Write cases for testing proper and improper fractions.

Author: russom

implement-and-rewrite-tests/implement-tests-with-node-test/2-is-proper-fraction.test.js

@@ -10,3 +10,58 @@ test("Basic proper fraction", () => {
   // Example: 1/2 is a proper fraction
   assert.equal(isProperFraction(1, 2), true);
 });
+
+// Proper fraction
+test("Decimal proper fraction", () => {
+  assert.equal(isProperFraction(0.5, 1.5), true);
+});
+
+test("0 numerator proper fraction", () => {
+  assert.equal(isProperFraction(0, 5), true);
+});
+
+test("Negative numerator proper fraction", () => {
+  assert.equal(isProperFraction(-9, 1), true);
+});
+
+test("Both negatives proper fraction", () => {
+  assert.equal(isProperFraction(-7, -3), true);
+});
+
+test("Large number proper fraction", () => {
+  assert.equal(isProperFraction(999, 1000), true);
+});
+
+test("Very small denominator proper fraction", () => {
+  assert.equal(isProperFraction(1, 1000000), true);
+});
+
+// Improper fractions
+
+test("Decimal improper fraction", () => {
+  assert.equal(isProperFraction(1.2, 1.1), false);
+});
+
+test("Numerator larger improper fraction", () => {
+  assert.equal(isProperFraction(5, 3), false);
+});
+
+test("Both equal improper fraction", () => {
+  assert.equal(isProperFraction(4, 4), false);
+});
+
+test("0 denominator improper fraction", () => {
+  assert.equal(isProperFraction(7, 0), false);
+});
+
+test("Both 0 improper fraction", () => {
+  assert.equal(isProperFraction(0, 0), false);
+});
+
+test("Both equal negatives improper fraction", () => {
+  assert.equal(isProperFraction(-4, -4), false);
+});
+
+test("Negative denominator improper fraction", () => {
+  assert.equal(isProperFraction(2, -9), false);
+});