fix: multiple fixes in examples and e2e tests

README.md

@@ -74,14 +74,16 @@ Hello, World!
 If you open `my_awesome_project/src/main.neva` with your favorite IDE you'll see this
 
 ```neva
+import { fmt }
+
 def Main(start) (stop) {
-	Println
+	fmt.Println
 	---
 	:start -> { 'Hello, World!' -> println -> :stop }
 }
 ```
 
-The `Main` component has `start` inport and `stop` outport, with a `println` node (instance of stdlib's `Println`). The network after `---` shows: on `start` message, `"Hello, World!"` is sent to `println`, then program terminates via `stop` signal.
+The `import { fmt }` statement imports the standard library's `fmt` module which provides common formatting and printing functionality. The `Main` component has `start` inport and `stop` outport, with a `println` node (instance of stdlib's `fmt.Println`). The network after `---` shows: on `start` message, `"Hello, World!"` is sent to `println`, then program terminates via `stop` signal.
 
 ### What's Next?
 

e2e/99_bottles_verbose/main/main.neva

@@ -31,7 +31,7 @@ const firstLine2 string = '1 bottle of beer on the wall, 1 bottle of beer.'
 const firstLine3 string = 'No more bottles of beer on the wall, no more bottles of beer.'
 
 def PrintFirstLine(n int) (n int) {
-    s Switch<int>, p1 fmt.Println, p2 fmt.Println, Printf, Lock<int>, Panic
+    s Switch<int>, p1 fmt.Println, p2 fmt.Println, fmt.Printf, Lock<int>, Panic
     ---
     :n -> [s:data, lock:data]
 
@@ -58,19 +58,19 @@ const secondLine3 string = 'Take one down and pass it around, no more bottles of
 const secondLine4 string = 'Go to the store and buy some more, 99 bottles of beer on the wall.'
 
 def PrintSecondLine(n int) (n int) {
-    Switch<int>, p1 fmt.Println, p2 fmt.Println, p3 fmt.Println, Printf, Lock<int>, Panic
+    s Switch<int>, p1 fmt.Println, p2 fmt.Println, p3 fmt.Println, fmt.Printf, Lock<int>, Panic
     ---
-    :n -> [switch:data, lock:data]
+    :n -> [s:data, lock:data]
 
-    -1 -> switch:case[0]
-    0  -> switch:case[1]
-    1  -> switch:case[2]
+    -1 -> s:case[0]
+    0  -> s:case[1]
+    1  -> s:case[2]
 
-    switch:case[0] -> { $secondLine4 -> p1:data }
-    switch:case[1] -> { $secondLine3 -> p2:data }
-    switch:case[2] -> { $secondLine2 -> p3:data }
+    s:case[0] -> { $secondLine4 -> p1:data }
+    s:case[1] -> { $secondLine3 -> p2:data }
+    s:case[2] -> { $secondLine2 -> p3:data }
 
-    switch:else -> [
+    s:else -> [
         printf:args[0],
         { $secondLine1 -> printf:tpl }
     ]

e2e/array_inport_holes/e2e_test.go

@@ -15,10 +15,10 @@ func Test(t *testing.T) {
 	out, err := cmd.CombinedOutput()
 	require.NoError(t, err)
 
-	require.Equal(
+	require.Contains(
 		t,
-		"main/main.neva: array inport 'printf:args' is used incorrectly: slot 1 is missing\n",
 		string(out),
+		"main/main.neva: array inport 'printf:args' is used incorrectly: slot 1 is missing\n",
 	)
 
 	require.Equal(t, 0, cmd.ProcessState.ExitCode())

e2e/array_inport_holes/main/main.neva

@@ -1,7 +1,7 @@
-import { io }
+import { fmt }
 
 def Main(start any) (stop any) {
-	Printf
+	fmt.Printf
 	---
 	:start -> { '$1 $2 $3' -> printf:tpl }
 	1 -> printf:args[0]

e2e/array_outport_holes/e2e_test.go

@@ -15,10 +15,10 @@ func Test(t *testing.T) {
 	out, err := cmd.CombinedOutput()
 	require.NoError(t, err)
 
-	require.Equal(
+	require.Contains(
 		t,
-		"main/main.neva: array outport 'fanOut:' is used incorrectly: slot 1 is missing\n",
 		string(out),
+		"main/main.neva: array outport 'fanOut:data' is used incorrectly: slot 1 is missing\n",
 	)
 
 	require.Equal(t, 0, cmd.ProcessState.ExitCode())

e2e/duplicate_receiver/e2e_test.go

@@ -15,10 +15,10 @@ func Test(t *testing.T) {
 	out, err := cmd.CombinedOutput()
 	require.NoError(t, err)
 
-	require.Equal(
+	require.Contains(
 		t,
-		"main/main.neva:7:1: port 'println' is used twice\n",
 		string(out),
+		"main/main.neva:7:1: port 'println:sig' is used twice\n",
 	)
 
 	require.Equal(t, 0, cmd.ProcessState.ExitCode())

examples/map_list/e2e_test.go

@@ -8,7 +8,7 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-func Test(t *testing.T) { 
+func Test(t *testing.T) {
 	err := os.Chdir("..")
 	require.NoError(t, err)
 

examples/select/e2e_test.go

@@ -18,6 +18,7 @@ func Test(t *testing.T) {
 	defer os.Chdir(wd)
 
 	for i := 0; i < 100; i++ {
+		t.Logf("Running iteration %d", i)
 		cmd := exec.Command("neva", "run", "select")
 		out, err := cmd.CombinedOutput()
 		if err != nil {

internal/cli/new.go

@@ -44,8 +44,10 @@ func createNevaMod(path string) error {
 	}
 
 	// Create main.neva file
-	mainNevaContent := `def Main(start) (stop) {
-	Println
+	mainNevaContent := `import { fmt }
+
+def Main(start) (stop) {
+	fmt.Println
 	---
 	:start -> { 'Hello, World!' -> println -> :stop }
 }`