Add complex keys (#774)

This allows to add new kinds of keys that need more data without making
KeyValue's footprint bigger for common keys.

This changes the [_symbol] field into [_payload], which holds the same
as the previous field for more common keys but can hold bigger objects
for keys of the new "Complex" kind.

This also adds a complex key: String keys with a symbol different than
the outputted string.

Unit tests are added as the Java language is not helpful in making
robust code.

1 files changed, 8 insertions, 3 deletions

diff --git a/build.gradle b/build.gradle
index de9efde..0cb6160 100644
--- a/build.gradle
+++ b/build.gradle
@@ -2,6 +2,10 @@ plugins {
   id 'com.android.application' version '8.1.1'
 }
 
+dependencies {
+  testImplementation "junit:junit:4.13.2"
+}
+
 android {
   namespace 'juloo.keyboard2'
   compileSdk 34
@@ -21,6 +25,10 @@ android {
       res.srcDirs = ['res', 'build/generated-resources']
       assets.srcDirs = ['assets']
     }
+
+    test {
+      java.srcDirs = ['test']
+    }
   }
 
   signingConfigs {
@@ -84,9 +92,6 @@ android {
   }
 }
 
-dependencies {
-}
-
 tasks.register('buildKeyboardFont') {
   println "\nBuilding assets/special_font.ttf"
   mkdir "$buildDir"