Added printer tests

pkg/yqlib/printer_test.go

@@ -17,20 +17,22 @@ a: apple
 a: coconut
 `
 
+var multiDocSampleLeadingExpected = `# go cats
+---
+a: banana
+---
+a: apple
+---
+# cool
+a: coconut
+`
+
 func nodeToList(candidate *CandidateNode) *list.List {
 	elMap := list.New()
 	elMap.PushBack(candidate)
 	return elMap
 }
 
-func TestPrinterWithLeadingContentEvalStyle(t *testing.T) {
-	test.AssertResult(t, "todo", "")
-}
-
-func TestPrinterWithLeadingContentEvalAllStyle(t *testing.T) {
-	test.AssertResult(t, "todo", "")
-}
-
 func TestPrinterMultipleDocsInSequence(t *testing.T) {
 	var output bytes.Buffer
 	var writer = bufio.NewWriter(&output)
@@ -69,6 +71,45 @@ func TestPrinterMultipleDocsInSequence(t *testing.T) {
 	test.AssertResult(t, multiDocSample, output.String())
 }
 
+func TestPrinterMultipleDocsInSequenceWithLeadingContent(t *testing.T) {
+	var output bytes.Buffer
+	var writer = bufio.NewWriter(&output)
+	printer := NewPrinter(writer, false, true, false, 2, true)
+
+	inputs, err := readDocuments(strings.NewReader(multiDocSample), "sample.yml", 0)
+	if err != nil {
+		panic(err)
+	}
+
+	el := inputs.Front()
+	sample1 := nodeToList(el.Value.(*CandidateNode))
+
+	el = el.Next()
+	sample2 := nodeToList(el.Value.(*CandidateNode))
+
+	el = el.Next()
+	sample3 := nodeToList(el.Value.(*CandidateNode))
+
+	err = printer.PrintResults(sample1, "# go cats\n---\n")
+	if err != nil {
+		panic(err)
+	}
+
+	err = printer.PrintResults(sample2, "---\n")
+	if err != nil {
+		panic(err)
+	}
+
+	err = printer.PrintResults(sample3, "---\n# cool\n")
+	if err != nil {
+		panic(err)
+	}
+
+	writer.Flush()
+
+	test.AssertResult(t, multiDocSampleLeadingExpected, output.String())
+}
+
 func TestPrinterMultipleFilesInSequence(t *testing.T) {
 	var output bytes.Buffer
 	var writer = bufio.NewWriter(&output)
@@ -116,6 +157,53 @@ func TestPrinterMultipleFilesInSequence(t *testing.T) {
 	test.AssertResult(t, multiDocSample, output.String())
 }
 
+func TestPrinterMultipleFilesInSequenceWithLeadingContent(t *testing.T) {
+	var output bytes.Buffer
+	var writer = bufio.NewWriter(&output)
+	printer := NewPrinter(writer, false, true, false, 2, true)
+
+	inputs, err := readDocuments(strings.NewReader(multiDocSample), "sample.yml", 0)
+	if err != nil {
+		panic(err)
+	}
+
+	el := inputs.Front()
+	elNode := el.Value.(*CandidateNode)
+	elNode.Document = 0
+	elNode.FileIndex = 0
+	sample1 := nodeToList(elNode)
+
+	el = el.Next()
+	elNode = el.Value.(*CandidateNode)
+	elNode.Document = 0
+	elNode.FileIndex = 1
+	sample2 := nodeToList(elNode)
+
+	el = el.Next()
+	elNode = el.Value.(*CandidateNode)
+	elNode.Document = 0
+	elNode.FileIndex = 2
+	sample3 := nodeToList(elNode)
+
+	err = printer.PrintResults(sample1, "# go cats\n---\n")
+	if err != nil {
+		panic(err)
+	}
+
+	err = printer.PrintResults(sample2, "---\n")
+	if err != nil {
+		panic(err)
+	}
+
+	err = printer.PrintResults(sample3, "---\n# cool\n")
+	if err != nil {
+		panic(err)
+	}
+
+	writer.Flush()
+	test.AssertResult(t, multiDocSampleLeadingExpected, output.String())
+}
+
 func TestPrinterMultipleDocsInSinglePrint(t *testing.T) {
 	var output bytes.Buffer
 	var writer = bufio.NewWriter(&output)
@@ -135,6 +223,59 @@ func TestPrinterMultipleDocsInSinglePrint(t *testing.T) {
 	test.AssertResult(t, multiDocSample, output.String())
 }
 
+func TestPrinterMultipleDocsInSinglePrintWithLeadingDoc(t *testing.T) {
+	var output bytes.Buffer
+	var writer = bufio.NewWriter(&output)
+	printer := NewPrinter(writer, false, true, false, 2, true)
+
+	inputs, err := readDocuments(strings.NewReader(multiDocSample), "sample.yml", 0)
+	if err != nil {
+		panic(err)
+	}
+
+	err = printer.PrintResults(inputs, "# go cats\n---\n")
+	if err != nil {
+		panic(err)
+	}
+
+	writer.Flush()
+	expected := `# go cats
+---
+a: banana
+---
+a: apple
+---
+a: coconut
+`
+	test.AssertResult(t, expected, output.String())
+}
+
+func TestPrinterMultipleDocsInSinglePrintWithLeadingDocTrailing(t *testing.T) {
+	var output bytes.Buffer
+	var writer = bufio.NewWriter(&output)
+	printer := NewPrinter(writer, false, true, false, 2, true)
+
+	inputs, err := readDocuments(strings.NewReader(multiDocSample), "sample.yml", 0)
+	if err != nil {
+		panic(err)
+	}
+
+	err = printer.PrintResults(inputs, "---\n")
+	if err != nil {
+		panic(err)
+	}
+
+	writer.Flush()
+	expected := `---
+a: banana
+---
+a: apple
+---
+a: coconut
+`
+	test.AssertResult(t, expected, output.String())
+}
+
 func TestPrinterMultipleDocsJson(t *testing.T) {
 	var output bytes.Buffer
 	var writer = bufio.NewWriter(&output)