Use one stringbuilder per tag creation and add test

1 files changed, 22 insertions, 0 deletions

diff --git a/app/src/test/kotlin/com/pitchedapps/frost/injectors/TagObfuscatorTest.kt b/app/src/test/kotlin/com/pitchedapps/frost/injectors/TagObfuscatorTest.kt
new file mode 100644
index 00000000..5c316a4a
--- /dev/null
+++ b/app/src/test/kotlin/com/pitchedapps/frost/injectors/TagObfuscatorTest.kt
@@ -0,0 +1,22 @@
+package com.pitchedapps.frost.injectors
+
+import java.util.UUID
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class TagObfuscatorTest {
+
+    /**
+     * The same key should result in the same tag per session
+     */
+    @Test
+    fun consistentTags() {
+        val keys = generateSequence { UUID.randomUUID().toString() }.take(10).toSet()
+        val tags = keys.map {
+            val tag = generateSequence { TagObfuscator.obfuscateTag(it) }.take(10).toSet()
+            assertEquals(1, tag.size, "Key $it produced multiple tags: $tag")
+            tag.first()
+        }
+        assertEquals(keys.size, tags.size, "Key set and tag set have different sizes")
+    }
+}