1 files changed, 43 insertions, 0 deletions
diff --git a/cmd/mfmt/util_test.go b/cmd/mfmt/util_test.go
new file mode 100644
index 0000000..e008e0b
--- /dev/null
+++ b/cmd/mfmt/util_test.go
@@ -0,0 +1,43 @@
+/* This file contains tests for utility functions used in the mfmt
+   binary.  Tests of the actual application are in main_test.go. */
+
+package main
+
+import (
+	"testing"
+
+	"git.thomasvoss.com/euro-cash.eu/mintages"
+)
+
+func TestFormatInt(t *testing.T) {
+	for _, x := range [...]struct {
+		n int
+		s string
+	}{
+		{0, "0"},
+		{123, "123"},
+		{81758, "81.758"},
+		{752759237528, "752.759.237.528"},
+		{mintages.Unknown, "?"},
+	} {
+		s := formatInt(x.n)
+		if s != x.s {
+			t.Fatalf(`Expected s="%s"; got "%s"`, x.s, s)
+		}
+	}
+}
+
+func TestIntLen(t *testing.T) {
+	for _, x := range [...]struct{ x, y int }{
+		{0, len("0")},
+		{123, len("123")},
+		{81758, len("81758")},
+		{752759237528, len("752759237528")},
+		{mintages.Unknown, len("?")},
+	} {
+		n := intlen(x.x)
+		if n != x.y {
+			t.Fatalf("Expected n=%d; got %d", x.y, n)
+		}
+	}
+}