Add generic comparison helper function

generic/generic.go

@@ -0,0 +1,26 @@
+package generic
+
+// EqualsAny checks if a base value of type T is equal to
+// any of the other values of type T provided as arguments.
+func EqualsAny[T comparable](base T, all ...T) bool {
+	for _, v := range all {
+		if v == base {
+			return true
+		}
+	}
+	return false
+}
+
+// EqualsAll checks if a base value of type T is equal to all of the
+// other values of type T provided as arguments.
+func EqualsAll[T comparable](base T, all ...T) bool {
+	if len(all) == 0 {
+		return false
+	}
+	for _, v := range all {
+		if v != base {
+			return false
+		}
+	}
+	return true
+}

generic/generic_test.go

@@ -0,0 +1,77 @@
+package generic
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestEqualsAnyInt(t *testing.T) {
+	testCases := []struct {
+		Base     int
+		All      []int
+		Expected bool
+	}{
+		{3, []int{1, 2, 3, 4}, true},
+		{5, []int{1, 2, 3, 4}, false},
+		{0, []int{0}, true},
+		{0, []int{1}, false},
+	}
+
+	for _, tc := range testCases {
+		actual := EqualsAny(tc.Base, tc.All...)
+		require.Equal(t, tc.Expected, actual)
+	}
+}
+
+func TestEqualsAnyString(t *testing.T) {
+	testCases := []struct {
+		Base     string
+		All      []string
+		Expected bool
+	}{
+		{"test", []string{"test1", "test", "test2", "test3"}, true},
+		{"test", []string{"test1", "test2", "test3", "test4"}, false},
+		{"", []string{""}, true},
+		{"", []string{"not empty"}, false},
+	}
+
+	for _, tc := range testCases {
+		actual := EqualsAny(tc.Base, tc.All...)
+		require.Equal(t, tc.Expected, actual)
+	}
+}
+
+func TestEqualsAllInt(t *testing.T) {
+	testCases := []struct {
+		Base     int
+		All      []int
+		Expected bool
+	}{
+		{5, []int{5, 5, 5, 5}, true},
+		{5, []int{1, 2, 3, 4}, false},
+		{0, []int{}, false},
+	}
+
+	for _, tc := range testCases {
+		actual := EqualsAll(tc.Base, tc.All...)
+		require.Equal(t, tc.Expected, actual)
+	}
+}
+
+func TestEqualsAllString(t *testing.T) {
+	testCases := []struct {
+		Base     string
+		All      []string
+		Expected bool
+	}{
+		{"test", []string{"test", "test", "test", "test"}, true},
+		{"test", []string{"test", "test1", "test2", "test3"}, false},
+		{"", []string{}, false},
+	}
+
+	for _, tc := range testCases {
+		actual := EqualsAll(tc.Base, tc.All...)
+		require.Equal(t, tc.Expected, actual)
+	}
+}