Add tests

main_test.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"testing"
+)
+
+// Returns a string with a length between 1 and 2000 characters
+func TestGetPostsFromReddit_ReturnsPostWithValidLength(t *testing.T) {
+	subreddit := "celebs"
+	post, err := GetPostsFromReddit(subreddit)
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+	if len(post) < 1 || len(post) > 2000 {
+		t.Errorf("Post length is not within the valid range")
+	}
+}
+
+// Returns an error when the subreddit does not exist
+func TestGetPostsFromReddit_ReturnsErrorWhenSubredditDoesNotExist(t *testing.T) {
+	subreddit := "nonexistent"
+	_, err := GetPostsFromReddit(subreddit)
+	if err == nil {
+		t.Errorf("Expected error, but got nil")
+	}
+}
+
+// Returns an error when the subreddit is empty
+func TestGetPostsFromReddit_ReturnsErrorWhenSubredditIsEmpty(t *testing.T) {
+	subreddit := ""
+	_, err := GetPostsFromReddit(subreddit)
+	if err.Error() != "subreddit cannot be empty" {
+		t.Errorf("Expected error 'subreddit cannot be empty', but got '%v'", err)
+	}
+}