add unit testing

day-1/main_test.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	assert "AoC2021/utils/testing"
+	"testing"
+)
+
+func TestPrintPip(t *testing.T) {
+	DEBUG = false
+	str := GetPip(1, 1, 1, 100)
+	assert.StrEquals(t, str, "", "Should return an empty string")
+
+	DEBUG = true
+	cases := []struct {
+		first, previous, current, total int
+		expected, msg                   string
+	}{
+		{-1, -1, -1, -1, ".", ""},
+		{-1, 0, 0, 42, ".", ""},
+		{100, 100, 200, 42, "+", ""},
+		{100, 200, 100, 42, "-", ""},
+		{100, 100, 100, 100, ".\n", "should include newline"},
+	}
+
+	for _, c := range cases {
+		str := GetPip(c.first, c.previous, c.current, c.total)
+		assert.StrEquals(t, str, c.expected, c.msg)
+	}
+
+}