added several edge cases to pass the tests

Author: Dipa-Sarker

Sprint-3/2-practice-tdd/count.test.js

@@ -12,3 +12,59 @@ test("should count no occurrences of a character", () => {
   const count = countChar(str, char);
   expect(count).toEqual(0);
 });
+
+test("should count no occurrences of a character", () => {
+  const str = "";
+  const char = "a";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+test("should count minnimum occurrence of a character", () => {
+  const str = "a";
+  const char = "a";
+  const count = countChar(str, char);
+  expect(count).toEqual(1);
+});
+
+test("should count no occurrences of a character", () => {
+  const str = "b";
+  const char = "a";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+test("should count occurrence of special character", () => {
+  const str = "!!!!";
+  const char = "!";
+  const count = countChar(str, char);
+  expect(count).toEqual(4);
+});
+
+test("should count character at the beggining", () => {
+  const str = "cow";
+  const char = "c";
+  const count = countChar(str, char);
+  expect(count).toEqual(1);
+});
+
+test("should count character at the end", () => {
+  const str = "apple";
+  const char = "e";
+  const count = countChar(str, char);
+  expect(count).toEqual(1);
+});
+
+test("should count lowercase character", () => {
+  const str = "Apple";
+  const char = "a";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+test("should count occurrence of spaces", () => {
+  const str = "a b c";
+  const char = " ";
+  const count = countChar(str, char);
+  expect(count).toEqual(2);
+});