Adding CSV parser and tests

internal/csvparser/parser.go

@@ -0,0 +1,36 @@
+package csvparser
+
+import (
+	"encoding/csv"
+	"io"
+	"os"
+)
+
+// CsvLine holds a single line from the source CSV file
+type CsvLine struct {
+	Code string
+	Name string
+}
+
+// ParseFile parses a given CSV file and returns a slice of CsvLine
+func ParseFile(file string) ([]CsvLine, error) {
+	csvfile, err := os.Open(file)
+	if err != nil {
+		return nil, err
+	}
+
+	r := csv.NewReader(csvfile)
+	var lines []CsvLine
+
+	for {
+		record, err := r.Read()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			return nil, err
+		}
+		lines = append(lines, CsvLine{Code: record[0], Name: record[1]})
+	}
+	return lines, nil
+}

internal/csvparser/parser_test.go

@@ -0,0 +1,45 @@
+package csvparser
+
+import (
+	"errors"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+// TestCsvParser tests the correct function of the CSV file parser
+func TestCsvParser(t *testing.T) {
+	check := []CsvLine{
+		{Code: "Foo", Name: "bar"},
+		{Code: "Bla", Name: "blub"},
+		{Code: "Nom", Name: "LoL"},
+		{Code: "123", Name: "256"},
+		{Code: "Rawr", Name: "Bla"},
+		{Code: "Lorem ipsum", Name: "dolor \"sit amet"},
+		{Code: "Smile", Name: "😇"},
+		{Code: "empty", Name: ""},
+	}
+	parsed, err := ParseFile(filepath.Join("..", "..", "test", "data", "csvparser.csv"))
+	if err != nil {
+		t.Fatalf("Got error: %+v", err)
+	}
+	if len(parsed) != len(check) {
+		t.Fatalf("Slice-length mismatch, got %d, expected %d", len(parsed), len(check))
+	}
+	for i, item := range check {
+		if item != parsed[i] {
+			t.Errorf("Got wrong CSV line, got %s, expected %s", parsed[i], item)
+		}
+	}
+}
+
+func TestCsvParserFileError(t *testing.T) {
+	_, err := ParseFile("nonexisting")
+	if err == nil {
+		t.Fatalf("Got no error")
+	}
+	if !errors.Is(err, os.ErrNotExist) {
+		t.Errorf("Got error %+v, expected %+v", err, os.ErrNotExist)
+	}
+
+}

test/data/csvparser.csv

@@ -0,0 +1,11 @@
+Foo,bar
+Bla,blub
+
+Nom,LoL
+123,256
+"Rawr",Bla
+"Lorem ipsum","dolor ""sit amet"
+
+
+Smile,😇
+empty,