[#5] Add coverage making function

Signed-off-by: Ekaterina Lebedeva <ekaterina.lebedeva@yadro.com>

covertest/client.go

@@ -1,8 +1,12 @@
 package covertest
 
 import (
+	"fmt"
+	"os"
+	"strings"
 	"testing"
 
+	"github.com/nspcc-dev/neo-go/pkg/compiler"
 	"github.com/nspcc-dev/neo-go/pkg/core"
 	"github.com/nspcc-dev/neo-go/pkg/core/block"
 	"github.com/nspcc-dev/neo-go/pkg/core/transaction"
@@ -131,3 +135,110 @@ func TestInvoke(bc *core.Blockchain, tx *transaction.Transaction) ([]InstrHash,
 	ops, err := Run(ic.VM)
 	return ops, ic.VM, err
 }
+
+type coverline struct {
+	Doc       string
+	Opcode    int
+	StartLine int
+	StartCol  int
+	EndLine   int
+	EndCol    int
+	WTFnumber int
+	IsCovered bool
+}
+
+// MakeCoverage generates an output file with coverage info in correct format
+func (c *ContractInvoker) MakeCoverage(t testing.TB, ctrdi *ContractWithDebugInfo, ctrPath string, fileName string) {
+	docs := getDocuments(t, ctrdi.DebugInfo.Documents, ctrPath)
+	cov := getSeqPoints(t, ctrdi.DebugInfo, docs)
+	for _, iMethod := range c.Methods {
+		countInstructions(cov, iMethod.Instructions)
+	}
+	printToFile(t, cov, fileName)
+}
+
+func getDocuments(t testing.TB, docs []string, substr string) []int {
+	res := make([]int, 0, len(docs))
+
+	for i, cDoc := range docs {
+		if strings.Contains(cDoc, substr) {
+			res = append(res, i)
+		}
+	}
+	if len(res) == 0 {
+		t.Log("Cannot get document\n")
+		t.FailNow()
+	}
+	return res
+}
+
+func getSeqPoints(t testing.TB, di *compiler.DebugInfo, docs []int) []coverline {
+	res := make([]coverline, 0, 10)
+
+	for _, method := range di.Methods {
+		maxLine := method.Range.End
+		for _, seqPoint := range method.SeqPoints {
+			if isValidDocument(seqPoint.Document, docs) && seqPoint.Opcode < int(maxLine) {
+				res = append(res, coverline{
+					Doc:       di.Documents[seqPoint.Document],
+					Opcode:    seqPoint.Opcode,
+					StartLine: seqPoint.StartLine,
+					StartCol:  seqPoint.StartCol,
+					EndLine:   seqPoint.EndLine,
+					EndCol:    seqPoint.EndCol,
+					WTFnumber: 1,
+					IsCovered: false,
+				})
+			}
+		}
+	}
+	return res
+}
+
+func isValidDocument(iDocToCheck int, docs []int) bool {
+	for _, iDoc := range docs {
+		if iDoc == iDocToCheck {
+			return true
+		}
+	}
+	return false
+}
+
+func countInstructions(cov []coverline, codes []InstrHash) {
+	for i := 0; i < len(cov); i++ {
+		for _, code := range codes {
+			if code.Offset == cov[i].Opcode {
+				cov[i].IsCovered = true
+				//cov[i].WTFnumber++
+				//break
+			}
+		}
+	}
+}
+
+func printToFile(t testing.TB, cov []coverline, name string) {
+	f, err := os.OpenFile(name, os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0600)
+	require.NoError(t, err)
+
+	defer f.Close()
+
+	fi, err := os.Stat(name)
+	require.NoError(t, err)
+	firstToWrite := ""
+	if fi.Size() == 0 {
+		firstToWrite = "mode: set\n"
+	}
+
+	_, err = f.WriteString(firstToWrite)
+	require.NoError(t, err)
+
+	for _, info := range cov {
+		covered := 0
+		if info.IsCovered {
+			covered++
+		}
+		line := fmt.Sprintf("%s:%d.%d,%d.%d %d %d\n", info.Doc, info.StartLine, info.StartCol, info.EndLine, info.EndCol, info.WTFnumber, covered)
+		_, err = f.WriteString(line)
+		require.NoError(t, err)
+	}
+}