Data commit

Task/Validate-International-Securities-Identification-Number/Go/validate-international-securities-identification-number-1.go

@@ -0,0 +1,30 @@
+package main
+
+import "regexp"
+
+var r = regexp.MustCompile(`^[A-Z]{2}[A-Z0-9]{9}\d$`)
+
+var inc = [2][10]int{
+	{0, 1, 2, 3, 4, 5, 6, 7, 8, 9},
+	{0, 2, 4, 6, 8, 1, 3, 5, 7, 9},
+}
+
+func ValidISIN(n string) bool {
+	if !r.MatchString(n) {
+		return false
+	}
+	var sum, p int
+	for i := 10; i >= 0; i-- {
+		p = 1 - p
+		if d := n[i]; d < 'A' {
+			sum += inc[p][d-'0']
+		} else {
+			d -= 'A'
+			sum += inc[p][d%10]
+			p = 1 - p
+			sum += inc[p][d/10+1]
+		}
+	}
+	sum += int(n[11] - '0')
+	return sum%10 == 0
+}

Task/Validate-International-Securities-Identification-Number/Go/validate-international-securities-identification-number-2.go

@@ -0,0 +1,26 @@
+package main
+
+import "testing"
+
+func TestValidISIN(t *testing.T) {
+	testcases := []struct {
+		isin  string
+		valid bool
+	}{
+		{"US0378331005", true},
+		{"US0373831005", false},
+		{"U50378331005", false},
+		{"US03378331005", false},
+		{"AU0000XVGZA3", true},
+		{"AU0000VXGZA3", true},
+		{"FR0000988040", true},
+	}
+
+	for _, testcase := range testcases {
+		actual := ValidISIN(testcase.isin)
+		if actual != testcase.valid {
+			t.Errorf("expected %v for %q, got %v",
+				testcase.valid, testcase.isin, actual)
+		}
+	}
+}