Added tests for locale system

Author: Patrick Sachs

test/logic/index.js

@@ -1,7 +1,9 @@
 import syntaxTest from "./syntax";
+import localeTest from "./locale";
 
 function run() {
   syntaxTest();
+  localeTest();
   // ... Add more logic specifc tests once we need them in different files ...
 }
 

test/logic/locale.js

@@ -0,0 +1,54 @@
+import * as localeSystem from "../../src/locale";
+
+function run() {
+  test('Formatting with all arguments present and used', () => {
+    const string = 'The {adjective} {color} {animal} jumps over the lazy dog.';
+    const result = localeSystem.format(string, {
+      adjective: 'smart',
+      color: 'blue',
+      animal: 'cat'
+    });
+    expect(result).toEqual("The smart blue cat jumps over the lazy dog.")
+  });
+
+  test('Formatting with some arguments used twice', () => {
+    const string = 'The {adjective} {color} {animal} jumps over the {adjective} dog.';
+    const result = localeSystem.format(string, {
+      adjective: 'smart',
+      color: 'blue',
+      animal: 'cat'
+    });
+    expect(result).toEqual("The smart blue cat jumps over the smart dog.")
+  });
+
+  test('Formatting with some arguments not used', () => {
+    const string = 'The {adjective} brown {animal} jumps over the lazy dog.';
+    const result = localeSystem.format(string, {
+      adjective: 'smart',
+      color: 'blue',
+      animal: 'cat'
+    });
+    expect(result).toEqual("The smart brown cat jumps over the lazy dog.")
+  });
+
+  test('Formatting with some arguments missing', () => {
+    const string = 'The {adjective} {color} {animal} jumps over the lazy dog.';
+    const result = localeSystem.format(string, {
+      adjective: 'smart',
+      color: 'blue'
+    });
+    expect(result).toEqual("The smart blue {animal} jumps over the lazy dog.")
+  });
+
+  test('Formatting with some arguments having different casing', () => {
+    const string = 'The {aDjecTIVe} {Color} {animal} jumps over the lazy dog.';
+    const result = localeSystem.format(string, {
+      AdJECtivE: 'smart',
+      color: 'blue',
+      Animal: 'cat'
+    });
+    expect(result).toEqual("The smart blue cat jumps over the lazy dog.")
+  });
+}
+
+export default run;