Implemented Data Editor Svelte Test Structure

- Added yarn script to run data editor tests using Mocha.
- Added example function and Svelte store tests.

Closes #915

package.json

@@ -34,13 +34,15 @@
     "prewatch": "yarn gen-version-ts && yarn sbt",
     "watch": "run-func build/yarn-scripts.ts watch",
     "watch:svelte": "yarn webpack --env development=true -w -c ./src/svelte/webpack.config.js",
+    "watch:svelte-tests" : "mocha -r ts-node/register -w ./src/svelte/tests/**/*.test.ts",
     "webpack": "webpack --mode production --config ./webpack/ext-dev.webpack.config.js",
     "webpack:pkg": "webpack --mode production --config ./webpack/ext-package.webpack.config.js",
     "webpack:svelte": "webpack -c ./src/svelte/webpack.config.js",
     "prepackage": "yarn install && yarn compile && yarn webpack:pkg",
     "package": "run-func build/yarn-scripts.ts package && yarn --cwd dist/package install && yarn --cwd dist/package vsce package --out ../../",
     "pretest": "yarn compile && yarn webpack",
-    "test": "sbt test && node ./out/tests/runTest.js",
+    "test": "sbt test && yarn test:svelte && node ./out/tests/runTest.js",
+    "test:svelte": "mocha -r ts-node/register ./src/svelte/tests/**/*.test.ts",
     "sbt": "sbt debugger/Universal/packageBin",
     "svelte:check": "svelte-check --tsconfig ./tsconfig.json"
   },

src/svelte/src/components/Header/fieldsets/FileMetrics.ts

@@ -15,7 +15,7 @@
 
 import { SimpleWritable } from '../../../stores/localStore'
 
-class FileMetricsData {
+export class FileMetricsData {
   name: string = ''
   type: string = ''
   language: string = ''

src/svelte/tests/stores/index.test.ts

@@ -0,0 +1,62 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { describe, it } from 'mocha'
+import { fileMetrics, regularSizedFile, saveable } from '../../src/stores/index'
+import assert from 'assert'
+import { get } from 'svelte/store'
+import { FileMetricsData } from '../../src/components/Header/fieldsets/FileMetrics'
+
+describe('Data Editor Stores ( Derived )', () => {
+  describe('regularSizedFile', () => {
+    const TruthySize = 1024
+    const FalsySize = 1
+
+    it('should return true on regular computed sized viewports', () => {
+      fileMetrics.update((metrics) => {
+        metrics.computedSize = TruthySize
+        return metrics
+      })
+      assert.equal(get(regularSizedFile), true)
+    })
+    it('should return false on non-regular computed sized viewports', () => {
+      fileMetrics.update((metrics) => {
+        metrics.computedSize = FalsySize
+        return metrics
+      })
+      assert.equal(get(regularSizedFile), false)
+    })
+    after(() => {
+      fileMetrics.set(new FileMetricsData())
+    })
+  })
+
+  describe('saveable', () => {
+    it('should report boolean value derived from fileMetrics.changeCount', () => {
+      ;[
+        { count: 2, expect: true },
+        { count: 0, expect: false },
+      ].forEach((testValues) => {
+        fileMetrics.update((metrics) => {
+          metrics.changeCount = testValues.count
+          return metrics
+        })
+        assert.equal(get(saveable), testValues.expect)
+      })
+    })
+  })
+})

src/svelte/tests/utilities/display.test.ts

@@ -0,0 +1,55 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { describe, it } from 'mocha'
+import { radixBytePad, radixToString } from '../../src/utilities/display'
+import { RadixValues } from '../../src/stores/configuration'
+import assert from 'assert'
+
+describe('Display Functions', () => {
+  describe('radixBytePad', () => {
+    it('should return the appropriate text length per radix value given', () => {
+      ;[
+        { radix: 2, pad: 8 },
+        { radix: 8, pad: 3 },
+        { radix: 10, pad: 3 },
+        { radix: 16, pad: 2 },
+      ].forEach((assertionPair) => {
+        assert.equal(
+          radixBytePad(assertionPair.radix as RadixValues),
+          assertionPair.pad
+        )
+      })
+    })
+  })
+
+  describe('radixToString', () => {
+    it('should return the correct radix index string from RadixValue', () => {
+      ;[
+        { radix: 2, str: 'bin' },
+        { radix: 8, str: 'oct' },
+        { radix: 10, str: 'dec' },
+        { radix: 16, str: 'hex' },
+      ].forEach((assertionPair) => {
+        assert.equal(
+          radixToString(assertionPair.radix as RadixValues),
+          assertionPair.str
+        )
+      })
+    })
+  })
+})