diff --git a/src/utils/spec/validateInput.spec.ts b/src/utils/spec/validateInput.spec.ts
new file mode 100644
index 0000000..2ddcdd6
--- /dev/null
+++ b/src/utils/spec/validateInput.spec.ts
@@ -0,0 +1,84 @@
+import {
+  validateInput,
+  INVALID_TABLE_STRUCTURE,
+  MORE_INFO
+} from '../validateInput'
+
+const tableArray = [{ col1: 'first col value' }]
+const stringData: any = { table1: tableArray }
+
+describe('validateInput', () => {
+  it('should not return an error message if input data valid', () => {
+    const validationResult = validateInput(stringData)
+    expect(validationResult).toEqual({
+      status: true,
+      msg: ''
+    })
+  })
+
+  it('should not return an error message if input data is null', () => {
+    const validationResult = validateInput(null)
+    expect(validationResult).toEqual({
+      status: true,
+      msg: ''
+    })
+  })
+
+  it('should return an error message if input data is an array', () => {
+    const validationResult = validateInput(tableArray)
+    expect(validationResult).toEqual({
+      status: false,
+      msg: INVALID_TABLE_STRUCTURE
+    })
+  })
+
+  it('should return an error message if first letter of table is neither alphabet nor underscore', () => {
+    const validationResult = validateInput({ '1stTable': tableArray })
+    expect(validationResult).toEqual({
+      status: false,
+      msg: 'First letter of table should be alphabet or underscore.'
+    })
+  })
+
+  it('should return an error message if table name contains a character other than alphanumeric or underscore', () => {
+    const validationResult = validateInput({ 'table!': tableArray })
+    expect(validationResult).toEqual({
+      status: false,
+      msg: 'Table name should be alphanumeric.'
+    })
+  })
+
+  it('should return an error message if length of table name contains exceeds 32', () => {
+    const validationResult = validateInput({
+      xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx: tableArray
+    })
+    expect(validationResult).toEqual({
+      status: false,
+      msg: 'Maximum length for table name could be 32 characters.'
+    })
+  })
+
+  it('should return an error message if table does not have array of objects', () => {
+    const validationResult = validateInput({ table: stringData })
+    expect(validationResult).toEqual({
+      status: false,
+      msg: INVALID_TABLE_STRUCTURE
+    })
+  })
+
+  it('should return an error message if a table array has an item other than object', () => {
+    const validationResult = validateInput({ table1: ['invalid'] })
+    expect(validationResult).toEqual({
+      status: false,
+      msg: `Table table1 contains invalid structure. ${MORE_INFO}`
+    })
+  })
+
+  it('should return an error message if a row in a table contains an column with undefined value', () => {
+    const validationResult = validateInput({ table1: [{ column: undefined }] })
+    expect(validationResult).toEqual({
+      status: false,
+      msg: `A row in table table1 contains invalid value. Can't assign undefined to column.`
+    })
+  })
+})