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tests/utils.test..ts

@@ -51,3 +51,37 @@ test('Testing dropFirstElements - smaller (0)', () => {
     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')
+})