Backend: Move pluscode package to /pkg/geo/pluscode

Signed-off-by: Michael Mayer <michael@photoprism.app>

pkg/geo/pluscode/pluscode_test.go

@@ -0,0 +1,109 @@
+package pluscode
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestEncode(t *testing.T) {
+	t.Run("germany", func(t *testing.T) {
+		plusCode := Encode(48.56344833333333, 8.996878333333333)
+
+		expected := "8FWCHX7W+"
+
+		assert.Equal(t, expected, plusCode)
+	})
+
+	t.Run("lat_overflow", func(t *testing.T) {
+		plusCode := Encode(548.56344833333333, 8.996878333333333)
+
+		assert.Equal(t, "", plusCode)
+	})
+
+	t.Run("lng_overflow", func(t *testing.T) {
+		plusCode := Encode(48.56344833333333, 258.996878333333333)
+
+		assert.Equal(t, "", plusCode)
+	})
+}
+
+func TestEncodeLength(t *testing.T) {
+	t.Run("germany_9", func(t *testing.T) {
+		plusCode, err := EncodeLength(48.56344833333333, 8.996878333333333, 9)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		expected := "8FWCHX7W+9Q"
+
+		assert.Equal(t, expected, plusCode)
+	})
+
+	t.Run("germany_8", func(t *testing.T) {
+		plusCode, err := EncodeLength(48.56344833333333, 8.996878333333333, 8)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		expected := "8FWCHX7W+"
+
+		assert.Equal(t, expected, plusCode)
+	})
+
+	t.Run("germany_7", func(t *testing.T) {
+		plusCode, err := EncodeLength(48.56344833333333, 8.996878333333333, 7)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		expected := "8FWCHX7W+"
+
+		assert.Equal(t, expected, plusCode)
+	})
+
+	t.Run("germany_6", func(t *testing.T) {
+		plusCode, err := EncodeLength(48.56344833333333, 8.996878333333333, 6)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		expected := "8FWCHX00+"
+
+		assert.Equal(t, expected, plusCode)
+	})
+
+	t.Run("lat_overflow", func(t *testing.T) {
+		plusCode, err := EncodeLength(548.56344833333333, 8.996878333333333, 7)
+		if err == nil {
+			t.Fatal("encode should return error")
+		}
+		assert.Equal(t, "", plusCode)
+	})
+
+	t.Run("lng_overflow", func(t *testing.T) {
+		plusCode, err := EncodeLength(48.56344833333333, 258.996878333333333, 7)
+		if err == nil {
+			t.Fatal("encode should return error")
+		}
+		assert.Equal(t, "", plusCode)
+	})
+}
+
+func TestS2(t *testing.T) {
+	t.Run("germany", func(t *testing.T) {
+		token := S2("8FWCHX7W+")
+
+		assert.Equal(t, "4799e3772d14", token)
+	})
+	t.Run("empty code", func(t *testing.T) {
+		token := S2("")
+
+		assert.Equal(t, "", token)
+	})
+	t.Run("invalid code", func(t *testing.T) {
+		token := S2("xxx")
+
+		assert.Equal(t, "", token)
+	})
+}