Add exercises

Author: tshemsedinov

Exercises/1-for.js

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+'use strict';
+
+const sum = (...args) => {
+  // Use for loop and accumulator variable
+  // to calculate sum of all given arguments
+  // For example sum(1, 2, 3) should return 6
+};
+
+module.exports = { sum };

Exercises/1-for.test

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+({
+  name: 'sum',
+  length: [70, 130],
+  cases: [
+    [1, 2, 3, 6],
+    [0, 0],
+    [0],
+    [1, -1, 1, 1],
+    [10, -1, -1, -1, 7],
+  ],
+  test: sum => {
+    const src = sum.toString();
+    if (!src.includes('for (')) throw new Error('Use for loop');
+    if (!src.includes('for (let')) throw new Error('Use let for accumulator');
+    if (!src.includes('return')) throw new Error('Use return');
+  }
+})

Exercises/2-for-of.js

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+'use strict';
+
+const sum = (...args) => {
+  // Use for..of loop and accumulator variable
+  // to calculate sum of all given arguments
+  // For example sum(1, 2, 3) should return 6
+};
+
+module.exports = { sum };

Exercises/2-for-of.test

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+({
+  name: 'sum',
+  length: [70, 130],
+  cases: [
+    [1, 2, 3, 6],
+    [0, 0],
+    [0],
+    [1, -1, 1, 1],
+    [10, -1, -1, -1, 7],
+  ],
+  test: sum => {
+    const src = sum.toString();
+    if (!src.includes('for (')) throw new Error('Use for..of loop');
+    if (!src.includes(' of ')) throw new Error('Use for..of in loop');
+    if (!src.includes('for (const')) throw new Error('Use const in loop');
+    if (!src.includes('let')) throw new Error('Use let to define accumulator');
+    if (!src.includes('return')) throw new Error('Use return');
+  }
+})

Exercises/3-while.js

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+'use strict';
+
+const sum = (...args) => {
+  // Use while loop and accumulator variable
+  // to calculate sum of all given arguments
+  // For example sum(1, 2, 3) should return 6
+};
+
+module.exports = { sum };

Exercises/3-while.test

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+({
+  name: 'sum',
+  length: [100, 130],
+  cases: [
+    [1, 2, 3, 6],
+    [0, 0],
+    [0],
+    [1, -1, 1, 1],
+    [10, -1, -1, -1, 7],
+  ],
+  test: sum => {
+    const src = sum.toString();
+    if (!src.includes('while (')) throw new Error('Use while loop');
+    if (!src.includes('let')) throw new Error('Use let to define accumulator');
+    if (!src.includes('return')) throw new Error('Use return');
+  }
+})

Exercises/4-do-while.js

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+'use strict';
+
+const sum = (...args) => {
+  // Use do..while loop and accumulator variable
+  // to calculate sum of all given arguments
+  // For example sum(1, 2, 3) should return 6
+};
+
+module.exports = { sum };

Exercises/4-do-while.test

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+({
+  name: 'sum',
+  length: [130, 160],
+  cases: [
+    [1, 2, 3, 6],
+    [0, 0],
+    [0],
+    [1, -1, 1, 1],
+    [10, -1, -1, -1, 7],
+  ],
+  test: sum => {
+    const src = sum.toString();
+    if (!src.includes('while (')) throw new Error('Use while loop');
+    if (!src.includes('let')) throw new Error('Use let to define accumulator');
+    if (!src.includes('return')) throw new Error('Use return');
+  }
+})

Exercises/5-reduce.js

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+'use strict';
+
+const sum = (...args) => 0;
+// Use Array.prototype.reduce method
+// to calculate sum of all given arguments
+// For example sum(1, 2, 3) should return 6
+
+module.exports = { sum };

Exercises/5-reduce.test

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+({
+  name: 'sum',
+  length: [40, 60],
+  cases: [
+    [1, 2, 3, 6],
+    [0, 0],
+    [0],
+    [1, -1, 1, 1],
+    [10, -1, -1, -1, 7],
+  ],
+  test: sum => {
+    const src = sum.toString();
+    if (!src.includes('.reduce(')) throw new Error('Use reduce method');
+    if (src.includes('return')) throw new Error('Do not use return');
+  }
+})