err = jsonEncoder.Encode(node)
+	if err != nil {
+		panic(err)
+	}
+	writer.Flush()
+
+	return strings.TrimSuffix(output.String(), "\n")
+}
+
+var sampleYaml = `["apple", apple2, "comma, in, value", "new
+line", 3, 3.40, true, "tab	here"]`
+
+func TestCsvEncoder(t *testing.T) {
+	var expectedCsv = `apple,apple2,"comma, in, value",new line,3,3.40,true,tab	here`
+
+	var actualCsv = yamlToCsv(sampleYaml, ',')
+	test.AssertResult(t, expectedCsv, actualCsv)
+}
+
+func TestTsvEncoder(t *testing.T) {
+
+	var expectedCsv = `apple	apple2	comma, in, value	new line	3	3.40	true	"tab	here"`
+
+	var actualCsv = yamlToCsv(sampleYaml, '\t')
+	test.AssertResult(t, expectedCsv, actualCsv)
+}