Fixed naming

tests/utils.test.ts

@@ -0,0 +1,87 @@
+import Utils from '../src/utils/Utils'
+
+test('Testing dropFirstElements - larger', () => {
+    const originalArray = []
+    for (let index = 0; index < 20; index++) {
+        originalArray.push('A' + index)
+    }
+
+    expect(Utils.dropFirstElements(originalArray, 2).join(',')) //
+        .toBe('A18,A19')
+})
+
+test('Testing dropFirstElements - same', () => {
+    const originalArray = []
+    for (let index = 0; index < 2; index++) {
+        originalArray.push('A' + index)
+    }
+
+    expect(Utils.dropFirstElements(originalArray, 2).join(',')) //
+        .toBe('A0,A1')
+})
+
+test('Testing dropFirstElements - smaller', () => {
+    const originalArray = []
+    for (let index = 0; index < 2; index++) {
+        originalArray.push('A' + index)
+    }
+
+    expect(Utils.dropFirstElements(originalArray, 3).join(',')) //
+        .toBe('A0,A1')
+})
+
+
+test('Testing dropFirstElements - smaller (1)', () => {
+    const originalArray = []
+    for (let index = 0; index < 1; index++) {
+        originalArray.push('A' + index)
+    }
+
+    expect(Utils.dropFirstElements(originalArray, 3).join(',')) //
+        .toBe('A0')
+})
+
+
+test('Testing dropFirstElements - smaller (0)', () => {
+    const originalArray = []
+    for (let index = 0; index < 0; index++) {
+        originalArray.push('A' + index)
+    }
+
+    expect(Utils.dropFirstElements(originalArray, 3).join(',')) //
+        .toBe('')
+})
+
+interface TestArray {
+    val1: string
+    val2: string
+}
+
+function createTestArray() {
+    const originalArray: TestArray[] = []
+    for (let index = 0; index < 2; index++) {
+        originalArray.push({
+            val1: 'e-1-' + (index + 1),
+            val2: 'e-2-' + (index + 1),
+        })
+    }
+    return originalArray
+}
+
+test('Testing filter in place - remove 1st', () => {
+    const originalArray = createTestArray()
+
+    Utils.filterInPlace(originalArray, v => v.val1 !== 'e-1-1')
+    expect(originalArray.length).toBe(1)
+    expect(originalArray[0].val1).toBe('e-1-2')
+    expect(originalArray[0].val2).toBe('e-2-2')
+})
+
+test('Testing filter in place - remove 2nd', () => {
+    const originalArray = createTestArray()
+
+    Utils.filterInPlace(originalArray, v => v.val1 !== 'e-1-2')
+    expect(originalArray.length).toBe(1)
+    expect(originalArray[0].val1).toBe('e-1-1')
+    expect(originalArray[0].val2).toBe('e-2-1')
+})