Fix failure in the-main-function example

examples/the-main-function/tests/the_main_function_test.bal

@@ -21,20 +21,9 @@ public function mockPrint(any|error... s) {
 function testFunc() {
  test:when(mock_printLn).call("mockPrint");
 
- // Invoking the main function.
- error? e = main("Alice");
- test:assertTrue(e is ());
- test:assertExactEquals(outputs[0], "Name: Alice, Age: 18, Year: Freshman");
-
- // Invoking the main function.
- counter = 0;
- e = main("Alice", 20);
- test:assertTrue(e is ());
- test:assertExactEquals(outputs[0], "Name: Alice, Age: 20, Year: Freshman");
-
  // Invoking the main function.
  counter = 0;
- e = main("Alice", 18, "Sophomore");
+ error? e = main("Alice", 18, "Sophomore");
  test:assertTrue(e is ());
  test:assertExactEquals(outputs[0], "Name: Alice, Age: 18, Year: Sophomore");
 
@@ -46,7 +35,7 @@ function testFunc() {
 
  // Invoking the main function.
  counter = 0;
- e = main("Ali");
+ e = main("Ali", 30, "Freshman");
  if (e is error) {
  test:assertExactEquals(e.message(), "InvalidName");
  test:assertExactEquals(e.toString(), "error(\"InvalidName\",message=\"invalid length\")");

examples/the-main-function/the_main_function.bal

@@ -6,8 +6,8 @@ import ballerina/io;
 // The rest parameter `modules` represents the additional arguments.
 // The `main` function may return an `error` or `()`.
 public function main(string name,
- int age = 18,
- string year = "Freshman",
+ int age,
+ string year,
  string... modules)
  returns error? {
 

examples/the-main-function/the_main_function.out

@@ -1,18 +1,6 @@
 # To run this sample, navigate to the directory that contains the
 # `.bal` file, and execute the `bal run` command below.
 
-# Use the ballerina `run` command to invoke the `main` function specifying `Alice`
-# as the string argument for `name`. `18` would be set as the value for
-# `age` and `Freshman` would be set as the value for `year`.
-bal run the_main_function.bal -- Alice
-Name: Alice, Age: 18, Year: Freshman
-
-# Use the ballerina `run` command to invoke the `main` function specifying `Alice`
-# as the string argument for `name` and `20` as the integer value for
-# `age`. Both arguments are specified as operands.
-bal run the_main_function.bal -- Alice 20
-Name: Alice, Age: 20, Year: Freshman
-
 # Use the ballerina `run` command to invoke the `main` function specifying `Alice`
 # as the string argument for `name`, 18 as the `age` and `Sophomore` as the string
 # argument for `year`.
@@ -27,5 +15,5 @@ Name: Alice, Age: 20, Year: Sophomore, Module(s): ["math","physics"]
 
 # Use the ballerina `run` command to invoke the `main` function specifying an invalid 
 # string as the argument for `name`. The `error` returned would be printed.
-bal run the_main_function.bal -- Ali
+ bal run the_main_function.bal -- Ali 30 Freshman
 error: InvalidName {"message":"invalid length"}