Add unit tests for new reporter blocks in looks

test/unit/blocks_looks.js

@@ -0,0 +1,52 @@
+const test = require('tap').test;
+const Looks = require('../../src/blocks/scratch3_looks');
+const util = {
+    target: {
+        currentCostume: 0, // Internally, current costume is 0 indexed
+        sprite: {
+            costumes: [
+                {name: 'first name'},
+                {name: 'second name'},
+                {name: 'third name'}
+            ]
+        }
+    }
+};
+
+const fakeRuntime = {
+    getTargetForStage: () => util.target, // Just return the dummy target above.
+    on: () => {} // Stub out listener methods used in constructor.
+};
+const blocks = new Looks(fakeRuntime);
+
+test('getCostumeNumberName returns 1-indexed costume number', t => {
+    util.target.currentCostume = 0; // This is 0-indexed.
+    const args = {NUMBER_NAME: 'number'};
+    const number = blocks.getCostumeNumberName(args, util);
+    t.strictEqual(number, 1);
+    t.end();
+});
+
+test('getCostumeNumberName can return costume name', t => {
+    util.target.currentCostume = 0; // This is 0-indexed.
+    const args = {NUMBER_NAME: 'name'};
+    const number = blocks.getCostumeNumberName(args, util);
+    t.strictEqual(number, 'first name');
+    t.end();
+});
+
+test('getBackdropNumberName returns 1-indexed costume number', t => {
+    util.target.currentCostume = 2; // This is 0-indexed.
+    const args = {NUMBER_NAME: 'number'};
+    const number = blocks.getBackdropNumberName(args, util);
+    t.strictEqual(number, 3);
+    t.end();
+});
+
+test('getBackdropNumberName can return costume name', t => {
+    util.target.currentCostume = 2; // This is 0-indexed.
+    const args = {NUMBER_NAME: 'name'};
+    const number = blocks.getBackdropNumberName(args, util);
+    t.strictEqual(number, 'third name');
+    t.end();
+});